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As VP of Search, you’ll set the vision and direction for our global Search practice—leading best-in-class SEO, SEM, and Generative Engine Optimization (GEO) strategies across a diverse portfolio of clients and regions. You are the global leader and point of contact for Search within the agency, responsible for practice leadership, quality standards, capability growth, and operational excellence.
You’ll translate the evolving search landscape—including AI-powered discovery (AI Overviews, LLMs, and “answer engines”)—into actionable strategies, scalable frameworks, and measurable business outcomes. You balance executive-level client counsel with hands-on strategic depth, while building and sustaining a high-performing global team through strategic talent planning, staffing, and resourcing.
You’ll play a pivotal role in expanding our Search services and capabilities and helping our clients achieve top-tier performance. You define what great looks like, ensure we deliver it consistently, and evolve our offering to keep CM at the forefront of the industry.
*This is a one-year contract opportunity*
You Will:
Practice leadership & operations
Client leadership & business growth
Innovation, AI search & future-proofing
Strategy & execution
You Have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassAs VP of Search, you’ll set the vision and direction for our global Search practice—leading best-in-class SEO, SEM, and Generative Engine Optimization (GEO) strategies across a diverse portfolio of clients and regions. You are the global leader and point of contact for Search within the agency, responsible for practice leadership, quality standards, capability growth, and operational excellence.
You’ll translate the evolving search landscape—including AI-powered discovery (AI Overviews, LLMs, and “answer engines”)—into actionable strategies, scalable frameworks, and measurable business outcomes. You balance executive-level client counsel with hands-on strategic depth, while building and sustaining a high-performing global team through strategic talent planning, staffing, and resourcing.
You’ll play a pivotal role in expanding our Search services and capabilities and helping our clients achieve top-tier performance. You define what great looks like, ensure we deliver it consistently, and evolve our offering to keep CM at the forefront of the industry.
*This is a one-year contract opportunity*
You Will:
Practice leadership & operations
Client leadership & business growth
Innovation, AI search & future-proofing
Strategy & execution
You Have:
*Please note, the pay range noted below is hourly*
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassAs VP of Search, you’ll set the vision and direction for our global Search practice—leading best-in-class SEO, SEM, and Generative Engine Optimization (GEO) strategies across a diverse portfolio of clients and regions. You are the global leader and point of contact for Search within the agency, responsible for practice leadership, quality standards, capability growth, and operational excellence.
You’ll translate the evolving search landscape—including AI-powered discovery (AI Overviews, LLMs, and “answer engines”)—into actionable strategies, scalable frameworks, and measurable business outcomes. You balance executive-level client counsel with hands-on strategic depth, while building and sustaining a high-performing global team through strategic talent planning, staffing, and resourcing.
You’ll play a pivotal role in expanding our Search services and capabilities and helping our clients achieve top-tier performance. You define what great looks like, ensure we deliver it consistently, and evolve our offering to keep CM at the forefront of the industry.
*This is a one-year contract opportunity*
You Will:
Practice leadership & operations
Client leadership & business growth
Innovation, AI search & future-proofing
Strategy & execution
You Have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassAs VP of Search, you’ll set the vision and direction for our global Search practice—leading best-in-class SEO, SEM, and Generative Engine Optimization (GEO) strategies across a diverse portfolio of clients and regions. You are the global leader and point of contact for Search within the agency, responsible for practice leadership, quality standards, capability growth, and operational excellence.
You’ll translate the evolving search landscape—including AI-powered discovery (AI Overviews, LLMs, and “answer engines”)—into actionable strategies, scalable frameworks, and measurable business outcomes. You balance executive-level client counsel with hands-on strategic depth, while building and sustaining a high-performing global team through strategic talent planning, staffing, and resourcing.
You’ll play a pivotal role in expanding our Search services and capabilities and helping our clients achieve top-tier performance. You define what great looks like, ensure we deliver it consistently, and evolve our offering to keep CM at the forefront of the industry.
*This is a one-year contract opportunity*
You Will:
Practice leadership & operations
Client leadership & business growth
Innovation, AI search & future-proofing
Strategy & execution
You Have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassWe are looking to add Freelance Associate Creative Directors to our Talent Roster for quick turnaround, shorter-term project engagements!
As an Associate Creative Director, you bring a creative voice with strategic thinking to projects. You have a diverse array of experiences to bring to the roll—from conceptual development to client relations to the execution of creative deliverables. Creating and communicating concepts, creating and implementing marketing strategies, and developing interactive solutions is on you. But you always ensure and rationalize all creative results against user experience management objectives to deliver excellent digital experiences.
