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Business Details
50+ Years
experience
Your Trusted Engineering Partner in Montana and Beyond
TD & H Engineering has been delivering high-quality engineering solutions since its incorporation in 1965. Our firm provides civil, structural, and environmental engineering services to a diverse clientele, including municipalities, corporations, and individuals across Idaho, Montana, North Dakota, Pennsylvania, and Washington. With a team of licensed professionals, we specialize in project phases spanning concept development, design, and construction administration, prioritizing innovation and client satisfaction.

Our work has earned industry recognition, including awards for architectural precast design and transportation projects. Employee-owned and community-focused, we invest in steady growth, professional development, and cutting-edge technologies to address complex technical challenges. Over six decades, our commitment to excellence has solidified our reputation as a trusted partner in engineering excellence.
Services
Civil Engineering Structural Engineering Environmental Engineering Transportation Engineering Geotechnical Engineering Surveying Construction Administration Municipal Engineering Funding Procurement Materials Testing
Details
  • Year established: 1965
Highlights and features
  • We have over 60 years of experience in civil and structural engineering.
  • Our team of licensed professionals is employee-owned and deeply committed to client satisfaction.
  • We serve clients across Idaho, Montana, North Dakota, Pennsylvania, and Washington with tailored solutions.
  • Our engineering excellence has been recognized with industry awards such as the PCI Design Award.
  • We handle projects from concept development through construction, ensuring seamless execution.
Services
Civil Engineering
Our civil engineering services focus on municipal and industrial projects, including land development, water and wastewater systems, and transportation design. We provide comprehensive solutions from initial planning to construction, prioritizing sustainability and regulatory compliance. Our expertise ensures efficient infrastructure that meets community and client needs.
Structural Engineering
We offer structural engineering for commercial, healthcare, and educational facilities, using materials like steel, concrete, and wood. Our team designs safe, durable structures while addressing seismic, wind, and snow loads. Projects include hospitals, universities, and award-winning architectural designs.
Environmental Engineering
Our environmental services address water treatment, stormwater management, and remediation projects. We specialize in compliance with regulatory standards and sustainable practices. Recent projects include fish passage improvements and water resource engineering for municipal systems.
Transportation Engineering
We design transportation systems, including roads, bridges, and traffic studies. Our work ensures safe, efficient mobility solutions for urban and rural areas. Projects involve roadway upgrades, sidewalk improvements, and traffic flow analysis aligned with regional needs.
Geotechnical Engineering
Our geotechnical services include soil testing, foundation design, and slope stability assessments. We address complex subsurface conditions like expansive soils and liquefaction risks, providing mitigation strategies for residential, commercial, and industrial developments.
People
Steven Marsh
CEO / President
Steven Marsh has 28 years of experience in environmental permitting, land development, and infrastructure design. He leads TD&H's strategic growth and client relations from the Spokane office.
Rodney Blake
Vice President / Regional Manager
Rodney Blake specializes in structural engineering for bridges, buildings, and industrial structures. Licensed in five U.S. states and Canadian provinces, he manages structural projects and teams nationwide.
Paul Hopkins
Regional Manager
Paul Hopkins, a licensed structural engineer with over 30 state licenses, directs TD&H's Media, PA office. His expertise includes precast concrete and seismic-resistant designs for healthcare and educational facilities.
Kyle Scarr
Regional Manager
Kyle Scarr focuses on geotechnical and civil engineering for land developments and infrastructure projects. He holds a master's degree in civil engineering and oversees Bozeman office operations.
Bucky Kempa
Engineer - Electrical
Bucky Kempa designs electrical systems for medical, industrial, and data center projects. A LEED AP, he ensures energy-efficient and code-compliant solutions for complex facilities.
Questions
What services does TD&H Engineering offer?
TD&H provides civil, structural, environmental, transportation, and geotechnical engineering services, along with surveying, materials testing, and construction administration.
How long has TD&H Engineering been in business?
TD&H Engineering has delivered engineering solutions since 1965, with over 60 years of industry experience.
Which areas does TD&H Engineering serve?
We operate in Idaho, Montana, North Dakota, Pennsylvania, and Washington, with regional offices in key cities.
Is TD&H Engineering employee-owned?
Yes, TD&H is an employee-owned firm, fostering commitment to client satisfaction and professional growth.
What industries does TD&H Engineering work with?
We serve municipal governments, healthcare, education, industrial, and commercial sectors with tailored engineering solutions.
Has TD&H Engineering received industry awards?
Yes, our projects have earned accolades such as the PCI Design Award and APA Excellence in Design and Manufacturing.