Thomas Dean & Hoskins, Inc.

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.


Monday - Friday, 8:00am - 5:00pm

(406) 761-3010


Project Spotlight: I-90 Quartz Flats Rest Area CE&I

Location: Near Superior, MT Client: Montana Department of Transportation TD&H provided construction engineering and inspection (CE&I) services as well as contract administration for the Quartz Flats rest area. Using consultant services with a design/build project is new to MDT, requiring flexibility and adaptability from our team. TD&H provided a construction inspector and various supplemental staff…



Ground Breaking Ceremony for Great Falls Aquatics & Recreation Center

September 28, 2021

TD&H was proud to attend the Ground Breaking Ceremony for the City of Great Falls Aquatics & Recreation Center on…


Welcome Sean Eisenhauer!

September 22, 2021

Join us in welcoming Sean to the Great Falls Office. Sean is a Media, PA employee but calls the Great…


TD&H Engineering is the Great Falls Area Chamber of Commerce Member of the Month!

September 21, 2021

TD&H was chosen for their efforts in helping to develop the Safe Use River Map for the Missouri River, which…


Featured Projects

Missouri River Forcemain Crossing Feasibility Study Building

Missouri River Forcemain Crossing Feasibility Study

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Great Falls Water Main Crossings

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Great Falls High School & Memorial Stadium

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Sun River Connector Trail

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