Mechanical Engineer / Mechanical Engineeress

H55 SA - March 31, 2026

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. The company excels in developing propulsion and energy storage solutions that are modular, lightweight, and certifiable. H55 is solidifying its position as a major enabler in the electric aviation market by integrating and flying four electric airplanes.

About the Role

In the framework of its product development (Electric Propulsion System and Modular Battery Pack), H55 is seeking a Mechanical Design Engineer to work on various components of the system, with a particular focus on the Battery Module.

Your Responsibilities

As a Mechanical Design Engineer at H55, your primary mission is to craft cutting-edge products that are integral to our electric propulsion system. Your responsibilities will include:

  • Designing lightweight, manufacturing-optimized, and cost-efficient products, specifically focusing on the Battery Module.
  • Ensuring designs adhere to regulatory aerospace agency rules, with a strong emphasis on industry safety and performance standards.
  • Substantiating your designs with robust engineering practices and calculations.
  • Reviewing drawings, schematics, bills of material, and other documentation necessary for the manufacture, testing, installation, and commissioning of products.
  • Defining tests to guarantee the correlation and advancement of simulation models, as well as technology de-risking and validation.
  • Monitoring and managing problem reports and change requests.
  • Providing essential support to product production by analyzing deviation requests, among other tasks.
  • Supporting suppliers by addressing technical questions under general design guidelines.

Your Profile

  • A university degree with 4-7 years of experience in designing and validating mechanical components and assemblies, particularly with plastics and/or composite materials.
  • Experience in the mechanical design of battery modules is a significant advantage.
  • Familiarity with Airworthiness Certification Specifications (e.g., EASA CS-23 or FAA Part 23) and industry standards is advantageous; experience in another highly regulated domain is acceptable.
  • Proficiency in CAD programs like Autodesk Inventor.
  • Proven experience in Finite Element Analysis (FEA) is appreciated, with mastery of the Ansys bundle as an asset.
  • Knowledge of manufacturing processes with a focus on machining and plastic molding.
  • Hands-on experience in prototyping, testing, and manufacturing.
  • A motivated self-starter with a keen eye for organization and precision.
  • A strong commitment to quality.
  • Ability to work both independently and collaboratively in multidisciplinary teams.
  • Fluent in both written and spoken English and French.
  • Please note this role may require occasional travel to our headquarters in Switzerland.

Join Us

We offer a highly dynamic and multicultural environment where you can grow and learn by tackling ambitious challenges to shape the future of Electric Aviation. If this role excites you and aligns with your career goals, apply online using the form below. Please note that only applications matching the job profile will be considered. We look forward to receiving your application!

Location : Sion
Country : Switzerland

Application Form

Please enter your information in the following form and attach your resume (CV)

Only pdf, Word, or OpenOffice file. Maximum file size: 3 MB.