We're a consulting engineering firm offering a full range of services throughout Montana, Washington, Idaho, North Dakota, Pennsylvania & Utah.

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Services Designed with You in Mind

  • TD&H Engineering Survey Services


    Licensed surveyors using the latest technology for commercial and residential survey projects

    Learn More about Surveying Services
  • TD&H Engineering Civil Engineering Services

    Civil Engineering

    Creative solutions for structural, transportation, geotechnical & construction management

  • TD&H Engineering Land Development Services

    Land Development

    Site development planning requires an interdisciplinary team approach. We can help!

  • TD&H Engineering Water System Services

    Water Systems

    We design water distribution, storage and treatment solutions for communities and individuals

  • TD&H Engineering Wastewater Services


    Wastewater collection and treatment solutions that are human & environment-friendly

  • TD&H Engineering Structural Development Engineering Services


    Fast, accurate, cost-effective solutions for everything from bridges to buildings

  • TD&H Engineering Geotechnical Services


    You’ll find the leading experts in the geotechnical engineering field right here

  • TD&H Engineering Transportation Services


    Creating safe and efficient transportation designs for roads and bridges since 1965

  • TD&H Engineering Survey Services


    From meandering bike & pedestrian paths to skate parks & wave riders, talk to our experts

  • TD&H Engineering Industrial Engineering Services


    We have been providing quality services to industrial clients since 1965

  • TD&H Engineering Survey Services

    Construction Management

    We ensure a smooth process from pre-bid conferences to inspection and quality control

TD&H Engineering Recent Blog Posts

  • Employee Spotlight – Laurie Happ, Kalispell

    Chances are, if you have called TD&H office in Kalispell, MT, you have had the pleasure of speaking with Laurie Happ. She moved back “home” to Kalispell after living in Phoenix for 26 years and working for a large, nationwide …

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  • Civil Engineer

    The Spokane, Washington regional office of TD&H Engineering has an immediate opportunity for a civil engineer.  Responsibilities will include project management, surveying, design work, and permitting activities related to general civil engineering, site grading, and public water and sewer utilities.  A minimum of …

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  • Construction Representative

    The Spokane, Washington regional office of TD&H Engineering has an opportunity for a Construction Representative.  You would be expected to provide overall administrative and technical direction for projects.  Oversees total construction effort to ensure project is constructed in accordance with design, …

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