STV Group (United States)

STV Group, Inc., is a private, employee-owned corporation specializing in engineering, architecture, planning and construction management services, serving the building and facilities, transportation, energy, and infrastructure market sectors. Employing more than 1,700 professionals, STV has national and international offices.

STV marked its 100th anniversary in 2012. STV's oldest predecessor firm, Seelye Stevenson Value & Knecht, was founded in New York City in 1912 as Elwyn E. Seelye & Co. as a structural engineering firm. Over the years, the firm's disciplines grew to include mechanical, electrical and civil engineering. The firm performed multi-discipline engineering services throughout the country, working on projects such as the Thomas Jefferson Memorial in Washington, D.C., the parachute jump at the 1939 World's Fair, NASA's Vehicle Assembly Building at the Kennedy Space Center in Florida, and the Enrico Fermi National Accelerator Laboratory in Batavia, Illinois.

Sanders & Thomas is another predecessor firm of STV's and was founded in Pennsylvania in 1945. Sanders & Thomas performed process and industrial engineering and was best known for its development of numerous new machines. Sanders & Thomas merged in 1968 with Voss Engineering Company, a manufacturer, to form STV, Inc., a management holding company established to acquire other firms that would later evolve into the present-day STV Group.