What GPI does

Greenman-Pedersen, Inc. (GPI) is a 100% employee-owned professional engineering firm founded in 1966 and headquartered in Babylon, New York. The company delivers consulting engineering, planning, surveying, mapping, construction management, and inspection services across transportation, building systems, marine/underwater, environmental, and geospatial domains. GPI operates two wholly-owned specialized subsidiaries: Underwater Engineering Services, Inc. (UESI), which provides commercial diving, marine construction, and nuclear-plant underwater maintenance; and GPI Geospatial, Inc., which delivers aerial and mobile LiDAR, photogrammetry, GIS, and UAS-based mapping with 47+ years of operating history. Core service lines include highway and bridge engineering, intelligent transportation systems (ITS), building systems (MEPS), environmental services, water/wastewater, and planning/consulting, with marquee engagements such as the $3.1B Brent Spence Bridge Corridor and the $1.4B+ NJ Turnpike Interchange 6 to 9 program.

The firm's revenue model is professional services generated through project-based contracts, master service agreements, and direct procurement with government and enterprise clients — pricing is not publicly disclosed and varies by project scope and contract type. Its go-to-market is relationship-driven enterprise field sales targeting federal, state, and local government agencies (state DOTs, turnpike authorities, port authorities, municipalities) plus regulated utilities such as Duke Energy and the New York Power Authority. GPI pursues work via competitive bidding on government RFPs, multi-year MSAs with state DOTs (NYSDOT, WisDOT, GDOT, Delaware DOT), and joint ventures with peers such as AECOM/PB Americas and Kentucky Transportation Cabinet teams. The company distributes work through 5+ U.S. offices across the Northeast, Mid-Atlantic, Southeast, Midwest, and Florida (added via the 2021 Horizon Engineering Group acquisition), with recent acquisitions of Holbert Apple Associates (2022) and DesignTech Engineering Services (2025) extending the capability footprint. Independent validation includes ENR rankings of #83 Top 500 Design Firms, #67 Top 100 Pure Designers, #72 Top 100 MEP Giants, #25 Top Transportation Firms, and #10 Top 100 Bridge Firms.

Name

GPI

Legal name

Greenman-Pedersen, Inc.

Website

https://gpinet.com

Company type

Private

Founded year

1966

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Greenman-Pedersen, Inc. (GPI) is a 100% employee-owned engineering firm providing consulting, planning, surveying, geospatial, marine/underwater, and construction management services to federal, state, and local government agencies and regulated utilities across the United States.

Ownership category

akta.pro rank

Headquarters

HQ city

Babylon

HQ country

United States

HQ region

North America

Offices5 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 and Consulting Services: Professional engineering and consulting services provided to government and private sector clients for infrastructure projects including transportation, bridges, highways, marine, geospatial, and building systems. Revenue generated through project-based contracts, master service agreements, and term contracts with government agencies.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

GPI is a multi-discipline engineering firm that delivers planning, design, surveying, construction management, and inspection services for infrastructure projects. Core practice areas include highway/bridge engineering, intelligent transportation systems (ITS), marine engineering, building systems, environmental services, construction management & inspection, and geospatial/surveying services. The firm serves primarily public agencies and utilities across the United States through both the parent company and operating subsidiaries such as UESI and GPI Geospatial.

Product overview

GPI (Greenman-Pedersen, Inc.) is an engineering firm offering a comprehensive portfolio of infrastructure and construction services. The company's core offerings include Highway/Bridge Engineering, Intelligent Transportation Systems (ITS), Marine Engineering Services, Building Systems (MEPS), Environmental Services, Construction Management & Inspection, and Planning & Consulting. GPI operates through two wholly owned subsidiaries: Underwater Engineering Services, Inc. (UESI), which provides specialty engineering and commercial diving services, and GPI Geospatial, Inc., which offers geospatial solutions including aerial photography, LiDAR, and mobile LiDAR services. The firm serves transportation, government, energy, and infrastructure sectors across the United States.

Differentiator

Problem solved

Functional benefit

Products and services

• Highway and Bridge Engineering
• Intelligent Transportation Systems (ITS)

Quantifiable outcome

• Ranked #83 in ENR Top 500 Design Firms
• +3 more outcomes

Named customers11 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Five partnerships are on record, tiered core and minor.

• UESI (Underwater Engineering Services, Inc.)coreStrategic or Co-development PartnerUESI is a wholly owned subsidiary of GPI providing specialty engineering, commercial diving, and civil marine contractor services. UESI pioneered processes for nuclear power plant environments and provides comprehensive underwater maintenance services to power generating and industrial facilities.
• GPI Geospatial, Inc.coreStrategic or Co-development PartnerGPI Geospatial, Inc. is a wholly owned subsidiary with over 47 years of experience providing comprehensive geospatial solutions including aerial LiDAR, mobile mapping, photogrammetry, and UAS services for transportation, planning, design, and government sectors.
• AECOM and PB Americas (Joint Venture)coreStrategic or Co-development PartnerGPI formed a joint venture with AECOM and PB Americas to provide construction management services for the NJ Turnpike Interchange 6 to 9 Widening Program - the most significant construction project in the authority's 58-year history.
• Montgomery County Department of Transportation (Joint Venture)minorStrategic or Co-development PartnerGPI Geospatial participated in a joint venture contract to provide mobile mapping services for the MD 355 Bus Rapid Transit Preliminary Investigation Study, covering approximately 21.7 miles of urban roadway.
• Kentucky Transportation Cabinet Joint Venture TeamcoreStrategic or Co-development PartnerGPI participated in a joint venture team providing construction oversight and inspection services for the $900 million Louisville-Southern Indiana Ohio River Bridges Downtown Crossing project on behalf of KYTC.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• WSP Global: Large engineering professional services firm with deep transportation, bridges, and intelligent transportation systems practices serving US state DOTs and federal agencies; directly comparable across GPI's core service lines.
• Tetra Tech: Engineering and consulting firm specializing in water, environment, and infrastructure services for US public-sector clients; comparable in transportation and environmental consulting service lines.
• VHB: Engineering, planning, and design firm with transportation, bridge, and environmental practices serving Northeastern US state DOTs and municipalities; closely comparable in scale and Eastern US footprint.
• Stantec: Multi-disciplinary engineering consultancy with significant US transportation infrastructure, bridge, and water/wastewater practices serving public-sector clients; highly comparable in service mix.
• HDR: Employee-owned engineering firm providing transportation, bridge, and water infrastructure design serving US DOTs and federal clients; closely comparable in business model (employee ownership), service mix, and customer base.
• AECOM: Global infrastructure consulting firm providing transportation, bridges, highways, and construction management services to state DOTs and federal clients; GPI frequently teams with AECOM in joint ventures (e.g. NJ Turnpike Interchange 6-9 Widening).
• Michael Baker International: Engineering, planning, and consulting firm focused on transportation, bridge, and infrastructure design for US state DOTs and federal agencies; closely comparable in scale, customer base, and service mix to GPI.
• Kimley-Horn: Privately-held planning and engineering design consulting firm with strong transportation, traffic, and infrastructure practices serving US state DOTs and municipalities; comparable in culture and customer base.
• Jacobs Solutions: Engineering and program management firm with major US transportation, bridge, and geospatial practices serving state DOTs and federal agencies; directly comparable to GPI on large alternative delivery pursuits.

Broad incumbents

• Arcadis: Global design and consultancy with transportation and mobility practices serving US public-sector clients; broader incumbent that overlaps with GPI on transportation infrastructure work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/GPI1966

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries3 records

Funding overview

Funding rounds

Investors

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

M&A3 records

Investments

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

Frequently asked questions about GPI