We are hiring a Senior Security Engineer to protect the people, infrastructure, and tooling that goes into building and hosting Mattermost. This is a hands-on, high-impact role at the intersection of enterprise security engineering, cloud information security, and AI-enabled threat response.

Why Join Mattermost

•   Fully remote, globally distributed team | no commute, genuine flexibility
•   Be a key voice in shaping and delivering security strategy
•   Competitive salary, equity, and benefits with meaningful work attached

The Role

As a Senior Security Engineer, you will lead the design and implementation of security tooling, harden our cloud and IT infrastructure, and serve as a key responder to incidents. You will work across a globally distributed team and partner closely with Engineering to manage AI-enabled risk.

Key Responsibilities

• Lead security and IT projects to enhance the security posture of infrastructure and the company
• Detect, investigate, and remediate security incidents using SIEM, EDR, and SOAR tooling (e.g. CrowdStrike, SentinelOne)
• Conduct threat hunting across cloud and endpoint environments using a Zero Trust framework
• Administer company-wide IAM and security monitoring infrastructure
• Contribute to security policies, incident response, forensics, and endpoint management programmes
• Partner with Engineering to assess and mitigate risks from AI-enabled tools and workflows
• Explore and implement AI/automation in detection, analysis, and response pipelines
• Engage closely with North American and international staff across time zones

Required Background & Skills

•   Bachelor’s degree in Computer Science or a related field, or significant professional security experience
•   3+ years of hands-on experience in security engineering and incident response
•   Experience with SIEM platforms and security monitoring systems
•   Experience with EDR tools such as CrowdStrike or SentinelOne
•   Knowledge of SOAR platforms and automation of security workflows
•   Familiarity with Zero Trust architecture principles and threat hunting methodologies
•   Experience with cloud security controls across AWS, GCP, and/or Azure
•   Strong knowledge of Linux systems and Kubernetes/Docker environments
•   Experience with IAM solutions and infrastructure automation
•   Practical experience evaluating security implications of AI systems and AI-assisted workflows
•   Experience managing security of Microsoft 365 and Google Workspace tenants
•   Excellent written and verbal communication skills

Preferred Background & Skills

• Experience with certification processes: SOC2, ISO 27001, FedRAMP, or Cyber Essentials Plus 
• Certifications: OSCP, GCIH, GCFA, or equivalent penetration testing / incident response credentials
• Experience in Go or Python
• Background in open-source communities
• Endpoint security management experience in a fully remote organisation

Export Control & Eligibility

This role may involve access to information subject to U.S. export control regulations (EAR/ITAR). Applicants should be aware that eligibility requirements may apply. We encourage candidates with questions about this to reach out. Many Spain-based security professionals with defence backgrounds will qualify. We are happy to discuss your specific situation.

Mattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

Mattermost is the secure collaboration platform trusted by Global organizations. Our platform runs on-premises, cloud, and in air-gapped environments, enabling mission-critical workflows from the tactical edge to the enterprise HQ, where data sovereignty and operational security are non-negotiable.

We are hiring a Senior Security Engineer to protect the people, infrastructure, and tooling that goes into building and hosting Mattermost. This is a hands-on, high-impact role at the intersection of enterprise security engineering, cloud information security, and AI-enabled threat response.

Why Join Mattermost

•   Fully remote, globally distributed team | no commute, genuine flexibility
•   Be a key voice in shaping and delivering security strategy
•   Competitive salary, equity, and benefits with meaningful work attached

The Role

As a Senior Security Engineer, you will lead the design and implementation of security tooling, harden our cloud and IT infrastructure, and serve as a key responder to incidents. You will work across a globally distributed team and partner closely with Engineering to manage AI-enabled risk.

Key Responsibilities

• Lead security and IT projects to enhance the security posture of infrastructure and the company
• Detect, investigate, and remediate security incidents using SIEM, EDR, and SOAR tooling (e.g. CrowdStrike, SentinelOne)
• Conduct threat hunting across cloud and endpoint environments using a Zero Trust framework
• Administer company-wide IAM and security monitoring infrastructure
• Contribute to security policies, incident response, forensics, and endpoint management programmes
• Partner with Engineering to assess and mitigate risks from AI-enabled tools and workflows
• Explore and implement AI/automation in detection, analysis, and response pipelines
• Engage closely with North American and international staff across time zones

