REI specializes in the design and manufacture of electronic test equipment for security applications. The company was founded in 1983 in Cookeville, Tennessee, U.S.A. by Bruce Barsumian, who later partnered with Tom Jones (GM) in 1995. In June 2019 REI became an Electronic Technologies subsidiary of HEICO Corporation (Hollywood, FL, USA). REI customers include government agencies, law enforcement organizations, corporate security personnel, and TSCM professionals worldwide that have a need and responsibility to protect sensitive information.