🌍 Finance Manager with Controller / Business Admin Experience (Remote | English)

Location: Fully Remote; Southern Africa or Eastern Europe locations welcome
Employment Type: Full-Time employee, on an annual contract term, with option to renew
Languages Required: English proficiency is mandatory
Experience Required: Mid-level, with a minimum of 5 years of experience in a similar role
Salary Range: Market-related
Reports to: Head of Finance (as Manager)
Works Closely With: Head of People and OET shareholders 
Work Travel Requirements: None
Start Date Goal: June 2026 (or sooner)

🧭 About Us

We’re a remote-first, mission-driven, registered non-profit, comprising around 50 highly-skilled and motivated professionals from all around the world! Our culture is built on trust, autonomy, and collaborative professionalism.

We thrive in a fast-paced, distributed environment, where communication is clear, empathy is second nature, and each of us takes full ownership of our work. We work independently, but also collaborate easily when appropriate.

Open Energy Transition (OET) is a non-profit organization advancing the global energy transition by developing innovative open-source tools and data solutions for energy and grid planning.

Our vision is to make open approaches the global standard by 2030, enabling energy planning that is more accessible, transparent, and effective.

This shift is essential to better guide trillion dollar worth public and private investment toward affordable, sustainable, and secure energy systems. This is not a distant aspiration; our work is already being adopted by leading system operators, regulators, and philanthropic partners.

We are currently looking for a Finance Manager to support our Head of Finance, as well as our shareholders.

To learn more about OET and our team, you can visit our website, and browse around our Handbook.

🎯 About the Role

In this role, you'll be working closely with our Head of Finance, supporting our general finance and accounting, controller, and business administration activities. The purpose of this role is to help ensure accurate financial operations, maintain compliance with German accounting requirements, support monthly payroll processes, work with our external vendors, review agreements, and support day-to-day bookkeeping and reporting.

Exciting activities include the transition to a new accounting system and ERP system and the setup of several improved internal controlling/ operation solutions.

You'll also work closely with our shareholders for general finance-related matters, reporting, and forecasting, as well as with our Head of People for payroll and other admin.

The ideal candidate is comfortable working autonomously and fully remotely as part of a dedicated, distributed team, and enjoys building efficient, functional, scalable, and transferrable financial processes that support mission-driven work.

This is a position that requires a high degree of discretion, attention-to-detail, self-management, professionalism, and confidentiality. Language proficiency in English is required, as this is our working language. Proficiency in German is a bonus, for communicating with certain external vendors, such as our tax consultants in Germany. 

We’re all about transparency, and want to give you the best possible opportunity to prepare for any potential interviews. To learn a bit more about the people you’ll be working most closely with, click here:

1. Our Head of Finance, Andris Prindulis
2. Our shareholders

🛠️ Your Key Responsibilities

• Maintain accurate financial records, including bookkeeping, reconciliations, and transaction tracking
• Process invoices, expenses, and payments while ensuring proper documentation and compliance
• Support monthly, quarterly, and annual financial closing processes
• Assist with financial reporting and internal financial tracking
• Create and maintain project- and Department-specific budgets
• Support compliance with German accounting and tax requirements in collaboration with external tax advisors
• Process monthly payroll across our direct entity and employer of record services
• Collaborate with the People Department on relevant matters
• Support audits and financial documentation requests as needed
• Contribute to improving financial workflows and documentation within the organization
• Cash flow management
• Financial planning (FP&A)
• Risk management
• Fundraising support

✅ You’ll Be a Great Fit If You Are/Have...

• 5 years minimum experience in accounting, finance, controlling, and/or bookkeeping
• Strong understanding of accounting principles, and ability to collaborate with external tax advisors to ensure compliance with local requirements (this being Germany in our case)
• Experience with accounting software and financial management tools (e.g. Odoo, Datev)
• Experience working with financial data, formulate, etc., in Google Sheets and Excel
• Strong attention to detail and organizational skills
• Ability to manage financial records accurately in a remote work environment, including the use of cloud storage and sharing (while maintaining strict access control)
• Strong communication skills and ability to collaborate with cross-functional teams asynchronously
• Fluency in English (our main working language) is mandatory. German proficiency (used with some vendors) is a bonus.