Required Background & Skills

•   Bachelor’s degree in Computer Science or a related field, or significant professional security experience
•   3+ years of hands-on experience in security engineering and incident response
•   Experience with SIEM platforms and security monitoring systems
•   Experience with EDR tools such as CrowdStrike or SentinelOne
•   Knowledge of SOAR platforms and automation of security workflows
•   Familiarity with Zero Trust architecture principles and threat hunting methodologies
•   Experience with cloud security controls across AWS, GCP, and/or Azure
•   Strong knowledge of Linux systems and Kubernetes/Docker environments
•   Experience with IAM solutions and infrastructure automation
•   Practical experience evaluating security implications of AI systems and AI-assisted workflows
•   Experience managing security of Microsoft 365 and Google Workspace tenants
•   Excellent written and verbal communication skills

Preferred Background & Skills

• Experience with certification processes: SOC2, ISO 27001, FedRAMP, or Cyber Essentials Plus 
• Certifications: OSCP, GCIH, GCFA, or equivalent penetration testing / incident response credentials
• Experience in Go or Python
• Background in open-source communities
• Endpoint security management experience in a fully remote organisation

Export Control & Eligibility

This role may involve access to information subject to U.S. export control regulations (EAR/ITAR). Applicants should be aware that eligibility requirements may apply. We encourage candidates with questions about this to reach out. Many UK-based security professionals with defence backgrounds will qualify. We are happy to discuss your specific situation.

Mattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

Mattermost is seeking a Senior Technical Account Manager (TAM) is a customer-facing technical leader responsible for ensuring the successful deployment, integration, and operational success of the Mattermost platform for enterprise and public sector clients across the United Kingdom.

This role requires strong technical expertise in infrastructure, cybersecurity, and DevSecOps, combined with the ability to build trusted relationships with customers across multiple regions and languages. The TAM serves as a trusted technical advisor—partnering with engineering, product, and customer teams to ensure reliable, secure, and scalable deployments of Mattermost.

Key Responsibilities

Customer Success & Technical Delivery

• Lead onboarding, deployment, and optimization of Mattermost for strategic enterprise customers.
• Design and validate scalable architectures for cloud, hybrid, and on-premise deployments.
• Guide customers on integrating Mattermost with identity providers (SSO, SAML, OAuth, LDAP), CI/CD pipelines, and monitoring tools.
• Support adoption across distributed teams by ensuring high reliability, security, and performance.
• Provide proactive technical guidance to prevent issues and optimize system architecture.

Technical Leadership & Advocacy

• Serve as the primary technical advisor for assigned customer accounts.
• Work closely with Product, Engineering, and Support teams to resolve technical challenges.
• Capture customer insights and feedback to influence product roadmap and feature development.
• Develop documentation, deployment templates, and automation assets to support customer success at scale.

Communication & Stakeholder Management

• Communicate complex technical concepts clearly to both technical and non-technical audiences.
• Build trusted relationships with stakeholders across UK
• Conduct technical workshops, architecture reviews, and implementation planning sessions.
• Maintain documentation of deployment architectures, customer requirements, and feedback.

Required Qualifications

• 5+ years experience in Technical Account Management, Solutions Engineering, DevOps Engineering, or a similar technical customer-facing role.
• Strong expertise in Linux, networking, containers (Docker/Kubernetes), and cloud infrastructure.
• Experience with scripting or development (Python, Go, Bash, Node.js, or similar).
• Familiarity with DevOps and CI/CD tools (GitHub/GitLab, Jenkins, Terraform, Jira).
• Strong understanding of cybersecurity best practices and secure system design.
• Proven ability to manage enterprise technical relationships and complex implementations.
• Applicants must meet eligibility requirements for access to export-controlled information as defined by U.S. export control laws, including EAR and ITAR. 
• Fluent English (written and spoken) required.
• Excellent communication and stakeholder management skills.
• Must be authorized to work in the United Kingdom.

Preferred Qualifications

• Experience supporting public sector, defense, or regulated industries.
• Familiarity with compliance frameworks such as ISO 27001, SOC 2, GDPR, NIS2, or UK NCSC security guidance.
• Experience supporting air-gapped or highly secure deployments.
• Existing or eligibility for security clearance such as UK Security Clearance (SC), French defense clearance, or NATO Secret clearance.
• Experience with mobile device management platforms (Intune, MobileIron, Workspace ONE).
• Experience working in a startup or high-growth SaaS environment.

Mattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

Mattermost is seeking a Senior Technical Account Manager (TAM) is a customer-facing technical leader responsible for ensuring the successful deployment, integration, and operational success of the Mattermost platform for enterprise and public sector clients across the United Kingdom and Francophone Europe.

This role requires strong technical expertise in infrastructure, cybersecurity, and DevSecOps, combined with the ability to build trusted relationships with customers across multiple regions and languages. The TAM serves as a trusted technical advisor—partnering with engineering, product, and customer teams to ensure reliable, secure, and scalable deployments of Mattermost.

