H55 SA

Senior Electrical Hardware Engineer (Consulting) - CH About H55 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. Having integrated and flown 4 electric airplanes, the Swiss start-up has been selected by Pratt & Whitney Canada to provide the battery pack for its regional hybrid-electric flight demonstrator. This recent announcement is a further illustration of H55’s position as a major enabler in the electric commuter market. Your Role As a Senior Electrical Hardware Engineer (Consultant), you will take a technical leadership role in the development, verification, and documentation of Electronic Control Board Assemblies (ECBA) for our Energy Storage System (ESS). You will operate under EASA Part-21J regulations, contributing to certification deliverables with a strong focus on compliance to standards such as: SAE ARP4754A – System Development Lifecycle SAE ARP4761 – Safety Assessment for Aircraft Systems RTCA/DO-254 – Design Assurance for Airborne Electronic Hardware RTCA/DO-160 – Environmental Testing AMC 20-152, RTCA/DO-178, DO-331 – As applicable for systems interaction and V&V alignment ASTM F3230 – Electronic Parts Qualification Key Responsibilities Design Ownership & Technical Leadership Define and review Board-Level Requirements with full traceability to system functions and safety objectives Guide the development of mixed-signal circuits including power supplies, protections, sensing, and control interfaces Support or lead preliminary and critical design reviews (PDR/CDR) Documentation & Compliance Produce and review technical documentation including: Design Descriptions, Functional Block Diagrams, and Interface Control Documents (ICDs) Design Analysis Reports (e.g., Worst Case Analysis, Error Budget, Timing, Power Dissipation) Verification & Validation Plans (VTP, VTPR) aligned with ARP4754A / DO-254 Perform peer reviews and sign-off on engineering documents as per DOA procedures Ensure all development data complies with DO-254, internal configuration control, and certification audit expectations Contribute to safety documentation such as Failure Modes and Effects Analysis (FMEA) and Hardware Development Plans Verification, Test & Certification Support Define and support Verification Test Procedures (VTP), Qualification Test Procedures (QTP), and ATP (Acceptance Test Procedures) Ensure compliance with DO-160 environmental testing including vibration, temperature, EMI/EMC Participate in SOI audits and interface with certification authorities on behalf of the hardware function Support integration and troubleshooting of boards during system testing and environmental qualification Team Contribution & Mentorship Provide technical mentorship to hardware team members and promote a culture of excellence in documentation and analysis Review the team’s schematics, PCB layouts, and test reports Support the development and maintenance of checklists, guidelines, and standards used throughout the ECBA lifecycle Promote best practices aligned with ARP4754A and model-based/system engineering principles (DO-331) Your Profile Education & Experience Bachelor’s or Master’s degree in Electronics, Electrical Engineering, or a related discipline Minimum 7–10 years of experience in high-reliability electronic hardware development (aerospace, automotive, industrial, or medical) Strong experience with DO-254-based development lifecycles, ideally in certified programs Technical Expertise Deep knowledge of analog/digital hardware design, including filtering, protection, power supply design (DC/DC), and measurement systems Proficient in circuit analysis, simulation (SPICE or Simetrix), and EMI/EMC mitigation Skilled in ECAD tools (Altium Designer preferred) for schematic capture and PCB layout Fluent in reading and producing engineering documentation, specifications, and test procedures Experience working with aerospace qualification and development standards: SAE ARP4754A, ARP4761, DO-254, DO-160, AMC 20-152, ASTM F3230 Awareness of DO-178, DO-331 for multidisciplinary integration Soft Skills & Consulting Mindset Strong analytical thinking, with a structured and rigorous approach to engineering problem-solving Excellent communication and documentation skills, with an ability to present clearly to internal and external stakeholders Demonstrated ability to work independently and act as a technical authority Fluent in English (oral and written); French is an advantage Why Join H55 (as a Consultant)? Work on cutting-edge energy storage technologies at the core of tomorrow’s aircraft Bring your aerospace experience to a mission-driven, fast-paced environment Collaborate within a culture built on TRUST, TEAMWORK, COURAGE, and PERSEVERANCE Help shape the certification and engineering excellence of next-gen clean aviation systems What we offer An amazing work Location in Sion, Valais in the heart of Swiss Alps. 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. H55 is an equal opportunity employer and welcomes applications from all qualified individuals regardless of race, 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.

