ZeroAvia is leading the transition to zero-emission aviation through the development of hydrogen-electric propulsion systems for civil and defence aerospace applications. As the world's only Design Organization Approved business focused exclusively on hydrogen-electric aviation, we have achieved significant flight test and regulatory milestones with the UK CAA and FAA and secured more than 3,000 pre-orders from airlines, OEMs and defence customers globally. Joining ZeroAvia means being part of a team pioneering the future of aviation and delivering lasting impact for the planet and its people.

As ZeroAvia scales its hydrogen-electric propulsion programmes, the Fuel Cell Systems Engineer will play a key role in transforming fuel cell technology into a fully integrated, certifiable aerospace product. Working across system architecture, requirements, interfaces and validation activities, you will bridge the gap between component technologies and aircraft-level integration. This role offers the opportunity to solve complex engineering challenges, collaborate across multiple disciplines and help deliver the systems that will enable safe, reliable and commercially viable zero-emission flight.

Requirements

Responsibilities:

• Lead supplier management and development activities for LTPEM fuel cell systems, ensuring timed delivery, quality, and compliance with programme requirements.
• Act as the technical expert for LTPEM fuel cell, providing subject matter expertise and supporting design reviews for interfaces and balance-of-plant fluid systems.
• Support the test team in diagnosing, troubleshooting, and resolving fuel cell system performance issues during development and validation testing.
• Own and maintain fuel cell system documentation, including technical requirements, interface definitions, compliance evidence, and supporting design documentation.

Key requirements:

• Understanding of PEM fuel cell electrochemistry, including key operating principles, performance drivers, and limitations.
• Experience integrating PEM fuel cell stacks into complex systems, ideally for transport or aerospace applications, with practical experience resolving integration challenges.
• Experience analysing PEM fuel cell test data to assess stack health, performance, degradation trends, and failure indicators.
• Experience developing and managing requirements for aerospace (or similar) systems, hardware, or safety-critical products
• Experience applying operational and functional analysis to the development of fuel cell systems, electric propulsion systems, or related products.

Desirable skills:

• Experience using engineering tools such as LabVIEW, Polarion, and DIAdem.
• Expertise in ARP4754B requirements processes, including requirements capture, validation, decomposition and traceability.
• Experience with Teamcenter PLM or similar systems.

Benefits

Why Join Us? 

We want to help you be your best self, at work and at home, that’s why we provide our employees with… 

• Private health and dental care – get access to services and support when you need them. Add your family members too.
• Mental health support – enjoy a culture where positive mental health is front of mind with our trained Mental Health First Aiders, Employee Assistance Programmes and wellbeing support. 
• Free lunch and healthy snacks – keeping you fuelled up so you can help us deliver the technology of the future** 
• Sports, games and culture clubs – connect and keep fit with other ZeroAvians by joining one of our clubs – such as, running, cycling, padel, trivia, theatre and gardening. 

We also offer:  

• Stock options – so you can share in our success. 
• 25 days holiday, plus public holidays and additional days awarded for long service – to help you manage your work-life balance.
• Free EV Charging and membership in our EV Club. 
• Salary Sacrifice Schemes for EV Club, Curry's Tech and Cycle to Work
• Weekly Spot Bonuses to reward excellence. 
• Income Protection and Legal Support for peace of mind. 
• Relocation Support to make your move seamless.

Diversity and Inclusion

As an emergent company shaping the aviation industry, we know that diversity fuels success and unlocks potential. We embrace being an equal-opportunity employer and actively seek individuals from diverse backgrounds. We value the multitude of skills, perspectives, and mindsets everyone can bring to the table. These experiences ignite creativity, originality, and growth. We proudly reject discrimination in all forms, including that based on race, religion, color, national origin, sex, gender expression, sexual orientation, age, marital status, veteran status, or disability status.