💎 Bonus Points For

• Interest in open-source collaboration and/or the energy sector
• Prior work at a startup and/or in the energy sector
• Prior work as part of a fully-remote, distributed team
• Prior work on open-source projects
• Familiarity with donor-funded or non-profit environments
• Experience with Odoo, or other similar platforms
• Experience processing payroll and invoices for employers of record
• Experience reporting directly to senior leadership

A university degree is not required—your experience, communication skills, and work ethic matter most. However, if you happen to have a degree in business, finance, accounting, economics, or a similar field, that may be considered a bonus.

✨ What We Offer

• A flexible, fully-remote work environment where you’re trusted to work very autonomously. Zero micro-management, as that goes against our culture.
• The opportunity to support hardworking, passionate, busy leaders who value and respect your contributions, and are working to create positive societal change in the energy sector.
• A culture that values transparency, empathy, trust, humility, diversity, collaboration, and recognition.
• We have an open-door policy, and value reciprocal feedback. You’ll always know where you stand, and always have the ability to have your voice heard, simply by reaching out.
• A pretty flat hierarchical structure, where titles are not emphasized, and all contributions are valued.
• Competitive salary with growth potential. Any relevant benefits depend on your region of residence.
• Supportive onboarding and training, tailored to your strengths, interests, and career ambitions.
• The ability to be part of our formation! We’re still growing, changing, and improving. Anyone who is part of our team now is able to meaningfully contribute towards our culture, and processes. We’re open to all suggestions, and take them seriously!

📝 What Our Hiring Process Entails

We take hiring seriously, and want to bring on candidates who will contribute positively towards our culture just as much as they will succeed in their roles.

Also, we don’t only want to have good outcomes from you. We also want you to feel happy and fulfilled in your position. That means we have a structured process to determine best fit. Our hiring process is as follows:

1. Candidates apply via Greenhouse, and include as much information as possible and comfortable.
2. Various team members of OET will shortlist candidates in our ATS.
3. Certain shortlisted candidates will be contacted to arrange a screening call.
4. Screening calls are conducted, and feature a max. 30 minute chat with our People Team.
5. Certain candidates will go through to a first-round interview, of max. 1 hour, with our People Team. This interview will screen for a combination of competency and culture fit.
6. Finalists will go through to a second-round interview, of max. 1 hour, with the OETers with whom they’ll work most closely.
7. Bonus round -  there may be a short written assignment, depending on the role.
8. The chosen candidate will be provided with an offer letter, and opportunity to ask any questions.
9. Onboarding with our People Team begins.
10. Your start date arrives!

➡️ How to Apply

If you're excited to bring clarity and efficiency to the chaos of the lives of our senior leadership team, we’d love to hear from you! Please submit an application via Greenhouse (our ATS). All applications are reviewed in there. If you have any questions about OET or the role, we’d be happy to answer them should we invite you to take part in a screening call or interview.

Before you apply, please ensure that you are a fit for all the mandatory requirements for this role.

Please note that due to the volume of applications we receive, we are not able to respond to individual emails or LinkedIn requests. Kindly submit your application via Greenhouse, and we will shortlist and reach out to candidates.

If you have not received a response within 2 weeks of submitting your application, please consider it unsuccessful at this point in time. We may, however, still reach out in future. Our team maintains Talent Pools, containing candidates shortlisted for contact for future roles that may arise.

We look forward to meeting the next person who will become an invaluable part of our team! Thank you for your time, and for considering joining OET.

If this role is not for you, feel free to check back later for any future positions that may have been posted.

🌍 Marketing & Content Design Specialist for Climate Tech (Africa | Remote | English)

Location: Fully Remote;
Employment Type: Full-Time Employment
Languages Required: English (proficient)
Experience Required: 5+ years
Salary Range: EUR 15,000 – 25,000 gross per annum (depending on experience)
Reports to: Harry van der Weijde, Head of Research & Market Development
Start Date Goal: 1 May 2026 or sooner (please let us know if you have a notice period)

🧭 About Us

We’re a remote-first, mission-driven, registered non-profit, comprising around 50 highly-skilled and motivated professionals from all around the world! Our culture is built on trust, autonomy, and collaborative professionalism.

