Established in 1983, Tetrad Electronics, Inc. is a full-service contract manufacturer of electronic equipment and assemblies. Based in Willoughby, Ohio, the company offers a wide range of services, including complete purchasing, inventory services, printed circuit board design/manufacturing, through hole assembly, surface mount assemblies, wave soldering as well as complete wire harness. The firm operates from its electrostatic discharge (ESD) controlled facilities. Tetrad Electronics, Inc. is an ISO 9000:2000 certified company. The firm collaborates with its sister company, Focus Manufacturing, Inc., to satisfy a number of electronics, machining and metal fabrication needs.