Leading multidisciplinary teams—creative, technology, planning, account and project management, partners, and clients to name a few—doesn’t faze you. Balancing creative thinking with interpersonal skills, you justify concepts to both the client and the project team. You build long-term client relationships with expertise on client vertical markets. Most importantly, you embody and embrace our values—to be honest, inspired, drive, passionate and real—in everything you do.
You Will:
You Have:
Nice To Have
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassAs a Copywriter, you are a short storyteller who loves to collaborate with creatives and strategists to bring a digital voice to life. You’ve got the basics of site copy, banner ads and direct e-mails. Crafting short-form narratives for campaign creative is where you shine. This role will need all of that and still ask you to make the structure of your copy repeatable, flexible and more personalized than ever before. You’ve got a well-rounded knowledge of the broader industry—social media, usability, online marketing, and traditional advertising. Grasping communication challenges and devising imaginative solutions that are both brilliant and on-brand is what you do.
You Will:
You Have:
What We Offer:
Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassWe are looking to add Freelance Associate Creative Directors to our Talent Roster for quick turnaround, shorter-term project engagements!
As an Associate Creative Director, you bring a creative voice with strategic thinking to projects. You have a diverse array of experiences to bring to the roll—from conceptual development to client relations to the execution of creative deliverables. Creating and communicating concepts, creating and implementing marketing strategies, and developing interactive solutions is on you. But you always ensure and rationalize all creative results against user experience management objectives to deliver excellent digital experiences.
Leading multidisciplinary teams—creative, technology, planning, account and project management, partners, and clients to name a few—doesn’t faze you. Balancing creative thinking with interpersonal skills, you justify concepts to both the client and the project team. You build long-term client relationships with expertise on client vertical markets. Most importantly, you embody and embrace our values—to be honest, inspired, drive, passionate and real—in everything you do.
You Will:
You Have:
Nice To Have
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassThe Comms Planning Director partners across disciplines to create communication plans that translate marketing objectives into actionable go-to-market strategies grounded in audience understanding and business goals.
In partnership with strategy, media, creative, and marketing science, you will develop customer-centric connection plans that inform both our media and creative teams. You’ll be asked to ingest information and output ideas and structures that make the complex easy to understand and map out the important ways that media and creative are linked. Comms/Connections Planning is about inspiring breakthrough ideas and driving how they come to life. It’s about being able to look at the market opportunity, define the target in fresh and interesting ways, and know how to take full advantage of media capabilities.
Comms/Connection Planning Deliverables: campaign architecture, go-to-market, audience segmentation & messaging, idea mechanism, strategic story acts over time, sequential and re-targeting messaging etc.
You Will:
Your Key Capabilities:
You Have:
What We Offer:
Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassThe Art Director is responsible for conceptual development and the execution of creative deliverables. These responsibilities include creating and communicating concepts, implementing marketing strategies and developing interactive design solutions. Reporting to the Creative Director, the Art Director will work with and lead a collaborative team of designers, copywriters and production specialists. Balancing creative thinking with interpersonal skills, this person will demonstrate an ability to justify concepts to both the client and the project team.
Contract Details:
You Will:
You Have:
*The range listed below is hourly*
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassThe Comms Planning Director partners across disciplines to create communication plans that translate marketing objectives into actionable go-to-market strategies grounded in audience understanding and business goals.
In partnership with strategy, media, creative, and marketing science, you will develop customer-centric connection plans that inform both our media and creative teams. You’ll be asked to ingest information and output ideas and structures that make the complex easy to understand and map out the important ways that media and creative are linked. Comms/Connections Planning is about inspiring breakthrough ideas and driving how they come to life. It’s about being able to look at the market opportunity, define the target in fresh and interesting ways, and know how to take full advantage of media capabilities.
Comms/Connection Planning Deliverables: campaign architecture, go-to-market, audience segmentation & messaging, idea mechanism, strategic story acts over time, sequential and re-targeting messaging etc.
You Will:
Your Key Capabilities:
You Have:
What We Offer:
Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassThe Art Director is responsible for conceptual development and the execution of creative deliverables. These responsibilities include creating and communicating concepts, implementing marketing strategies and developing interactive design solutions. Reporting to the Creative Director, the Art Director will work with and lead a collaborative team of designers, copywriters and production specialists. Balancing creative thinking with interpersonal skills, this person will demonstrate an ability to justify concepts to both the client and the project team.
Contract Details:
You Will:
You Have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassCritical Mass is hiring for a contract Sr Project Manager. This is a high-visibility contract role on a dynamic communications team creating world-class digital marketing material. You'll work on exciting projects with tight timelines, meaningful scope, and the opportunity to make an immediate impact. If you're someone who thrives when challenges are real, timelines are tight, and excellence is non-negotiable, this is the role for you.