Open Energy Transition (OET) is a non-profit organization, advancing the global energy transition by developing innovative open-source tools and data solutions for energy and grid planning. Our vision is to make open approaches the global standard by 2030, enabling energy planning that is more accessible, transparent, and effective.

We’re now looking for a Marketing & Content Design Specialist to join our growing team and professionalize our external visibility. This is an opportunity to take ownership of high-impact design and communication work in a mission-driven, autonomous, and fully remote company.

To learn more about OET and our team, you can visit our website, and browse around our Handbook.

🎯 About the Role

We’re looking for a Marketing & Content Design Specialist to help bring our brand and communications to life as we grow. Working within the Marketing Team, you’ll play a key role in executing how we show up across channels.

You’ll refine and scale our visual identity to ensure consistent, high-quality branding, and create compelling assets for campaigns, partnerships, and product launches. Alongside this, as part of the Marketing Team you write and develop content for our website, social media, and other communications, helping translate complex ideas into clear, engaging narratives. You will also be co-leading campaigns and tracking our success across channels.

This is a hands-on role with a lot of ownership, ideal for someone who enjoys combining design and storytelling to support a mission-driven organisation.

We’re all about transparency, and want to give you the best possible opportunity to prepare for any potential interviews. To learn a bit more about the people you’ll be working most closely with, click here:

Our Head of Research and Market Development, Harry van der Weijde, Our Head of People, Quintin Coetzee, and Our Marketing Lead, Charlotte Heikendorf.

Please note that this is a permanent, work-from-home position as a Full-time employee. No work travel is required. 

🛠️ Key Responsibilities

• Design System: Refine, maintain, and scale a cohesive design system to ensure consistency, efficiency, and high-quality design across product, brand, and communications.
• Graphic Design: Produce compelling templates and visuals for reports, presentations, marketing campaigns, social media, planning docs, and more.
• Content Creation: Write and develop content for social media, website pages, and marketing materials, translating complex topics into clear, engaging narratives tailored to different audiences.
• Campaign & Communications Support: Work closely within the Marketing Team to execute campaigns and communications across channels, including social media accounts, Google Ads, our CRM system (Hubspot), etc.
• (Ideally) Web Design: Create and iterate on web page layouts, and graphics for our digital platforms, based on our design system. Design new websites for future projects. Work closely with our Software Engineers, and make their jobs easier by facilitating automation of design system implementation.

🖼️ Our Design Language (Please review before applying)

For examples of existing design work completed by and for OET, please refer to the links below. Your work would extend, and improve upon, our existing documents, website, graphics, and so on. Please only apply for this role if you believe your work experience and skills would complement our existing publications, website, design language, etc.

• https://zenodo.org/records/15006926 
• https://openenergytransition.org/ 
• https://powernetzero.org/ 
• https://openenergybenchmark.org/
• https://open-esm-analysis.streamlit.app/ 
• https://www.linkedin.com/company/open-energy-transition

✅ You’ll Be a Great Fit If You Have...

• True passion for our mission: enabling better, faster and trusted decisions in the energy transition.
• A "builder" mentality: you are comfortable working independently in a fast-paced environment and are eager to apply your skills to build something new.
• Minimum 5 years of professional experience in a Marketing and Design role
• Proven experience with, among other things:
• Copy writing on complex technical topics
• Design system development
• Corporate branding and identity
• Graphic design for print and digital
• Presentation and publication design
• Marketing Campaigns & Ads
• Experience working with Figma, and the Adobe Creative Cloud (we will consider equivalent design software, so long as it meets the role’s output requirements)
• Fluency in English (written and verbal). Other languages are a bonus
• A portfolio (PDF or link), showcasing your work is required. This may also be an Instagram or other social media account, so long as it's broad enough and representative of what you can do.

A university degree is not required—your experience, communication skills, and work ethic matter most. However, if you happen to have a degree in design/marketing or a similar field, that may be considered a bonus.

