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 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

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. About the role Program Manager is in charge of customer programs which entails both the overall definition and management of the customer offer and ensuring delivery of the product and on-going customer relations. Working closely with the Chief of Sales Marketing and Business Development, the Program Manager contributes tangibly to the overall success of the company. This role is a fixed term contract replacing maternity leave , from around May to February 2026. The tasks of this position include: Understanding and analyzing the technical and business needs of the customer community Conducting technical feasibility studies and build final technical and cost offer Structuring the offer; business modeling, costing and pricing, NRC, RC and depreciation impact Program and project scheduling and deliverables Supporting the Sales Organization in contract negotiations Overseeing and managing execution of the customer order including anticipating delays and implementing program adjustments Taking care of the customer relationship during the execution phase Negotiating and implementing customer changes Using state-the-art program management tools Coordinating the overall capacities of the Company in the event of parallel execution of several contracts/offers in parallel Criteria for success: The ability to manage in a non-hierarchical coordination mode, keeping the Company under delivery pressure is essential for the company’s growth and profitability. As such, the P&L results will be the major factor in evaluating the Jobholder’s personal performance. Your Profile & Experience This role is a fixed term contract replacing maternity leave, from around May to February 2026. University degree in a relevant, ideally engineering, discipline (System Engineering, Aerospace Engineering, Power Electronics, Energy Systems) Competence in management of the economic side of an industrial activity (P&L, cost management, design to cost, …) Demonstrated experience and expertise as project/program manager in the aviation sector typically 5+ years, bringing projects to successful completion Technical / engineering experience in aviation/aerospace with direct client management/ engagement Broad knowledge of other engineering disciplines, HW/SW development, mechanical engineering to assess/coordinate the product development cycle on a high level Good understanding of certification and production methods and standards in aviation Management skills, resources and budget Strong understanding of the company’s key competitive strengths - technology, pricing, manufacturing capabilities, plans to scale, etc. - and being able to use these qualifications for identifying, engaging and increasing the company’s customer base Hands-on execution management Driven by team spirit and transparent cooperative management style Dispose of an entrepreneurial and strategic thinking ability; has a high level of synthesis capacity Illustrates strong customer focus / mind-set Excellent communication skills in English (written and spoken) and if possible, in French and German At ease and comfortable with fast commercially growing small high-tech companies where product and technology offerings still need to be matured and proven in the market. 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.

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 H55 are seeking an experienced and passionate Airworthiness Engineer to manage activities related to maintaining and developing our EASA Part 21 Subpart J Design Organisation Approval. The successful candidate will play a critical role in ensuring the design organisation operates in full compliance with EASA regulations, while leading the continuous improvement of design and certification processes. This is a key position with significant cross-functional influence across engineering, quality, safety, and regulatory affairs Ensure the DOA's continued adherence to EASA Part 21 Subpart J requirements Develop, maintain, and improve DOA procedures, manuals and related documentation Liaise directly with EASA and other regulatory authorities on audits, approvals, and design-related activities Participate and Lead internal and external audits, ensure timely resolution of findings, and implement corrective/preventative actions Support and guide engineering and certification teams in demonstrating compliance with applicable certification requirements (SC E-19/ CS-23/25) Coordinate with cross-functional teams to manage and approve changes to engine, systems, and equipment design Lead or support major design projects, minor/major modifications, and repairs Ensure proper use of EASA Form 1, Form 18B, and other regulatory deliverables as part of the design output Provide training and awareness on DOA Procedures and regulatory updates and best practices across the organisation Your profile You have demonstrated ability to operate both strategically and tactically in highly fast changing environment. Specifically, this includes: Bachelor's or Master's degree in Aerospace Engineering, Mechanical Engineering, or a related technical field 5 years of experience within an EASA DOA environment, with 2 years in an Airworthiness Office Strong understanding of EASA Part 21 Subpart J, relevant CS standards, and airworthiness regulations Experience interfacing with EASA, national aviation authorities, or other certification bodies Excellent communication skills with the ability to interact with stakeholders at all levels Proven leadership, project management, and decision-making skills Knowledge of Safety Management Systems Desirable: knowledge of Electrical System, Battery Systems, Power Electronics or Electric Motors Demonstrated success in working as a team player, capable of interacting with people from diverse backgrounds and skillsets Target-oriented, with analytic problem-solving capabilities Capacity to prioritize, manage time effectively and multi-task Excellent communication skills Fluency in English (oral and written), French is an asset 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

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 As an intern at H55, you will play a strategic role that spans Business Development and Product Strategy . You will: Create business proposals and generate aircraft sales leads. Support the business development and marketing team in organizing and executing promotional missions (e.g., the Nordics). Help determine the future product roadmap of H55, including electric motors and batteries. Assist in segmenting customer applications and usage cases and perform technical and market analysis to evaluate trends and electrification needs. Support the definition of high-level technical specifications aligned with market requirements. Participate in competitor benchmarking and strategic positioning. Work with the innovation team to assess technical feasibility (short, mid, and long term). Assist in grant applications and RFP drafting. Support investor relations and strategic initiatives. Contribute to internal strategy meetings and cross-functional collaboration. Update different tools used for Business Development and Product Roadmap Definition Your Profile This role is ideal for someone with a genuine passion for aerospace, a proactive mindset, and the ability to contribute creative and practical solutions. We are seeking a confident, outgoing individual who takes initiative and thrives in dynamic environments. Your contributions will directly influence the commercialization and expansion of our business. We are looking for a motivated individual with a passion for innovation and aerospace, a hands-on approach, and the ability to think outside the box. Qualifications: This role is ideal for someone with a genuine passion for aerospace, sustainability, and innovation, who thrives in fast-paced environments and enjoys working on both technical and commercial fronts. Qualifications: Pursuing or holding a degree in engineering, business, technology management, entrepreneurship, or a related field. Athletic or high-performing mindset is appreciated for its perseverance and goal-orientation. Flexible, adaptable, and resilient under pressure. Strong interpersonal skills and comfort working across diverse teams. Experience in market analysis, communications Preferred Skills: Proactive and entrepreneurial mindset; ability to lead projects independently. Proficient in Microsoft Office Suite, particularly Excel and PowerPoint. Fluent in English; additional languages are a plus. Knowledge or experience in electric motors and battery technologies is a strong plus. Solid analytical and problem-solving skills. Strong interest in aviation and emerging electric mobility solutions. Additional Information Location: Sion, Switzerland Start Date: Summer 2025 Duration: 6 months

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.

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