The Position * A Mechanical Engineer to play a critical role in the design, development, and optimisation of our electrochemical stack and components for our hydrogen electrolyser products. * You will use analytical, creative, and practical engineering skills to design and develop next generation green electrolysis stacks. * You will focus on engineering developments to improve efficiency and reduce cost as well as support ongoing manufacturing activities. * The successful candidate will be a practical engineer, splitting time between development work and building and running test systems. * Small, dynamic team working environment. Duties and Responsibilities * Design, model, and analyse mechanical components for hydrogen electrolysers. * Develop new test systems and run testing programmes delivering analysis and interpretation of results. * Support prototype development, testing, and troubleshooting, ensuring designs translate effectively into manufacturable products. * Collaborate with suppliers and contractors to ensure component quality and cost-effectiveness. * Contribute to system integration, installation, and maintenance strategies with a focus on durability, safety, and performance. * Prepare technical documentation including drawings, BOMs, specifications, and test reports. * Assist in product fault diagnosis for manufacturing/test issues. * Stay up to date with emerging technologies, materials, and best practices in hydrogen and clean energy applications. * Support other engineering activities as required. Person Specification Knowledge * Bachelor’s or master’s degree in mechanical engineering or a related field. * Good knowledge of mechanical engineering principles. Skills * Excellent communication skills including the ability to convey technical information effectively. * Excellent communication skills including the ability to convey technical information effectively. * Experienced CAD user (SolidWorks preferred). * Strong problem-solving skills, hands-on approach, and attention to detail. * FEA experience desirable. Experience * Minimum 3 years engineering experience. * Experience in the development of mechanical/electromechanical products. * An understanding of risk management (FMEA). * Experience working with high pressure systems is advantageous. * Experience in hydrogen systems, electrolysers, or fuel cell technology is desirable. * Understanding of safety standards related to hydrogen handling and high-pressure systems and HAZOPS experience is advantageous. Applications close: Wednesday 1 October 2025. Informal online conversations: Week commencing 13 October 2025. In person interviews in Bristol: Weeks commencing 20 & 27 October 2025