What TD&H Engineering does

TD&H Engineering (legal name Thomas Dean & Hoskins, Inc.) is an employee-owned, full-service consulting engineering firm headquartered in Great Falls, Montana, founded in 1965. It operates nine offices across five states — Idaho, Montana, North Dakota, Pennsylvania, and Washington — and serves government, municipal, healthcare, education, defense, and commercial/industrial clients with a multidisciplinary engineering portfolio spanning civil, structural, geotechnical, environmental, water/wastewater/stormwater, transportation, bridge, surveying, materials testing, industrial hygiene, landscape architecture, aviation, and now MEP engineering (added via the acquisition of GPD Consulting Engineers). The firm emphasizes local presence alongside regional reach, with offices staffed by licensed Professional Engineers, surveyors, inspectors, technicians, and CAD operators.

Underlying technical capability is centered on established engineering software and methodologies rather than proprietary platforms. The firm's differentiator is specialty precast concrete engineering executed via Tekla Structures and Revit for building information modeling (BIM), 3D visualization, shop drawings, fabrication tickets, and erection/lifting documentation — supported by named award-winning projects (Princeton's Institute for Advanced Study, Medstar Georgetown University Hospital, Institute for Defense Analysis). The Great Falls materials testing laboratory is accredited by AASHTO and validated by the US Army Corps of Engineers, qualifying the firm for federally validated construction materials testing and construction administration engagements.

Revenue is generated through project-based professional services fees billed to government, municipal, and private clients. Go-to-market is sales-led, with direct delivery via the nine regional offices, supported by an active website/portfolio, industry-event presence (e.g., IACC conference), and on-call municipal engineer relationships. The firm is 100% employee-owned via an ESOP, which is positioned internally as aligning employee incentives with client outcomes. Pricing is not publicly disclosed and contracts are structured per project based on scope and complexity, including fixed-fee municipal work and discretionary on-call arrangements with recurring town clients.

Name

TD&H Engineering

Legal name

Thomas Dean & Hoskins, Inc.

Website

https://tdhengineering.com

Company type

Private

Founded year

1965

Operating status

Operating

Headcount range

51–100 employees

Short description

TD&H Engineering is an employee-owned, full-service consulting engineering firm founded in 1965, serving government, municipal, healthcare, education, defense, and commercial clients across Idaho, Montana, North Dakota, Pennsylvania, and Washington with civil, structural, geotechnical, environmental, surveying, materials testing, and MEP engineering services.

Ownership category

akta.pro rank

Headquarters

HQ city

Great Falls

HQ country

United States

HQ region

North America

Offices9 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Engineering Consulting Services: Professional consulting engineering services billed on a project basis. Services include civil engineering, structural engineering, geotechnical engineering, environmental engineering, surveying, construction administration, materials testing, and other engineering disciplines. Revenue is generated through project fees, consulting contracts with government and private clients.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

TD&H Engineering is a full-service consulting engineering firm providing civil, structural, geotechnical, environmental, transportation, water/wastewater, and surveying engineering services to government, municipal, and private commercial clients. The firm also offers specialty precast concrete design using BIM (Tekla Structures and Revit), construction administration, materials testing, landscape architecture, and, through its GPD Consulting Engineers subsidiary, mechanical, electrical, and plumbing (MEP) engineering services.

Product overview

TD&H Engineering is a full-service consulting engineering firm established in 1965, offering a comprehensive portfolio of engineering disciplines including Bridge Engineering, Municipal Services, Civil Engineering, Structural Engineering, Precast Concrete Design, Geotechnical Engineering, Environmental Engineering, Water/Wastewater/Stormwater Systems, Transportation Engineering, Surveying, Construction Administration, Materials Testing, Industrial Hygiene, Land & Site Development, Landscape Architecture, Aviation, and MEP Services. The company operates 9 offices across Idaho, Montana, North Dakota, Pennsylvania, and Washington. TD&H recently expanded its capabilities through the acquisition of GPD Consulting Engineers, adding Mechanical, Electrical, and Plumbing (MEP) engineering services to its portfolio. The firm specializes in providing integrated multidisciplinary engineering solutions for public and private sector clients.

