Vertex Modernization and Sustainment is a subsidiary of defense giant V2X that specializes in engineering solutions, equipment modernization, advanced military platforms, and system integration for the U.S. Armed Forces. The company manufactures the Tempest short-range air defense system—built on a Can-Am Maverick X3 buggy armed with Hellfire missiles—which is actively procured by the U.S. Marine Corps and deployed by Ukrainian air defense forces to intercept strike drones.