Manson Construction Co.
- Company typePrivate
- Founded1905
- HeadquartersSeattle, United States
- Headcount501–1,000
- GTM typeB2B
- OfferingServices
What Manson Construction Co. does
Manson Construction Co. is a private, 100% employee-owned (ESOP) marine construction contractor headquartered in Seattle, Washington, founded in 1905 by Swedish immigrant Peter Manson as a pile driving business. The company delivers four core service lines: marine construction (wharves, piers, terminals, bridges), dredging (harbor maintenance, channel deepening, beach nourishment), offshore energy services (heavy lift, rigging, subsea utilities in the Gulf of Mexico), and heavy lifts up to 1,000 tons. A modern in-house fleet of floating derricks, hydraulic and hopper dredges, and heavy lift cranes — including named vessels such as E.P. PAUP, WOTAN, GLENN EDWARDS, HAGAR, and NORSEMAN — supports operations across six regional offices spanning the U.S. West Coast, Gulf Coast, and East Coast. Cumulative project value exceeds $2.3 billion, including 50+ alternative-delivery (CM/GC, Design-Build) engagements.
The business model is project-based B2G/B2B contracting with federal agencies (NAVFAC, U.S. Navy), state DOTs (WSDOT, Caltrans), port authorities (Port of Oakland, Port of Long Beach, JAXPORT), and municipalities. Revenue is generated through competitive bidding and negotiated contracts, typically multi-year, with custom pricing based on scope, equipment, and timeline. Go-to-market is enterprise field sales — direct relationship-driven engagement with government procurement officials. Distribution is wholly direct, with no intermediaries or channel partners. In 2023 Manson launched the Manson Vendor Portal (MVP) to digitize subcontractor procurement and federal contract compliance.
Customers are almost exclusively public-sector entities, making revenue correlated with the Infrastructure Investment and Jobs Act, USACE harbor maintenance funding, and state-level port modernization budgets. Leadership transitioned in March 2025 with James McNally succeeding John Holmes as President & CEO; the CFO position is held by Jon Rodriguez (since August 2022), and Forrest Ray leads EHS since January 2023. Outside board representation includes former CFO Alan Pickerill (Expedia, retired), Mary Josephs (Verit Advisors ESOP specialist), and Arnfinn Rusten (former BergerABAM CEO), giving the board unusually deep financial and ESOP-specific governance expertise relative to a mid-market contractor.
Manson Construction Co. firmographics
Firmographics- Name
- Manson Construction Co.
- Legal name
- Manson Construction Co.
- Website
- https://mansonconstruction.com
- Company type
- Private
- Founded year
- 1905
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Ownership category
- akta.pro rank
Manson Construction Co. industry classification
Industry- Product category
- Marine Construction Services
- NAICS
- Heavy and Civil Engineering Construction (237)
- SIC
- Heavy Construction Other Than Bldg Const - Contractors (1600)
- akta.pro primary industry
- Port & Harbor Construction (Quays, Wharves, Berths) (IMAFAJAA)
- akta.pro secondary industries
- Dredging & Channel Deepening (Capital & Maintenance) (IMAFAJAB), Quay & Waterfront Civil Works (Piers, Quays, Seawalls, Dredging, Revetments) (IMAJALAF), Marine Terminals & Cargo Handling Infrastructure (RoRo, Bulk, Container) (IMAFAJAF)
Keywords
Where Manson Construction Co. is headquartered
LocationHeadquarters
- HQ city
- Seattle
- HQ country
- United States
- HQ region
- North America
Offices6 records
Markets served
Manson Construction Co. business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Infrastructure, Operations, Technology or R&D, Supply Chain, Marketing or Sales
Revenue model
- Marine Construction Contracts: Project-based marine construction contracts for government and commercial customers including harbor improvements, pier construction, bridge foundations, and coastal infrastructure projects. Revenue is generated through competitive bidding and negotiated contracts for one-time construction projects.
