H55 SA

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 As the you will be part of the Design Organization (DOA PART-21J), and will report to Chief Independent Monitoring. Your main responsibilities will include: Ensure compliance to documented processes and the design organization handbook during the release of deliverables Ensure the required level of quality in deliverables Provide independent assurance that planned life cycle processes and standards are followed throughout the product life cycle through Inspections, random reviews and design reviews for milestones Verify that the product life cycle data complies with the established processes and plans, focusing on the correct application of processes, standards and industry guidelines in projects Proactive participation in product development assuring quality is included as part of design and lessons learned are applied Participation in change control boards (CCB’s) Support the Chief of Independent Monitoring with audits (internal / external) Your profile You have demonstrated ability to operate both strategically and tactically in highly fast changing environment. Specifically, this includes: University degree in Quality, Engineering 3+ years experience in quality, preferably EASA Part 21 subpart J aerospace 3+ years experience of working with AS9100 standards is a plus Knowledge in DO-254 Design Assurance Guidance For Airborne Electronic Hardware, DO-178 Software Considerations in Airborne Systems and Equipment Certification and ARP4754A Development of Civil Aircraft and Systems, is a plus Success in driving operational excellence in quality Analytical, structured, and independent way of working as well as the ability to maintain a macro-overview Excellent problem-solving and analytical skills Fluency in English (oral and written), French is an asset Working knowledge of PLM tools as well as ERP systems Experience of implementing AS9100 an advantage Experience of EASA and Part 21 regulatory requirements in an aerospace approved organisation 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 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 By selecting Allow, you consent to the recording, use and sharing of your website activity by this website and its service providers

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.

Senior Electrical Engineer – DO-254 / Aerospace Longueuil, QC, Canada Full Time Engineering Mid Level About H55As 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 1. 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 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. 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 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. 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 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. Apply for this position Required*

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.

About Us H55 is at the forefront of sustainable aviation revolution. Our mission is to enable the aviation industry to reach net zero by providing certified electric propulsion solutions. The Swiss based H55 is a technological spin-off of Solar Impulse, the first electric airplane to fly around the world. The company develops cutting-edge certified electric propulsion and battery management systems that enable cleaner, quieter, and more sustainable air travel. H55 is driving innovation to accelerate the aviation industry's transition toward zero-emission solutions Joining our team means working with talented professionals and gaining firsthand experience in a dynamic and innovative environment. We value individuals who think outside the box, take initiative, and are passionate about the aerospace industry. Your Role We are seeking a passionate and quick-learning intern to support the development of GUI applications for controlling test systems in Battery Management Systems (BMS) and Electric Propulsion Systems for aerospace applications. Specifically, you will: Design and implement GUI applications in Python for Windows, using frameworks such as Qt (PyQt/PySide) or equivalent. Work with networking protocols (especially UDP) to interface with test systems and devices. Contribute to software process automation using Jenkins, including building dashboards and analyzing KPIs for continuous integration and test workflows. Your Profile Ongoing Bachelor or Master's student in computer engineering Basic knowledge of XML and HTML for data handling and interface configuration. Exposure to graphical tools like Qt Designer, Blender, or other visualization environments. Experience or familiarity with simulation environments using MathWorks toolchain (MATLAB/Simulink) is a plus. Fast learner, rigorous, hands-on problem-solving, ability to document properly. Fluency in English (oral and written). Additional Information Location: Sion, Switzerland Start Date: Summer 2025 Duration: 6 months or longer. 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.

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 comforting its position as a major enabler in the electric aviation market by having integrated and flown 4 electric airplanes, having gained various Canadian customers and the recent announcement of a new facility in Longueuil. About the role In the frame of its product development (Electric Propulsion System and Modular Battery Pack), H55 is searching for a 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 Leader. Main responsabilites: 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 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.