Business Details
50+ Years
experience
Your Trusted Partner for Engineering Solutions
TD & H Engineering has been delivering engineering excellence since 1965, serving diverse clients from unincorporated communities to large corporations. Our expertise spans civil, structural, and environmental services, supporting clients through every project phase from concept to construction. We prioritize innovative solutions to complex technical challenges, assigning professionals who understand client needs and deliver results. Our commitment to service is reflected in our client-centric approach, measuring success through satisfaction and long-term partnerships. With offices across five states, we combine local knowledge with national expertise to address regional and national infrastructure demands.Our teams dedication to professional development and cutting-edge technology ensures high-quality, forward-thinking engineering solutions. Recognized for award-winning projects, we maintain a legacy of excellence while adapting to evolving industry standards. Our mission remains steadfast: to provide timely, cost-effective services that exceed client expectations. This philosophy drives our work in municipal engineering, transportation, environmental systems, and more. As an employee-owned firm, we foster a culture of accountability, collaboration, and continuous improvement.
Services
Municipal Engineering
Civil Engineering
Structural Engineering
Funding Procurement
Surveying
Geotechnical Engineering
Transportation Engineering
Environmental Engineering
Aviation
Construction Administration
Details
- Year established: 1965
Highlights and features
- We offer over 60 years of engineering excellence with a proven track record in complex projects.
- Our employee-owned structure ensures accountability and dedication to client success.
- We provide multidisciplinary services across five states, from municipal infrastructure to environmental engineering.
- Our team includes licensed professionals with expertise in specialized disciplines like precast concrete and seismic design.
- We combine cutting-edge technology with practical solutions for efficient, sustainable outcomes.
Services
Structural Engineering
Our structural engineers deliver safe, innovative designs for commercial, industrial, and public projects. Utilizing advanced software like Revit and Tekla, we specialize in new constructions, renovations, and seismic retrofits. With licensed professionals in multiple states, we ensure compliance with the latest building codes and standards.
Civil Engineering
We provide comprehensive civil engineering for land development, water systems, and transportation networks. Our expertise includes stormwater management, site design, and municipal permitting. We collaborate with clients to address regulatory compliance and aging infrastructure challenges across public and private sectors.
Funding Procurement
Our team secures competitive grants and loans for municipal projects through programs like CDBG, USDA Rural Development, and State Revolving Funds. We prepare preliminary engineering reports and public information campaigns to maximize funding opportunities and ensure project approval.
Surveying
We offer boundary, topographic, and construction surveys using GPS, drones, and 3D scanning technology. Our services support land development, infrastructure projects, and legal documentation, ensuring accuracy and compliance with state and federal standards.
Geotechnical Engineering
Our geotechnical services include subsurface investigations, foundation design, and slope stability analysis. We address challenging soil conditions like expansive or liquefiable soils, providing mitigation strategies for residential, commercial, and industrial developments.
People
Steven Marsh
CEO / President
With 28 years of experience, Steven leads TD&Hs strategic growth and oversees environmental and municipal permitting, land development, and client relations. He specializes in regulatory compliance and construction administration.
Paul Hopkins
Regional Manager
Paul, a licensed structural engineer in over 30 states, manages complex projects including healthcare facilities and industrial structures. He also teaches structural engineering at Widener University and contributes to industry standards.
Andrew Cooper
Structural Engineer
Andrew specializes in precast concrete design, with experience in parking garages, warehouses, and architectural cladding. He leads projects from concept to completion, ensuring precision in gravity and lateral load calculations.
Brady Lassila
Transportation Engineer
Brady designs bridges, roadways, and retaining walls, focusing on seismic and gravity load analysis. He applies AASHTO standards to public and private projects across the Pacific Northwest and Mountain regions.
Craig Nadeau
Geotechnical Engineer
Craig manages geotechnical evaluations and construction materials testing for large-scale industrial and municipal developments. His expertise includes mitigating risks from expansive soils and liquefaction hazards.
Questions
What engineering services does TD&H offer?
We provide civil, structural, environmental, geotechnical, transportation, and surveying services for public and private sector projects.
In which states does TD&H operate?
We serve Idaho, Montana, North Dakota, Pennsylvania, and Washington with regional offices in key locations.
How long has TD&H been in business?
We were founded in 1965 and have over 60 years of experience in engineering excellence.
Does TD&H handle municipal infrastructure projects?
Yes, we specialize in municipal engineering, including water systems, stormwater management, and roadway improvements.
Can TD&H assist with grant funding for infrastructure?
Yes, our team secures grants through federal and state programs like CDBG, USDA Rural Development, and State Revolving Funds.