This role is a contract role from May 4, 2026 through Sept 25, 2026.
You Will:
You Have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassWe are looking to add Freelance Lead User Experience Designers to our Talent Roster for quick turnaround, shorter-term project engagements!
As Lead User Experience Designer, you're the rare leader who thinks like both a strategist and an artist. You speak fluent UX—information architecture, research, usability—but you also speak design—visual systems, motion, art direction. And increasingly, you speak AI: architecting conversational interfaces, exploring vibe-coded experiences, leveraging machine learning to create next-gen user experiences. You understand that great design extends beyond owned platforms—into the interfaces you design within third-party and media channels where you partner to maximize user engagement. You're looking to build and lead a team of UX and Product Designers who are equally fired up about creating experiences that are strategically sound, visually stunning, and genuinely innovative.
You juggle multiple complex projects without breaking a sweat, pivoting between high-level strategy sessions and detailed design feedback. You're the collaborator who bridges disciplines—connecting research to design, design to development, and all of it to business outcomes. You thrive in fast-paced environments, champion the user's voice against competing agendas, and mentor your team with the same rigor you apply to your own work. This role demands someone energized by the full spectrum of design—from wireframe to final pixel.
You will:
You have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassAs a Copywriter, you are a short storyteller who loves to collaborate with creatives and strategists to bring a digital voice to life. You’ve got the basics of site copy, banner ads and direct e-mails. Crafting short-form narratives for campaign creative is where you shine. This role will need all of that and still ask you to make the structure of your copy repeatable, flexible and more personalized than ever before. You’ve got a well-rounded knowledge of the broader industry—social media, usability, online marketing, and traditional advertising. Grasping communication challenges and devising imaginative solutions that are both brilliant and on-brand is what you do.
You Will:
You Have:
What We Offer:
Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassWe are looking to add Freelance Lead User Experience Designers to our Talent Roster for quick turnaround, shorter-term project engagements!
As Lead User Experience Designer, you're the rare leader who thinks like both a strategist and an artist. You speak fluent UX—information architecture, research, usability—but you also speak design—visual systems, motion, art direction. And increasingly, you speak AI: architecting conversational interfaces, exploring vibe-coded experiences, leveraging machine learning to create next-gen user experiences. You understand that great design extends beyond owned platforms—into the interfaces you design within third-party and media channels where you partner to maximize user engagement. You're looking to build and lead a team of UX and Product Designers who are equally fired up about creating experiences that are strategically sound, visually stunning, and genuinely innovative.
You juggle multiple complex projects without breaking a sweat, pivoting between high-level strategy sessions and detailed design feedback. You're the collaborator who bridges disciplines—connecting research to design, design to development, and all of it to business outcomes. You thrive in fast-paced environments, champion the user's voice against competing agendas, and mentor your team with the same rigor you apply to your own work. This role demands someone energized by the full spectrum of design—from wireframe to final pixel.
You will:
You have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassCritical Mass is hiring for a contract Sr Project Manager. This is a high-visibility contract role on a dynamic communications team creating world-class digital marketing material. You'll work on exciting projects with tight timelines, meaningful scope, and the opportunity to make an immediate impact. If you're someone who thrives when challenges are real, timelines are tight, and excellence is non-negotiable, this is the role for you.
This role is a contract role from May 4, 2026 through Sept 25, 2026.
You Will:
You Have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassThe Art Director is responsible for conceptual development and the execution of creative deliverables. These responsibilities include creating and communicating concepts, implementing marketing strategies and developing interactive design solutions. Reporting to the Creative Director, the Art Director will work with and lead a collaborative team of designers, copywriters and production specialists. Balancing creative thinking with interpersonal skills, this person will demonstrate an ability to justify concepts to both the client and the project team.
Contract Details:
You Will:
You Have:
*The range listed below is hourly*
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassCritical Mass is hiring for a contract Sr Project Manager. This is a high-visibility contract role on a dynamic communications team creating world-class digital marketing material. You'll work on exciting projects with tight timelines, meaningful scope, and the opportunity to make an immediate impact. If you're someone who thrives when challenges are real, timelines are tight, and excellence is non-negotiable, this is the role for you.
This role is a contract role from May 4, 2026 through Sept 25, 2026.
You Will:
You Have:
Critical Mass is an equal opportunity employer.
Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.
The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.
If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid
If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html
If U.K. based: https://www.gov.uk/consumer-protection-rights
If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx
Ready to apply?
Apply to Critical MassCookies & analytics
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