Gray & Osborne
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.
- Company typePrivate
- Founded1935
- HeadquartersSeattle, United States
- Headcount101–250
- GTM typeB2B
- OfferingServices
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.
Gray & Osborne firmographics
Firmographics- 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
Gray & Osborne industry classification
Industry- 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
Where Gray & Osborne is headquartered
LocationHeadquarters
- HQ city
- Seattle
- HQ country
- United States
- HQ region
- North America
Offices6 records
Markets served
Gray & Osborne business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- 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
Gray & Osborne product offering
Product offeringCore 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.
Companies that use Gray & Osborne
Customer profileNamed customers1 record
Segments3 records
Ideal customer profiles1 record
Gray & Osborne technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Gray & Osborne partnerships and signals
Strategic signalScale indicators3 records
Recent moves4 records
Expansion highlights4 records
Gray & Osborne competitors and assessment
Company assessmentBroad 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
Gray & Osborne social profiles
Digital presenceGray & Osborne financial estimates
Financial estimateRevenue estimate
Valuation estimate
Gray & Osborne leadership team
Management profileNumber of profiles
Gray & Osborne funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Gray & Osborne M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Gray & Osborne
What does Gray & Osborne do?
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.
Is Gray & Osborne a public or private company?
Gray & Osborne is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Gray & Osborne founded?
Gray & Osborne was founded in 1935. It employs 101 to 250 people.
Where is Gray & Osborne based?
Gray & Osborne is headquartered in Seattle, United States, in the North America region.
How does Gray & Osborne make money?
One revenue line is on record: engineering Consulting Services.
Who are Gray & Osborne's main competitors?
Broad incumbents on record are HDR Inc., Tetra Tech, Stantec and AECOM. Direct peers are Parametrix, Carollo Engineers and Brown and Caldwell. Regional players are Otak, KPFF Consulting Engineers and David Evans and Associates.
Does Gray & Osborne have an API?
No public API is recorded for Gray & Osborne.
What industry is Gray & Osborne in?
Gray & Osborne's product category is Municipal Engineering Services. Its primary akta.pro industry code is IMAFAAAG, Public Works General Contracting. Its NAICS code is 2371 and its SIC code is 8700.