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Marvin Engineering (MEC) is the flagship company of the Marvin Group providing world class machining and defense products such as bomb racks, missile rail launchers, aircraft pylons and other associated equipment.

Marvin Land Systems (MLS) develops and manufactures variety of products for ground combat vehicles including Environmental Control Systems, Auxiliary Power Units, Generators and NBC systems. MLS also provides modification and overhaul kits for tanks and tracked vehicles.

With one of the largest machining facilities in the United States, Aerospace Dynamics International (ADI) is a world class manufacturing and production company specializing in high precision and large complex parts for the aerospace and defense industry.

Geotest - Marvin Test Systems (MTS) provides end to end test solutions to worldwide military, industrial and commercial customers operating in environments from the flight-line to the production floor and are recognized as high-performance and high-reliability testers.