✨ What We Offer

• A flexible, fully-remote work environment where you’re trusted to work very autonomously. Zero micro-management, as that goes against our culture.
• The opportunity to support hardworking, passionate, busy leaders who value and respect your contributions, and are working to create positive societal change in the energy sector.
• A culture that values transparency, empathy, trust, humility, diversity, collaboration, and recognition.
• We have an open-door policy, and value reciprocal feedback. You’ll always know where you stand, and always have the ability to have your voice heard, simply by reaching out.
• A pretty flat hierarchical structure, where titles are not emphasized, and all contributions are valued.
• Competitive salary with growth potential. Any relevant benefits depend on your region of residence.
• Supportive onboarding and training, tailored to your strengths, interests, and career ambitions.
• The ability to be part of our formation! We’re still growing, changing, and improving. Anyone who is part of our team now is able to meaningfully contribute towards our culture, and processes. We’re open to all suggestions, and take them seriously!

📝 What Our Hiring Process Entails

We take hiring seriously, and want to bring on candidates who will contribute positively towards our culture just as much as they will succeed in their roles.

Also, we don’t only want to have good outcomes from you. We also want you to feel happy and fulfilled in your position. That means we have a structured process to determine best fit. Our hiring process is as follows:

1. Candidates apply via Greenhouse, and include as much information as possible and comfortable.
2. Various team members of OET will shortlist candidates in our ATS.
3. Certain shortlisted candidates will be contacted to arrange a screening call.
4. Screening calls are conducted, and feature a max. 30 minute chat with our People Team.
5. Certain candidates will go through to a first-round interview, of max. 1 hour, with our People Team. This interview will screen for a combination of competency and culture fit.
6. Finalists will go through to a second-round interview, of max. 1 hour, with the OETers with whom they’ll work most closely.
7. Bonus round -  there may be a short written assignment, depending on the role.
8. The chosen candidate will be provided with an offer letter, and opportunity to ask any questions.
9. Onboarding with our People Team begins.
10. Your start date arrives!

➡️ How to Apply

If you're excited to improve upon the design work of an impactful, growing, global non-profit organization, feel free to apply! We’d love to consider you for this role.

Please submit an application via Greenhouse (our ATS), and include the following:

1. Your CV (in English), including information about prior work and education, and current skills
2. A link to your portfolio, showing examples of relevant design work. This is mandatory
3. A short cover letter explaining why this role is a great fit for you, and why our mission excites you (please add a bit of personality if you wish)
4. A link to your LinkedIn profile, and any other social profiles you wish to include
5. Any relevant written references or testimonials (optional, but appreciated, and may give your application a boost)
6. Your gross salary expectations, annually, in Euros (EUR). Please only apply if it is within the range posted in this ad
7. Your notice period/available start date
8. Any special needs requirements that may apply

If you have any questions about OET or the role, we’d be happy to answer them should we invite you to take part in a screening call or interview.

Please note that due to the volume of applications we receive, we are not able to respond to individual emails or LinkedIn requests. Kindly submit your application via Greenhouse, and we will shortlist and reach out to candidates. If you have not received a response within 3 weeks of submitting your application, please consider it unsuccessful at this point in time. We may, however, still reach out in future. Our team maintains Talent Pools, containing candidates shortlisted for contact for future roles that may arise.

We look forward to meeting the next person who will become an invaluable part of our team! Thank you for your time, and for considering joining OET. If this role is not for you, feel free to check back later for any future positions that may have been posted.

🌍 Infrastructure Planning Expert (Europe | Remote | English)

Location: Europe, Ideally Based in or Willing to Relocate to Brussels, Belgium
Employment Type: Full-Time
Languages Required: English proficiency, other languages an advantage
Experience Required: As below
Salary Range: EUR 70k to 90k gross per annum, based on experience
Reports to: Project Director, ESM
Works Closely With: Energy System Modelers
Work Travel Requirements: Some
Start Date Goal: Late 2025/Early 2026 (TBD)

🧭 About Us

We’re a remote-first, mission-driven, registered non-profit, comprising around 50 highly-skilled and motivated professionals from all around the world! Our culture is built on trust, autonomy, and collaborative professionalism.

We thrive in a fast-paced, distributed environment, where communication is clear, empathy is second nature, and each of us takes full ownership of our work. We work independently, but also collaborate easily when appropriate. Open Energy Transition (OET) is a non-profit organisation advancing the global energy transition by developing innovative open-source tools and data solutions for energy and grid planning.

