- Aeronautical Research and Test Institute/Výzkumný a zkušební letecký ústav, a.s.
 - Conducting research, development, and testing related to aircraft in both the national and commercial sectors. Also in Czech. - Aircraft Development and Systems Engineering BV
- General Kinetics
- Provides research and development of hydrogen peroxide gas generators, rocket engines, and catalysts for propulsion and power systems.
- Genesis Engineering Company, LLC
- Technology development, engineering services, and manufacturing of aerospace hardware for space applications, and Ground Support Equipment (GSE) to support flight hardware development.
- Klune Industries, Inc
- Engineering, design, and fabrication company specialising in sheet metal and related materials.
- LABEN
- A Finmeccanica company. Offers a range of products for aerospace applications in ground, bus, and payload areas, as well as spin-off derivatives of aerospace technology for civil or industrial use.
- M-DOT Aerospace
- Develops gas turbine design, titanium forming, aircraft tailpipes and exhaust systems, stretch forming, heavy fuel engines, shaft dynamics, and thermodynamics.
- Midé Technology Corporation
- Product design and consulting company specialising in smart material and aerospace systems.
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