Incorporated in 1965, Thomas Dean & Hoskins, also known as TD&H, is a consulting engineering firm. The company has operations throughout Montana, Washington and Idaho. It serves various individuals, rural water districts and large corporations. The company assists clients with a variety of concept development services. Thomas Dean & Hoskins specializes in transportation planning, street integration, drainage control and land development services. It also provides a range of geotechnical investigation, stormwater permitting and construction management solutions. The company offers services to various clients in the commercial, industrial, retail and residential sectors. Thomas Dean & Hoskins has worked on several projects, including Northview Estates in Washington and Gallatin Peaks Town and Harbor Village in Montana.