Private company

International Signal and Control

American defense contractor

International Signal and Control (ISC) was a U.S. defense contractor based in Lancaster, Pennsylvania, that was involved in the manufacture of electronic missile subassemblies, navigation components, fuses, power supplies for proximity fuzes, and grenade technology. By the 1980s, ISC's business primarily consisted of illegal arms sales started at the behest of various US clandestine organizations. On paper the company looked to be extremely profitable on sales of high-priced legitimate items, but in fact these profits were essentially non-existent.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

  • HeadquartersPhiladelphia1

International Signal and Control (ISC) was a U.S. defense contractor based in Lancaster, Pennsylvania, that was involved in the manufacture of electronic missile subassemblies, navigation components, fuses, power supplies for proximity fuzes, and grenade technology.2

Sources

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