Parsons Corporation (Parsons) is an engineering, construction, technical, and management services firm headquartered in Pasadena, California. Founded in 1944 by engineer Ralph M. Parsons, Parsons Corporation is currently one of the largest such companies in the United States with more than 15,000 employees and revenues of $3.1 billion in 2014. It is 100% owned by its Employee Stock Ownership Trust.