Key Responsibilities

Customer Success & Technical Delivery

• Lead onboarding, deployment, and optimization of Mattermost for strategic enterprise customers.
• Design and validate scalable architectures for cloud, hybrid, and on-premise deployments.
• Guide customers on integrating Mattermost with identity providers (SSO, SAML, OAuth, LDAP), CI/CD pipelines, and monitoring tools.
• Support adoption across distributed teams by ensuring high reliability, security, and performance.
• Provide proactive technical guidance to prevent issues and optimize system architecture.

Technical Leadership & Advocacy

• Serve as the primary technical advisor for assigned customer accounts.
• Work closely with Product, Engineering, and Support teams to resolve technical challenges.
• Capture customer insights and feedback to influence product roadmap and feature development.
• Develop documentation, deployment templates, and automation assets to support customer success at scale.

Communication & Stakeholder Management

• Communicate complex technical concepts clearly to both technical and non-technical audiences.
• Build trusted relationships with stakeholders across UK and French-speaking regions.
• Conduct technical workshops, architecture reviews, and implementation planning sessions.
• Maintain documentation of deployment architectures, customer requirements, and feedback.

Required Qualifications

• 5+ years experience in Technical Account Management, Solutions Engineering, DevOps Engineering, or a similar technical customer-facing role.
• Strong expertise in Linux, networking, containers (Docker/Kubernetes), and cloud infrastructure.
• Experience with scripting or development (Python, Go, Bash, Node.js, or similar).
• Familiarity with DevOps and CI/CD tools (GitHub/GitLab, Jenkins, Terraform, Jira).
• Strong understanding of cybersecurity best practices and secure system design.
• Proven ability to manage enterprise technical relationships and complex implementations.
• Applicants must meet eligibility requirements for access to export-controlled information as defined by U.S. export control laws, including EAR and ITAR. 
• Fluent English and French (written and spoken) required.
• Excellent communication and stakeholder management skills.
• Must be authorized to work in the United Kingdom.

Preferred Qualifications

• Experience supporting public sector, defense, or regulated industries.
• Familiarity with compliance frameworks such as ISO 27001, SOC 2, GDPR, NIS2, or UK NCSC security guidance.
• Experience supporting air-gapped or highly secure deployments.
• Existing or eligibility for security clearance such as UK Security Clearance (SC), French defense clearance, or NATO Secret clearance.
• Experience with mobile device management platforms (Intune, MobileIron, Workspace ONE).
• Experience working in a startup or high-growth SaaS environment.

Mattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

Mattermost is seeking a Commercial Account Manager (CAM) – UK to support and accelerate commercial growth across the region. This is a collaborative, territory-aligned sales role that operates alongside Account Executives (AEs).

The CAM independently manages defined commercial sales motions while exercising strong judgment on when to partner with AEs on larger or more complex opportunities. This role is ideal for a commercially driven seller who thrives in a fast-paced SaaS environment and enjoys balancing net-new acquisition, expansion, and renewal management.

What You’ll Do

Inbound Net New Sales

• Own and execute inbound-led net-new opportunities

• Qualify and close small to mid-sized deals for customers not aligned to strategic AE territories

• Run discovery, qualification, objection handling, and closing motions independently

Expansion Ownership

• Lead expansions within existing accounts when scope and complexity allow

• Identify upsell and cross-sell opportunities through customer engagement and usage insights

• Partner with AEs on expansions that become larger, more strategic, or more complex

• Manage inbound expansion requests from existing customers (e.g., incremental license additions)

Renewal Management (Value-Driven)

• Own renewals requiring active customer engagement, risk mitigation, or expansion discovery

• Collaborate cross-functionally to ensure smooth, on-time renewals

• Serve as a trusted advisor by helping customers realize the value of Mattermost and building business cases to support renewals

Sales & Ecosystem Exposure

• Gain hands-on experience with the full buying cycle and commercial procurement considerations

Territory Enablement & Hygiene

• Act as a capacity multiplier for Account Executives

• Maintain strong CRM hygiene, forecasting accuracy, and deal documentation

• Own renewal and expansion records for assigned accounts, as well as net-new sales records within your scope

• Share insights and learnings to continuously improve territory execution

Required Background / Skills

Required

• 2–5+ years of experience in sales, account management, renewal management, or commercial closing roles

• Demonstrated ability to manage multiple sales cycles in parallel

• Strong discovery, communication, and deal execution skills

• Experience using CRM systems (Salesforce preferred)

Preferred

• Experience selling into regulated environments

• Exposure to commercial procurement processes

• SaaS or enterprise technology sales experience

Mattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

Mattermost is seeking a strategic, high-impact Strategic Partner Manager to drive our expansion within the most secure environments on earth.
Based in the UK, you will lead our engagement with Hyperscalers, System Integrators and specialised technology partners to deliver secure collaboration solutions to the Defence, Intelligence, Security and Critical National Infrastructure sectors. Your primary mission is to build a robust partner ecosystem that drives Net New Annual Recurring Revenue (ARR) by enabling mission-critical organisations to communicate securely.

