STC, Inc. provides engineering and manufacturing services for three primary markets: ELECTRONIC MANUFACTURING SERVICES (EMS) Advanced-turnkey engineering and manufacturing services for a wide range of electronics applications, including aerospace, defense, and high-realiability commercial and industrial. Our focus is on low to medium-volume assemblies with a high degree of complexity. TRANSFORMER MANUFACTURING Custom transformers, inductors, and coils for electronics applications. We are capable of producing transformers up to 10 KVA, with designs that cover a broad range of transformer types and applications, which include aerospace, defense, medical, broadcasting, marine, and more. EMTRAC PRIORITY MANAGEMENT & SAFETY STC handles the full development and manufacturing of the EMTRAC System, which is the technological leader in traffic-signal priority management and transportation safety. The EMTRAC System is used throughout North America by industry-leading first-response, transit, and traffic agencies.
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The STC Inc. annual revenue was $7 million in 2026.
Brad Cross is the President of STC Inc..
8 people are employed at STC Inc..
STC Inc. is based in McLeansboro, Illinois.
The NAICS codes for STC Inc. are [335311, 33531, 3353, 33, 335].
The SIC codes for STC Inc. are [36, 361].