Johnson, Mirmiran & Thompson, Inc. (JMT) is an engineering and architecture firm that provides a range of services, including transportation planning and design, environmental engineering, construction management, and surveying. The company serves clients in the transportation, environmental, and construction industries, as well as government agencies and municipalities. JMT is headquartered in Sparks, Maryland, and has offices throughout the United States. The company was founded in 1971 and has grown to become one of the largest engineering firms in the country. JMT is committed to sustainability and has implemented a number of initiatives to reduce its environmental impact, including the use of renewable energy sources and the implementation of green building practices.