About H55
As the technological spin-off of Solar Impulse, the first electric airplane to fly around the world, H55's mission is to make aviation clean, safe, and affordable.
Our core expertise lies in the development of certifiable electric propulsion and energy storage systems that are modular, lightweight, and optimized for integration into future air mobility platforms. Headquartered in Sion, Switzerland, and backed by global investors from Silicon Valley and Europe, H55 is entering its next growth phase: ramping up product industrialization, building a North American presence, and certifying next-generation systems.
At H55, you will join a forward-thinking team pioneering the future of electric flight. We are seeking curious and committed professionals ready to turn innovation into real, certifiable aerospace solutions.
Your Role:
As an Electrical Engineer within our EASA Part 21 Subpart J Design Organization (DOA), you will be responsible for the design, development, and certification of Line Replaceable Units (LRUs) such as Electronic Control Board Assemblies (ECBA) and other Airborne Electronic Hardware (Hardware /ECBA) for our Electric Propulsion System (EPS).
Working within the Electrical team, you will ensure all design activities follow DO-254, CS-23, ARP4754A, and related standards, supporting all Means of Compliance (MoC) and regulatory deliverables in cooperation with our internal Certification, Safety, and Systems Engineering teams.
Your Responsibilities
- Requirements and Certification Planning
Define Requirements as per DO-254 and ARP4754A.
Create and maintain the Plan for Hardware Aspects of Certification (PHAC), Configuration Management, Analysis & Simulation report, Safety analysis
Ensure alignment of activities with Development Assurance Levels
- Hardware Development Lifecycle
Execute the full lifecycle: Requirements Capture, Conceptual Design, Detailed Design, Implementation, Verification, Validation, and Process Assurance
Utilize Altium Designer while producing Drawing (DWG) or Schematics (SCH) if required
Ensure traceability using CodeBeamer (or equivalent, e.g., DOORS).
Manage interface while producing Interface Control Document (ICD)
Perform Peer Reviews, Design Reviews, and Power/Signal Integrity Analysis.
- Certification & Compliance
Ensure compliance with EASA CS-23, DO-254, and DO-160G.
Contribute to the generation of Hardware Accomplishment Summaries (HAS) and support CVE in defining Means of Compliance.
Coordinate and support EMI/EMC, ESD, Lightning Induced Transients and Power Input qualification testing.
Support Verification & Qualification Test Procedure
- Coordination & System Integration
Collaborate with Systems Engineers (SYS), Software Engineers (DO-178C), Safety Analysts (FTA/FMEA/SSA), and Certification Engineers.
Support consistency with ARP4761 safety assessments and proper DAL assignment.
Support integration of hardware items into the broader Electric Propulsion System architecture.
- Configuration & Quality Management
Maintain the Hardware Configuration Index (CIDX)
Participate in Change Control Boards (CCBs) and manage Problem Reports (PRs).
Ensure alignment with internal DOA processes and quality assurance standards.
Your Profile
Education:
Bachelor's or Master’s in Electrical Engineering, Avionics, Aerospace Engineering, or equivalent.
Experience:
5+ years in AEH/ECBA development under DO-254 within a certified EASA 21J Design Organization or equivalent.
Proven experience in EASA certification or TCCA/FAA environments.
Tools & Technical Skills:
Proficient in Altium, Mentor Graphics, or equivalent ECAD tools
Requirements management with CodeBeamer, Polarion, or DOORS
Familiarity with DO-160G, ARP4754A, ARP4761, and AMC 20-152A
Preferred:
Exposure to DO-178C, TSO/ETSO, or software/hardware interface integration
Understanding of Part 21G manufacturing and conformity inspection processes
Soft Skills:
Organized, communicative, team-oriented
Strong decision-making and trade-off analysis skills
Fluent in English (oral/written), French is an asset
What We Offer
We offer a highly dynamic and multicultural environment where you can grow and learn by working on ambitious challenges to shape the future of Electric Aviation. We hope this role sounds exciting and could be your next step, if so follow the steps to apply, we are looking forward to receiving your application.
We hope this role sounds exciting and could be your next step, if so follow the steps to apply, we are looking forward to receiving your application.
