“Firms don’t design projects; people do.” Established in 1956 by William A. Thompson, Jr. and John W. Litton, this belief was ... instilled nearly 65 years ago and is still apparent by the professionalism you will find with each Thompson & Litton employee. T&L provides comprehensive civil, structural, mechanical, electrical, and plumbing engineering; surveying; architectural and Design-Build services through offices located in Wise, Radford, Tazewell, and Chilhowie, Virginia; and in Bristol, Johnson City, and Mosheim, Tennessee. read more