Great Falls, MT

TD&H’s corporate headquarters in Great Falls, Montana supports a local staff of 45, offering a truly comprehensive menu of engineering and related services to local and regional clients.  With this variety of technical and administrative assistance available, our customers include a unique blend of individuals, international corporations, rural utility districts; large municipalities, County, State and Federal agencies, including the Montana Air National Guard and Malmstrom Air Force Base.  Established in 1965 and engineering local improvements ever since, you would be hard pressed to travel a city block in Great Falls without crossing a facility we have not touched.