About H-55

As the technological spin-off of Solar Impulse, the first electric airplane to fly around the world, the mission of H55, is to make aviation clean, safe, and affordable.

The company’s strengths and competencies lie in developing propulsion and energy storage solutions which are modular, lightweight, and certifiable.

H55 is financed by a reputable group of investors from Silicon Valley and Switzerland, and as such, is well positioned for its next stage of its development. The company’s short-term priorities include building up out of engineering team, putting into place production facilities, and creating a north American subsidiary.

About the role

As the Electrical Storage System (ESS) System Engineer, you will be responsible for the system definition from design to entry in service. You will also support the upper level  system like Electric Propulsion System (EPS) for next-generation aircraft, ensuring compliance with EASA, FAA, and CS-23 safety and certification standards.

Your Key Responsibilities

• System Design and Architecture: Define and update the system architecture, requirements, and interfaces based on upper-level requirements, including certification and safety considerations.
• Compliance and Verification: Provide analysis, test procedures, and compliance evidence for certification standards such as DO-160, DO-254, ARP4754A, and more.
• Aircraft/System Integration: Support aircraft-level integration activities, including creating and updating technical manuals.
• Engineering Deliverables: Prepare and update reports, analyses, and test procedures to meet development and certification requirements under EASA Part 21 and FAA standards.
• Electrical Network Analysis: Analyze the electrical network of cutting-edge propulsion systems to optimize performance and ensure reliability.
• Testing and Validation: Conduct bench, ground, and flight tests of electric propulsion systems to validate performance and compliance.
• Basic Electrical Load Analysis (ELA): Perform ELA to ensure system stability and adherence to certification requirements.

• Bachelor’s degree or higher in Systems Engineering, Aerospace Engineering, Power Electronics, or related fields.
• 5+ years of experience in system-level engineering, particularly in Electrical Storage Systems (ESS) or Power Electronics for safety-critical industries (e.g., aerospace, automotive, rail).
• Familiarity with aviation standards such as DO-160, DO-254, ARP4754A, ARP4761, and DO-178C. Equivalent standards in automotive, medical, or rail industries are also considered.
• Solid understanding of EASA Part 21, CS-23, and other certification principles.
• Experience with safety analyses such as FMEA, SSA, and metrics like MTBF/MTTR.
• Knowledge of EMI/EMC compliance is a plus.
• Knowledge in Energy storage, batteries & DO-311 is a plus
• Hands-on experience with system integration and Verification and Validation (V&V) processes, including HIL, SIL, and flight test environments.
• Familiarity with electronic communication protocols, interface documentation (ICD), and electrical load analysis (ELA).
• Strong technical writing skills, with experience creating test plans, certification artifacts, and technical documentation.

• Target-oriented with strong problem-solving skills and a proactive, innovative approach.
• Well-organized, with excellent time management and multitasking abilities.
• Hands-on on documentation and agile on fast tempo
• Passion for continuous learning and knowledge sharing within a collaborative team environment.

• Fluent in English (oral and written); proficiency in French is a plus.

Sounds interesting? We look forward to meeting you!

At H55, you will work with a very forward-looking team who are changing the paradigms of air transportation. H55 is composed of highly experienced engineers, entrepreneurs and managers and is seeking like mind talented professionals who understand how to couple creativity and innovation with technical and business considerations.

H55 is an equal opportunity employer and welcomes applications from all qualified individuals regardless of nationality, sex, disability, religion/belief, sexual orientation or age. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on competence, performance, and business needs.