Gray & Osborne

What Gray & Osborne does

Gray & Osborne, Inc. is a privately held civil and environmental engineering consulting firm headquartered in Seattle, Washington, that has served public-sector clients continuously since its founding in 1935. The firm provides planning, design, financing assistance, and construction oversight for public works infrastructure — specifically water, wastewater, stormwater, transportation, and underground utilities — for cities, counties, and special purpose districts throughout Washington State. A staff of over 145 experienced design professionals is distributed across six regional offices in Seattle, Arlington, Olympia, Vancouver, Wenatchee, and Yakima, giving the firm statewide coverage of its addressable market.

The service portfolio is organized around five core disciplines. Water engineering covers surface water filtration, spring and well development, groundwater contaminants, desalinization, water storage, pumping, and distribution. Wastewater engineering spans treatment facility planning, design, financing, and construction with emphasis on practical technology applications. Stormwater engineering addresses surface water quality and salmon recovery in the Pacific Northwest. Transportation engineering supports Washington State cities and counties in planning, financing, designing, and implementing transportation improvements. Utilities engineering addresses underground utilities maintenance, right-of-way corridor management, and trenchless technologies. A distinguishing operational feature is the firm's ability to perform most projects in-house without subconsultants, providing direct control over schedule, budget, and product quality.

The business operates on a professional services revenue model, billing municipalities, special purpose districts, and government agencies through project-based contracts and formal RFP/bidding processes. Approximately 200 government clients across Washington State constitute the customer base. Distribution is sales-led and direct, supported by a proprietary Bid Document System at gobids.grayandosborne.com for procurement intake. The firm is privately held with no disclosed funding rounds, no parent company, no institutional investors, and no M&A activity. There are no disclosed AI/ML capabilities, APIs, or software product offerings; the value proposition rests entirely on human professional expertise, regulatory familiarity, and project execution.

Name

Gray & Osborne

Legal name

Gray & Osborne, Inc.

Website

https://g-o.com

Company type

Private

Founded year

1935

Operating status

Operating

Headcount range

101–250 employees

Short description

Gray & Osborne is a Seattle-headquartered civil and environmental engineering consulting firm founded in 1935 that provides planning, design, financing, and construction oversight for water, wastewater, stormwater, transportation, and utility infrastructure projects to municipalities and special purpose districts across Washington State.

Ownership category

akta.pro rank

Product category

Municipal Engineering Services

NAICS

Utility System Construction (2371)

SIC

Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Public Works General Contracting (IMAFAAAG)

Keywords

• Municipal engineering
• Civil engineering services
• Water infrastructure engineering
• Wastewater engineering
• Stormwater management

Headquarters

HQ city

Seattle

HQ country

United States

HQ region

North America

Offices6 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 engineering services for public works projects including design, planning, financing assistance, and construction oversight for water, wastewater, stormwater, transportation, and utility infrastructure.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels2 records

Core offering

Gray & Osborne is a Washington-based civil and environmental engineering consulting firm that plans, designs, permits, and supports construction of municipal infrastructure for public agencies. Core service lines include water systems, wastewater (sewer), stormwater, transportation, and utilities engineering for cities, counties, and special purpose districts throughout Washington State.

Product overview

Gray & Osborne is a civil engineering consulting firm offering a unified portfolio of infrastructure engineering services for public works projects. The company provides five core service lines: Water, Wastewater, Stormwater, Transportation, and Utilities engineering. Services span the complete project lifecycle including planning, design, financing, and construction. The firm maintains six offices throughout Washington State with over 145 design professionals capable of completing most projects without subconsultants. Featured projects include the Gooseberry Point WWTP Facility, Union Ave & Rainier St Roundabout, and Log Cabin Road Reservoir.

Differentiator

Problem solved

Functional benefit

Products and services

• Water Systems Engineering Planning, design, permitting, and construction support for drinking water infrastructure — including source, treatment, storage, pumping, and distribution systems — for Washington municipalities and water districts.
• Wastewater (Sewer) Engineering Planning, design, permitting, and construction-phase engineering for sanitary sewer collection, pumping, and wastewater treatment facilities serving Washington cities, sewer districts, and special purpose districts.
• Stormwater Engineering Planning, design, and regulatory support for municipal stormwater conveyance, treatment, and low-impact development / NPDES compliance projects for Washington cities and counties.
• Transportation Engineering Engineering services for municipal roads, streets, intersections, and related transportation infrastructure owned and operated by Washington cities, counties, and other public agencies.
• Utilities Engineering Engineering support for other municipal utility systems (e.g., electrical, gas, communications coordination, and general utility infrastructure) for Washington public agencies and special purpose districts.

Named customers1 record

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators3 records

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• HDR Inc. Large global engineering firm with a substantial municipal infrastructure practice covering water, transportation, and utilities — competes on Washington public works bids with broader geographic reach and bench depth.
• Tetra Tech: Global consulting and engineering firm with strong water, environmental, and municipal infrastructure practices that frequently compete against regional firms like Gray & Osborne on public works projects.
• Stantec: Major international engineering consultant with established public works, water, and transportation practices; overlaps with Gray & Osborne's full-service municipal infrastructure portfolio.
• AECOM: Global infrastructure consulting firm with a major U.S. water and transportation practice; competes on large Washington public works bids and offers the kind of scale and integrated delivery Gray & Osborne faces.

Direct peers

• Parametrix: Pacific Northwest-headquartered engineering firm serving municipalities with water, wastewater, stormwater, and transportation services — a directly comparable regional competitor in Washington and Oregon.
• Carollo Engineers: National specialty consulting firm focused exclusively on water and wastewater engineering for municipalities — directly comparable to Gray & Osborne's water/wastewater core services and public-sector client base.
• Brown and Caldwell: Environmental engineering and consulting firm with deep municipal water/wastewater focus; serves similar city and special district clients and competes for comparable public works planning and design work.

Regional players

• Otak: Pacific Northwest architecture, engineering, and planning firm with water, transportation, and public infrastructure practices serving municipalities comparable to Gray & Osborne's clientele.
• KPFF Consulting Engineers: Pacific Northwest engineering firm with civil, structural, and water resources practices serving municipalities and public agencies; operates in similar geographies and competes for adjacent infrastructure work.
• David Evans and Associates: Pacific Northwest-based engineering firm providing water, transportation, and public works services to municipalities — directly overlaps Gray & Osborne's geography and service mix.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

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Revenue estimate

Valuation estimate

Number of profiles

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 Gray & Osborne