Who we are
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.
About you
You are an experienced and highly-motivated Lead Aeronautical Engineer, UAS who has worked with small scale aircraft designs like unmanned VTOL fixed-wings (UAS).
What you’ll do
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 and test unmanned aircrafts (including airframes, actuators) powered by jet and electrical propulsion
Work with the Flight Control team to optimize the performance of the vehicles
Coordinate testing and validation internally and externally (e.g. wind tunnels, icing, etc.)
Be hands-on, developing and testing prototypes with the team in the field
Draft and review documentation and design documents
Be a team player and a mentor, being available to support and grow the team when needed
Location: Onsite in Brussels, Belgium. Our office is close to Gare Centrale.
Requirements
Bachelor's or Master’s degree in Aerospace engineering, Aeronautical Engineering, Mechanical Engineering or equivalent
At least 4 years of demonstrated experience with the design of fixed-wing light unmanned aircrafts (UAS) with vertical takeoff and landing (VTOL)
0 -> 1 experience in taking a design from concept to test flights
Proficient with Matlab/Simulink
Experience with jet and electrical propulsion and its integration into light aircrafts
Intimate understanding of aircraft static and dynamic stability analysis and simulation
Proficiency with CAD packages such as SolidWorks
Experience with aerospace-grade materials and manufacturing techniques
Knowledge of aerodynamics and fluid mechanics principles
Experience with coordination of external suppliers and partners (e.g. CFD, wind tunnel testing, etc.)
Preferred Qualifications
Knowledge of C++/Python and ROS2
Avionics and wiring harnesses design experience
Knowledge of EASA regulations in terms of flight testing
Experience with Thrust Vectoring Control
Experience with rocket propulsion integration
What we offer
Attractive compensation
Year-end bonus eligibility
Stock Options Plan eligibility
Mobility Budget
32 days of holidays
Meal vouchers
Private Health insurance
We are building a core team of hard-working people. If you want to join a company with tremendous impact and you are autonomous, creative and driven, we want to hear from you!
Sphere Defense offers 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.
Skills Required
- Bachelor's or Master's degree in Aerospace, Aeronautical, Mechanical Engineering or equivalent
- At least 4 years experience designing fixed-wing light unmanned aircraft (VTOL)
- Experience taking a design from concept to test flights (0->1)
- Proficient with Matlab/Simulink
- Experience with jet and electrical propulsion and integration into light aircraft
- Intimate understanding of aircraft static and dynamic stability analysis and simulation
- Proficiency with CAD packages such as SolidWorks
- Experience with aerospace-grade materials and manufacturing techniques
- Knowledge of aerodynamics and fluid mechanics principles
- Experience coordinating external suppliers and partners (e.g., CFD, wind tunnel testing)
- Right to work in Belgium (no visa sponsorship provided)
- Knowledge of C++ and/or Python and ROS2
- Avionics and wiring harnesses design experience
- Knowledge of EASA regulations for flight testing
- Experience with Thrust Vectoring Control
- Experience with rocket propulsion integration
What We Do
Sphere Defense is a Brussels-based defence-tech company specializing in the development of sovereign European countermeasures. They are building a jet-powered, AI-guided counter-UAS (Unmanned Aircraft System) interceptor designed to protect allied nations with effective and seamless technology. Founded by experienced drone industry experts, the company focuses on ensuring security through advanced interceptor systems to combat the evolving threat of unmanned aircraft systems.