Our vision is to make open approaches the global standard by 2030, enabling energy planning that is more accessible, transparent, and effective. This shift is essential to better guide trillion dollar worth public and private investment toward affordable, sustainable, and secure energy systems. This is not a distant aspiration; our work is already being adopted by leading system operators, regulators, and philanthropic partners.

We are seeking an Infrastructure Planning Expert to join our innovative team.

To learn more about OET and our team, you can visit our website, and browse around our Handbook.

🎯 About the Role

As an Infrastructure Planning Expert, you would support OET in aligning open-source energy modelling tools and project outcomes with the planning and decision-making needs of Transmission System Operators (TSOs), or equivalent institutions.

Language proficiency in English is required.

A willingness to relocate to a Brussels office is preferred.

We’re all about transparency, and want to give you the best possible opportunity to prepare for any potential interviews. To learn a bit more about the people you’ll be working most closely with, click here:

1. Project Director, ESM (aka your future Manager), Lisa Zeyen

🛠️ Your Key Responsibilities

• Advise OET on how TSOs and regulators integrate long-term energy planning into operational and investment decisions.
• Bridge the gap between open-source modelling tools and internal planning workflows of TSOs.
• Provide insight into how capacity expansion and production-cost models inform infrastructure planning and adequacy studies.
• Identify institutional “systems of change” within TSOs, including processes and regulatory oversight relevant for model adoption.
• Support the design of capacity-building sessions and documentation to align OET products with TSO analytical needs.
• Contribute to internal knowledge transfer by mentoring OET staff on TSO processes, decision frameworks, and policy drivers.
• Participate in stakeholder engagement with TSOs, regulators, and system-planning bodies across regions.

✅ You’ll Be a Great Fit If You Are/Have...

• 7+ years minimum experience required in a Transmission System Operator, system planning consultancy, or regulatory body overseeing power system transformation.
• Demonstrated experience in energy planning, capacity expansion, or production-cost modelling.
• Familiarity with the interaction between long-term system studies and regulatory or investment processes.
• Strong understanding of decarbonization pathways, system flexibility, and cross-sectoral integration.
• Excellent communication skills and ability to translate between technical modelling and organizational decision-making.
• Bonus points if you’ve worked at a TSO, at a startup, or in the general energy sector before
• Bonus points if you're already located in, or are willing to relocate to Brussels, Belgium
• Fluency in English
• Thrive in a highly self-managed, remote, transparent work culture, where you don’t wait around to be told what to do by your manager but show initiative and ownership, and where you give and receive honest feedback to help all, regardless of their role, grow and develop

✨ What We Offer

• A truly flexible work environment where you’re trusted to work very autonomously. Zero micro-management, as that goes against our culture.
• The opportunity to support hardworking, passionate, busy leaders who value and respect your contributions, and are working to create positive societal change in the energy sector.
• A culture that values transparency, empathy, trust, humility, diversity, collaboration, and recognition.
• We have an open-door policy, and value reciprocal feedback. You’ll always know where you stand, and always have the ability to have your voice heard, simply by reaching out.
• A pretty flat hierarchical structure, where titles are not emphasized, and all contributions are valued.
• Competitive salary with growth potential. Any relevant benefits depend on your region of residence.
• Supportive onboarding and training, tailored to your strengths, interests, and career ambitions.
• The ability to be part of our formation! We’re still growing, changing, and improving. Anyone who is part of our team now is able to meaningfully contribute towards our culture, and processes. We’re open to all suggestions, and take them seriously!

📝 What Our Hiring Process Entails

We take hiring seriously, and want to bring on candidates who will contribute positively towards our culture just as much as they will succeed in their roles.