Differentiator

Problem solved

Functional benefit

Products and services

• Bridge Engineering Engineering services for bridge design, evaluation, and construction administration including fish passage structures and timber bridges, delivered to public and private clients.
• Municipal Engineering Services Engineering services for municipal infrastructure including water systems, wastewater treatment, stormwater management, and public facilities for city, county, state, and federal clients.
• Civil Engineering Civil engineering design services including site development, grading, utilities, and infrastructure planning for commercial, residential, and public projects.
• Structural Engineering Structural design services for buildings, bridges, and industrial facilities including steel, concrete, wood, and masonry construction.
• Precast Concrete Design Specialized precast concrete engineering using Tekla Structures and Revit for BIM modeling, shop drawings, fabrication tickets, and erection support for building and garage structures.
• Geotechnical Engineering Geotechnical investigation and engineering services for foundation design and site characterization.
• Water, Wastewater, & Stormwater Systems Design and engineering for water distribution, wastewater collection, treatment systems, and stormwater management for municipal and private clients.
• Transportation Engineering Roadway design, traffic studies, and transportation infrastructure engineering services for municipalities and state departments of transportation.
• Environmental Engineering Environmental assessments, remediation design, and compliance services for contaminated sites.
• Surveying Land surveying services including topographic, boundary, construction staking, and ALTA surveys.
• Materials Testing Field and laboratory testing services for construction materials including concrete, soil, and asphalt, conducted in an AASHTO-accredited and US Army Corps of Engineers-validated laboratory.
• Construction Administration Construction observation, inspection, contract administration, and project management services for built-environment projects.
• MEP Services (Mechanical, Electrical, Plumbing) Mechanical, electrical, and plumbing engineering design services for buildings including HVAC, electrical distribution, plumbing systems, and fire alarm systems, delivered through the GPD Consulting Engineers subsidiary.
• Land & Site Development Site planning, civil design, and engineering for commercial and residential land development projects.
• Landscape Architecture & Planning Landscape design, irrigation planning, and site aesthetic improvements for various project types.
• Industrial Hygiene Testing and inspection services for mold, asbestos, lead paint, and indoor air quality.
• Aviation Engineering Engineering services for aviation facilities and infrastructure.
• Funding Procurement Assistance with obtaining grants, bonding, and other funding sources for infrastructure projects, primarily for public-sector clients.

Quantifiable outcome

• Great Falls Water Treatment Plant won American Council of Engineering Companies of Montana Grand Project Award Winner (2019)
• +3 more outcomes

Named customers20 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• GPD Consulting EngineersmajorStrategic or Co-development PartnerTD&H Engineering completed the acquisition of GPD Consulting Engineers, a renowned leader in Mechanical, Electrical and Plumbing (MEP) Engineering. This acquisition represents a significant milestone in TD&H's growth and innovation strategy, expanding their service offerings to include MEP services.

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Otak: Pacific Northwest engineering, planning, and design firm providing civil, structural, water resources, and transportation services; comparable in size, regional footprint (WA/OR), and public-sector focus.
• J-U-B Engineers: Employee-owned regional engineering firm in the Inland Northwest/Intermountain West offering transportation, water, civil, structural, and surveying services to public agencies; comparable in size, ESOP ownership model, and rural/municipal client base.
• DOWL: Alaska/Yellowstone-region multi-discipline engineering firm providing transportation, water, civil, structural, and environmental services to government and private clients; comparable scale and similar public-sector client base.
• Parametrix: Pacific Northwest-headquartered engineering firm providing transportation, water, environmental, and structural services to municipal, state, and federal clients; comparable in size, geography overlap (WA/Mountain West), and public-sector focus.
• Morrison-Maierle: Montana-headquartered, employee-owned multi-discipline engineering firm of comparable size offering civil, structural, water/wastewater, surveying, and construction services across the Mountain West; the closest like-for-like competitor to TD&H in geography, ownership model, and service mix.
• Widseth Smith Nolting: Mid-sized employee-owned engineering, architecture, and surveying firm in the Upper Midwest with similar service breadth and municipal/state DOT client mix; comparable in ownership structure and project types.
• KLJ Engineering: Mid-sized regional engineering firm headquartered in the Northern Plains offering transportation, civil, structural, environmental, and surveying services to public and private clients; closely comparable in service mix and reliance on state DOT and municipal work.

Broad incumbents

• HDR: Large global AEC firm with deep transportation, water, and federal practice; competes with TD&H on Montana DOT and federal work but at a much larger scale, representing a broad incumbent rather than a head-to-head competitor on smaller municipal jobs.
• Jacobs Solutions: Global engineering and professional services firm with major federal, water, and transportation practices; competes for larger federal and state DOT pursuits that TD&H sometimes enters as a subconsultant.

Emerging players

• PreTek Group (precast engineering peers): Specialized precast/prestressed concrete engineering firm providing Tekla-based shop drawings and BIM services for precast producers; closest pure-play specialist competitor to TD&H's precast concrete engineering service line.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about TD&H Engineering