Key Responsibilities

Driving Net New ARR & Revenue Growth

• Pipeline Generation: Own the "Partner-Sourced" revenue target, identifying and qualifying new business opportunities through Hyperscalers, ecosystem partners and System Integrator led projects.
• Commercial Strategy: Develop and execute joint business plans / GTMs with target partners that focus on high-yield Defence, Intelligence, Security and Critical National Infrastructure accounts,
  ensuring a clear path to $1M+ ARR deal cycles.
• Marketing Alignment: Maintain close alignment with Director, EMEA & APAC Marketing to ensure partner strategies, messaging, and market engagement activities are consistent with regional
  priorities and sector positioning.
• Marketplace Optimisation: Drive Mattermost presence in the Hyperscaler Marketplaces, leveraging co-sell programs and private offers to shorten procurement cycles.

Sales Integration & Reporting

• Direct Reporting: Report directly to the VP Sales, EMEA & APAC, focused on Partner-led growth and ecosystem health.
• Co-Selling Excellence: Act as the "glue" between Mattermost sales and the Partner sales teams. Facilitate joint account planning and ensure a seamless hand-off.
• Regional Strategy: Collaborate with Mattermost Sales team to identify & white space where partners provide the necessary local presence or security clearances to win.
• Performance Tracking: Maintain a rigorous cadence of reporting on Net New ARR, Partner- influenced pipeline and conversion rates.

Strategic Partner & Ecosystem Leadership

• Hyperscaler Management: Manage and grow our relationships with target Hyperscalers, ensuring Mattermost is the preferred secure collaboration solution.
• GSI & SI Orchestration: Identify, recruit, and enable Global System Integrators and regional specialists who serve our ICP customer base.
• Ecosystem: Help identify, recruit, and enable Ecosystem Partners who serve our ICP customer base.
• Industry Engagement & Events: Secure Mattermost participation at partner-led events, and drive partner involvement in Mattermost-led initiatives including user forums, executive briefings, and webinars.

Required Qualifications

• Tenure: Minimum of 10+ years of international experience in Partner Management, Alliances, or Channel Sales within the enterprise software industry.
• Domain Expertise: Deep familiarity with the Defence, Intelligence, or Cybersecurity landscape, including procurement cycles (e.g., MOD, NATO, CNI etc).
• Technical Literacy: Strong understanding of cloud infrastructure (SaaS vs. On-Prem) and regulated industry security requirements.
• Global Mindset: Proven track record of managing global relationships from a UK base across multiple time zones.

Preferred Skills & Attributes

• Proven Ability to Execute: A documented track record of exceeding partner generated revenue targets and delivering high-impact partner programs in a fast-paced environment.
• Structured Selling: Expert proficiency in structured selling methodologies (e.g. MEDDPICC). You use these methodologies to qualify Partner opportunities and ensure rigorous deal discipline across
  the ecosystem.
• AI-Augmented Productivity: Ability to leverage Generative AI and LLMs to accelerate job functions.
• Strategic Architect: Proven ability to build a comprehensive Partner strategy from the ground up, moving from high-level vision to tactical execution.
• Autonomous Alignment: Ability to work with a high degree of own initiative while remaining in lock-step alignment with Sales Leadership, AE and Account Management teams.
• Co-Selling Orchestrator: Skilled at navigating internal and external organisations to ensure partners are seen as an extension of our direct sales force.
• Mobile & Engaged: Willingness and ability to travel internationally to visit partners and support high-value deal cycles.

Why Mattermost?

• Mission-Critical Impact: We provide communication for the world’s most sophisticated Defence, Security and Critical National Infrastructure teams.
• Rapidly Scaling Organisation: Join a fast-growing company defining the secure collaboration category.
• High-Performance Sales Culture: Work alongside a world-class sales team characterised by high execution standards and a data-driven approach to growth.
• Open-source Heritage: Benefit from a highly extensible platform offering a level of transparency and trust that proprietary competitors cannot match.

Mattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.