About Exotrail 🚀

Born from a strong ambition to reach for the stars, Exotrail is a fast-growing scale-up founded in 2017. Its mission: to develop and commercialize propulsion systems for small satellites on a global scale.

We design products focused on impact, fast delivery, and continuous improvement. Inspired by the digital world, we are firmly customer-oriented and driven by an entrepreneurial spirit.

We manage risks to push boundaries and achieve results that would not be possible within a traditional space model.

We deploy every necessary resource to support the development of our products, whether in propulsion or in-orbit services. Strengthened by an innovative mindset inherited from our early days, we are preparing to grow into an ambitious industrial company.

Job Description 👨‍💻

The Propulsion Test Engineer intern will support the qualification and validation of propulsion products by participating in lifetime testing activities, technical documentation and report writing. This role offers hands-on exposure to propulsion systems testing and product qualification processes in an engineering environment.

The intern will work under the supervision of a Test Engineer within the Technology team, in the Propulsion branch of Exotrail.

Key Responsibilities

📌 Support the execution of lifetime and endurance tests on propulsion components or systems.

📌Assist in test setup, verification, including preparation of test benches and instrumentation under supervision.

📌Monitor tests, collect data and ensure proper recording of results.

📌Perform document gathering and organisation, including test procedures, requirements, specifications and test data.

📌Contribute to the analysis of test results in collaboration with the Test Engineer.

📌Write and update test reports, qualification reports and associated technical documentation.

📌Support the product qualification process, ensuring traceability between requirements, tests, and results.

📌Follow laboratory safety rules, test protocols and quality procedures.

📌Participate in technical meetings and reviews with the propulsion and test teams.

Learning Objectives 🎯

During the internship, the intern will gain experience in:

• Propulsion system testing and qualification methodologies

• Lifetime testing and reliability validation

• Engineering documentation and reporting standards

• Working within a structured test and quality framework

• Collaboration with experienced Test Engineers and multidisciplinary teams
  

Required skills 💁‍♀️

• Currently pursuing a degree in Aerospace Engineering, Mechanical Engineering, Electrical Engineering, or a related field.

• Basic understanding of engineering testing principles.

• Ability to write clear, structured technical reports.

• Strong attention to detail and organizational skills.

• Proficiency with Excel and Word.

• Proficiency in Python is a plus.

Soft Skills

• Analytical and methodical mindset.

• Good communication skills, both written and verbal.

• English level B2 is required, both in technical writing and spoken.

• Ability to work effectively in a team and follow technical guidance.

• Proactive attitude and willingness to learn.
  

Start date 🗓️

February - March 2026

6 month Internship

Site: Massy