A Swiss company created in 2017 by the leadership team of Solar Impulse, André Borschberg, Sebastien Demont, and Gregory Blatt, H55 has accumulated design, development, certification and electric flight experience. Its proven track record in developing electric propulsion, battery packs and battery systems comes from having worked on and flown 2 Solar Impulse airplanes, the Twister Aero1 acrobatic aircraft, and the Bristell Energic.., , At H55, you will work with a very forward-looking team who are changing the paradigms of air transportation. H55 is composed of highly skilled and talented engineers, entrepreneurs and managers, all like-minded professionals who understand how to how technological innovation can make air transportation cleaner, safer and affordable Senior Software Verification engineer Within a multi-disciplinary team, you will be responsible for leading the testing activities to meet the required needs, safety and reliability objectives Its a senior role with strong leadership skills. You will report directly to the Software Team Le Lead an automated, scalable verification strategy, integrated with CI/CD pipelines and aligned with DO-178 objectives Develop test cases and execute reusable test procedures, leveraging model-based design and automation Set up and manage test environments, tools, test benches for various level of testing from software unit tests up to system component testing Perform various analysis, like requirements coverage, structural coverage analysis, WCET evaluations Contribute to tool qualification and automated generation of traceability, coverage, and verification results reports Build verification dashboards and track real-time metrics to monitor quality and progress Actively participate in life-cycle data reviews Manage day-to-day activities with verification supplier Your Profile: 7+ years of experience in safety-critical aerospace software verification, with a strong focus on DO-178C / DO-331 / DO-330 Proven expertise in software requirement-based testing, experience in system verification processes is a plus Hands-on experience with target-based verification environments, including Speedgoat and NI PXI platforms Proficient in Python and C for embedded development Experience integrating verification tasks into Jenkins CI/CD pipelines Familiarity with MathWorks toolchain, including Simulink Test, Simulink Coverage, Polyspace Practical experience with Rapita toolchain: RapiTest, RapiCover Skilled in authoring and evolving software processes, plans and standards aligned with certification requirements Strong problem-solving mindset, able to deliver in a fast-paced, target-driven environment Excellent organizational skills with a focus on automated reporting and efficient documentation practices Fluent in English; French is a plus What we offer An amazing work Location in Sion, Valais in the heart of Swiss Alps 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 offer a position which contributes to valuable and impactful work in a stimulating and international environment H55 is an equal opportunity employer and welcomes applications from all qualified individuals regardless of race, 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 Required Attach resume file

Join our Talent Pool - General Application About H55 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. Having integrated and flown 4 electric airplanes, the Swiss start-up has been selected by Pratt & Whitney Canada to provide the battery pack for its regional hybrid-electric flight demonstrator. This recent announcement is a further illustration of H55’s position as a major enabler in the electric commuter market. Interesting to join us? Do you have experience in Electric Propulsion or Aerospace that may suit any of the wide range of roles below? Electrical Engineer Power Electronics Engineer Battery Design Certification Engineer Safety & Quality Thermal Engineer Manufacturing System Design Propulsion Engineer We have new positions coming up regularly and are always looking for great people to join the team. Help us get to know you by telling us about your passion for our company, your ambitions, and the kind of work environment which would help you truly thrive. The more we know, the better we'll be able to connect you with relevant opportunities as they arise in our team! Please also attach your CV. Sounds Interesting, we look forward to meeting you! H55 is an equal opportunity employer and welcomes applications from all qualified individuals regardless of race, 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.

A Swiss company created in 2017 by the leadership team of Solar Impulse, André Borschberg, Sebastien Demont, and Gregory Blatt, H55 has accumulated design, development, certification and electric flight experience. Its proven track record in developing electric propulsion, battery packs and battery systems comes from having worked on and flown 2 Solar Impulse airplanes, the Twister Aero1 acrobatic aircraft, and the Bristell Energic.., , At H55, you will work with a very forward-looking team who are changing the paradigms of air transportation. H55 is composed of highly skilled and talented engineers, entrepreneurs and managers, all like-minded professionals who understand how to how technological innovation can make air transportation cleaner, safer and affordable About H55 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 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 Your Role Reporting to the CFO , you will play a key role in providing the tools and support needed to accelerate accounting and internal control activities Take ownership of accounting activities and ensure accuracy and efficiency Prepare quarterly closing and financial reporting including consolidation of multiple entities Lead yearly financial audit process including liaison with external parties (e.g. auditors) Support yearly budget process and budget revisions, including coordination with cost center managers Support business finance initiatives such as: Product costing deployment & updates RFP/RFQ and pricing proposals Cost reduction initiatives & cash runway extension experience At least 5 years’ experience in Financial Controlling, Audit, Financial Reporting, large accounting firm experience is a real plus Bachelor or Master’s degree Accounting, Finance or Economics Accounting qualification completed or in progress (ACCA, CPA, Brevet Fédéral) Excellent knowledge of Swiss GAAP, knowledge of IFRS/US GAAP is a strong asset Strong analytical- and business acumen skills, with ability to prioritize, manage time effectively and multi-task Excellent communication skills, verbal an written with ability to prepare reports and present information Thrive in a fast pace start-up environment Autonomous and solution oriented Excellent command of MS office with advanced skills in Excel Experience in operating an ERP Fluent in both French and English, any other language is a plus What we offer An amazing work Location in Sion, Valais in the heart of Swiss Alps A highly dynamic and multicultural environment where you can grow and learn by working on ambitious challenges to shape the future of Electric Aviation 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 Required Attach resume file