Senior Mechanical Engineer, Brussels

Sphere Defense is a fully funded technology startup with the mission of providing allied countries with sovereign, effective and seamless autonomous countermeasures to neutralize todays’ and tomorrow’s aerial threats. Sphere Defense was founded by industry veterans with previous successful exits, and is headquartered in Brussels, Belgium, in the heart of Europe.Who we look for and what you’ll do

You are an experienced and highly-motivated Mechanical Design Engineer that has worked with high-speed, small-scale flying vehicles (ideally VTOL drones). You are familiar with electro-mechanical systems, composite materials, aerodynamics, flight control surfaces and mid-volume production. You will own the mechanical design of our countermeasure, define the manufacturing technologies and ensure a smooth transition from internal R&D to external production partners. Be one of the first members of a high-performing team, designing and developing autonomous countermeasures to protect allied countries from aerial threats Design, develop, prototype and test flying vehicles for flight performance, vibration resistance, reliabilityCalculate tolerances, stress and buffers to ensure the correct balance between cost, durability and performance Identify the right materials and production techniques for different parts of the vehicles Identify and interface with external prototype and production partners Work closely with the electrical engineering team for E/M co-designIdentify and work closely with simulation partners for FEA/CFD Ensure the designs adhere to the industrial quality standards by drafting test plans and working with test houses for validation and certification Draft production-level documentation, including GD&T, during the entire product lifecycle Be a team player and a mentor, being available to support and grow the team Requirements

Bachelor’s or Master’s degree in Mechanical Engineering or equivalent Demonstrated experience in the role, bringing products from conception to production with mid-volume production Proficiency with SolidWorks or other established CAD packages Experience with composite materials and at least two among: plastic injection, thermoforming, metal stampingExperience with medium-scale, integrated electro-mechanical systems (actuators, sensors, flex circuits mechanical outlines, wiring harnesses, electrical connections, etc.) Experience in creating and maintaining production-ready documentation (technical drawings, assembly diagrams, etc.) Hands‑on, with demonstrated ability in quickly prototyping mechanical systemsAbility to execute incoming inspection and dimensional accuracy checks on golden samples Preferred Qualifications

First‑hand expertise with CFD and/or FEA Experience with CAM programs for manufacturing with CNC and lathe machines Experience with electro‑optical systems Experience setting up in-house prototyping labs Experience tutoring operators for incoming quality inspection Benefits

Sphere Defense offers attractive compensation, stock options (depending on geography and position) and a unique opportunity to change the global defense landscape. This role is only open to candidates with right to work in Belgium. We cannot provide visa sponsorship at this time.

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