Also, we don’t only want to have good outcomes from you. We also want you to feel happy and fulfilled in your position. That means we have a structured process to determine best fit. Our hiring process is as follows:

1. Candidates apply via Greenhouse, and include as much information as possible and comfortable.
2. Various team members of OET will shortlist candidates in our ATS.
3. Certain shortlisted candidates will be contacted to arrange a screening call.
4. Screening calls are conducted, and feature a max. 30 minute chat with our People Team.
5. Certain candidates will go through to a first-round interview, of max. 1 hour, with our People Team. This interview will screen for a combination of competency and culture fit.
6. Finalists will go through to a second-round interview, of max. 1 hour, with the OETers with whom they’ll work most closely.
7. Bonus round -  there may be a short written assignment, depending on the role.
8. The chosen candidate will be provided with an offer letter, and opportunity to ask any questions.
9. Onboarding with our People Team begins.
10. Your start date arrives!

➡️ How to Apply

If you're excited to bring clarity and efficiency to the chaos of the lives of our senior leadership team, we’d love to hear from you!

Please submit an application via Greenhouse (our ATS), and include the following:

1. Your CV (in English), including information about prior work and education, and current skills
2. A short cover letter explaining why this role is a great fit for you (please add a bit of personality if you wish)
3. A link to your LinkedIn profile, and any other social profiles you wish to include
4. Any relevant written references or testimonials (optional, but appreciated, and may give your application a boost)
5. Your gross salary expectations, annually, in Euros (EUR). A range is specified in this job posting
6. Your notice period/available start date (the sooner the better for us)
7. Any special needs requirements that may apply

If you have any questions about OET or the role, we’d be happy to answer them should we invite you to take part in a screening call or interview.

Please note that due to the volume of applications we receive, we are not able to respond to individual emails or LinkedIn requests. Kindly submit your application via Greenhouse, and we will shortlist and reach out to candidates.

If you have not received a response within 3 weeks of submitting your application, please consider it unsuccessful at this point in time. We may, however, still reach out in future. Our team maintains Talent Pools, containing candidates shortlisted for contact for future roles that may arise.

Deadline to apply: None (ongoing, so long as this role is live on our website)

We look forward to meeting the next person who will become an invaluable part of our team! Thank you for your time, and for considering joining OET.

If this role is not for you, feel free to check back later for any future positions that may have been posted.

🌍 Proactive Job Application: Energy System Modeler (Global | Remote | English)

Location: Remote | Global Opportunities Available
(While we are incorporated in Germany, we are remote, and open to applicants from everywhere)
Type: Open to Various Contract Types
Sector: Non-Profit | Energy Transition

About Open Energy Transition

Open Energy Transition is a non-profit organization dedicated to accelerating the global energy transition through innovative open-source energy planning solutions. We are a team of passionate individuals committed to creating a sustainable future by enabling accessible, effective, and transparent energy management tools. More info at our website.

Why Apply Proactively?

At Open Energy Transition, we value initiative and creativity. We recognize that exceptional talent may not always align with our posted roles but can make significant contributions to our mission.

By submitting a proactive application, you give us the opportunity to consider your skills, experience, and cultural alignment for future roles.

Who Should Apply?

We encourage applications from individuals who:

• Are deeply passionate about advancing the global energy transition.
• Have expertise in areas such as energy modeling, data analysis, or other fields relevant to our mission.
• Thrive in a collaborative, flexible, and mission-driven environments, with a flat hierarchy, and lots of collaboration across fully remote teams and different cultures.

What We Look For

When reviewing proactive applications, we consider:

• Relevant skills, experience, and/or projects that align with our mission and goals.
• Demonstrated initiative, adaptability, dedication, self-management, and teamwork (including cross-functional collaboration).
• A clear connection to Open Energy Transition’s vision and values (which you can learn more about on our website).
• Having worked in a fully remote role before is a bonus (our team members are based all around the world - mainly in the EMEA region).

We also value the diversity of our team. OET is open to applicants from all backgrounds, cultures, regions, and language groups. If you require any special accommodations during hiring or work, please let us know when applying.

Individuals from both commercial and academic environments will be considered.

Next Steps

Please note: applying via the proactive posting does not mean you will be contacted. We only reach out to proactive applicants if a suitable role arises, and we wish to proceed with screening calls.

Your application will be reviewed and kept in our ATS. We may add certain individuals to specific Talent Pools for future consideration. 

Should an opportunity arise that aligns with your skills and interests, we will reach out to explore next steps.

Join us in shaping a sustainable future. We look forward to learning more about you!