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

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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

  • Administrative Assistant

    The Lewiston regional offices of TD&H Engineering and Northwest Media has an immediate job opening for an Administrative Assistant/Receptionist with at least three years experience.
    Job responsibilities include superior customer service, meeting with clients, answering phones, document preparation, mailings, invoicing, scanning and copying, and other non-specified tasks needed to keep the business running day-to-day.
    Although not required, graduation from a two- or four-year higher education program is desirable. Preferred skills include attention to detail, excellent written and oral communication, thorough understanding of Microsoft office products, including Word and Excel, and familiarity with Adobe products such as InDesign, Illustrator and Photoshop.
    TD&H has a total of more than 100 employees that serve municipal, More >

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  • Mike Johnson – Farewell to a Dear Friend & Co-Worker

    It’s with very heavy hearts and much sadness that we say farewell to a dear friend and co-worker. Mike Johnson, our Corporate CADD Manager, passed away Saturday, May 20, 2017.
    He will be missed by all of us at TD&H and the entire community of Great Falls. The impact he had on many lives has left a lasting impression.
    Mike’s obituary can be read here. Condolences to the family may be posted online at www.SchniderFuneralHome.com
      More >

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  • Entry-Level Civil Engineer (Structural)

    TD&H Engineering has an immediate opening in the Spokane, WA office for an entry-level civil engineer with an emphasis on structural and a strong knowledge of CADD.
    Applicants must possess either a Bachelor of Science degree or higher from an accredited university. Certification as an Engineering Intern (E.I.) is desirable. The ideal candidate would be capable in design and drafting using AutoCAD.  Exceptional communication skills, along with a strong team attitude and a positive client focus are essential.  Work will include an emphasis in structural engineering design and drafting for a wide variety of projects.
    TD&H offers a competitive compensation and benefits package, More >

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