I.C. Thomasson Associates, Inc., a Salas O'Brien Company Email Format

Design ServicesTennessee, United States201-500 Employees

I.C. Thomasson Associates, Inc. (ICT) is a design-focused consulting engineering firm founded in 1942 and headquartered in Nashville, Tennessee. It provides in-house design across mechanical, electrical, plumbing, fire protection, instrumentation and controls, and IT/Telecom systems for facilities in industrial, manufacturing, institutional, healthcare, commercial, aviation, and education sectors. ICT supports more than 1,200 projects annually, with construction costs for individual projects exceeding one billion dollars; it is licensed to deliver professional engineering services in all 50 states and has completed work across the United States and abroad. 

In 2024, ICT was acquired by Salas O’Brien, a West Coast-based firm, linking ICT to a broader national practice. The combined organization offers access to a large pool of licensed professionals and maintains multiple offices, including the Nashville headquarters and locations in Knoxville, Tampa, and Brookhaven, to support local and regional project delivery.

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