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

Water & Wastewater
Funding Procurement
Landscape Architecture

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

  • April is Landscape Architecture Month

    The Governors of Idaho and Montana have proclaimed April as Landscape Architecture Month.   This month, people are encouraged to plant and care for trees and to acknowledge the quality of life that trees and green spaces contribute to our lives.
    April is World Landscape Architecture Month (WLAM) 2017, an international celebration of landscape architecture.  WLAM introduces the profession to the public by showcasing landscape architect designed spaces around the world.
    Working with landscape architects, communities can promote health and well-being by encouraging the development of environments that offer rich social, economic, and environmental benefits. Healthy, livable communities improve the welfare and well-being of people by expanding the range of affordable transportation, More >

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  • Structural Design Engineer

    TD&H Engineering has an immediate opening in the Lewiston, Idaho office for a highly-motivated structural design engineer who has the desire to communicate with clientele and manage projects.
    Applicants must possess either a Bachelor of Science degree from an accredited university with at least 4 years of relevant work experience, or a Master of Science degree with at least 2 years of relevant work experience. Professional licensure is desirable; non-licensed applicants must be able to sit for the PE exam within one year. Experience with steel, concrete, masonry and/or timber design is a must. Ideally, an applicant would have demonstrated experience in the design of 2-3 of the common construction materials. More >

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  • Employee Spotlight – Mary Barfield

    Have you met Mary Barfield? She’s quite the traveler! She responded to a job listing on Craigslist when the Great Falls office was searching for a new structural engineer to round out their team. She has had the opportunity to work remotely for a brief period and is now in the Media, Pennsylvania office. She came back this fall from an Eastern Mediterranean cruise with her family and when asked about it she told us “It was AWESOME!”
    Her previous work history has been anything but dull. Before her time at TD&H, Mary was deployed to Afghanistan as an Air Force civil engineer in 2006. More >

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