STV Incorporated is a US-based professional services firm providing engineering, architecture, planning, program and construction management, and advisory services for transportation systems, buildings, water and other infrastructure. Founded in New York City in 1912 as Elwyn E. Seelye & Co., it operates 60+ offices across North America with roughly 4,000 employees and is headquartered in the Empire State Building in Manhattan. STV is a privately held portfolio company of The Pritzker Organization; its work includes the World Trade Center Transportation Hub, Grand Central Madison and LA Metro's zero-emission bus program.