- Dredging Services: Dredging services for port maintenance, channel deepening, and marine sediment management for government agencies and port authorities. One-time project-based revenue from dredging contracts.
- Professional Services: Engineering, project management, and technical consulting services for marine construction projects. Professional services revenue including design-build and construction management services.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom Project-Based Pricing |
Go-to-market motion2 records
Distribution channels1 record
Marketing channels8 records
Manson Construction Co. product offering
Product offeringCore offering
Manson Construction Co. is a marine construction contractor that delivers over-water and in-water infrastructure projects including wharves, piers, terminals, marinas, bridges, harbor dredging, channel deepening, beach nourishment, offshore energy heavy lifts, and heavy marine lifting up to 1,000 tons. Work is executed under design-build, CM/GC, and traditional contract delivery for federal, state, port authority, and municipal customers across the U.S. West Coast, Gulf Coast, and East Coast.
Product overview
Manson Construction Co. offers a unified portfolio of marine infrastructure services organized around five core service lines: Marine Construction, Dredging, Offshore Energy, Heavy Lifts, and Equipment Fleet management. The company operates as a full-service general contractor with in-house engineering capabilities, supported by a modern fleet of floating derricks, hydraulic dredges, hopper dredges, barges, and auxiliary equipment. Their services are delivered through regional operations across North America, supported by a proprietary vendor management platform called the Manson Vendor Portal (MVP) for subcontractor and supplier engagement. The company is 100% employee-owned through an ESOP structure.
Differentiator
Problem solved
Functional benefit
Products and services
- Marine Construction Services Over-water and in-water construction services including wharves, piers, terminals, marinas, bridges, and associated marine infrastructure delivered for federal, state, port authority, and municipal customers across North America.
- Dredging Services Dredging services that restore and improve waterways nationwide, including maintenance and deepening of navigation channels, beach nourishment, and marsh building, using hydraulic and hopper dredges.
- Offshore Energy Services Offshore services including platform heavy-lift engineering, rigging, and subsea utility installation within the Gulf of Mexico, with capabilities for offshore wind and energy projects.
- Heavy Lifts Services Heavy lifting services utilizing derricks and cranes with capacities up to 1,000 tons, including vessel salvage, heavy equipment lifts, and specialized marine lifting operations.
- Equipment Fleet Modern marine construction and dredging fleet comprising floating derricks, hydraulic dredges, hopper dredges, barges, auxiliary and landside equipment, including vessels E.P. PAUP, DERRICK 24, WOTAN, ROBERT M WHITE, GLENN EDWARDS, BAYPORT, DERRICK 6, VALHALLA, HAAKON, VIKING, VALKYRIE, HAGAR, NJORD, and NORSEMAN, deployed on customer projects.
- Manson Vendor Portal (MVP) A secure web portal for current and prospective vendors and subcontractors to provide business information, supporting procurement efforts and Federal Contract compliance for Manson Construction Co.
Quantifiable outcome
- $2.3+ billion in completed projects
- +2 more outcomes
Companies that use Manson Construction Co.
Customer profileNamed customers8 records
Segments3 records
Ideal customer profiles4 records
Manson Construction Co. technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Manson Construction Co. partnerships and signals
Strategic signalScale indicators5 records
Recent moves7 records
Expansion highlights5 records
Manson Construction Co. competitors and assessment
Company assessmentBroad incumbents
- Royal Boskalis Westminster: Large global dredging and marine services contractor that competes for major US port deepening and coastal protection projects, especially on the largest hopper dredge scopes. Different scale and geography than Manson but directly competes for federal dredging awards.
- Tutor Perini Corporation: Diversified heavy civil contractor with a marine construction subsidiary (Frontier-Kemper) that competes with Manson on bridge marine foundations, piers, and heavy marine scopes. Broader portfolio than Manson but meaningful overlap on complex water infrastructure projects.
- Kiewit Infrastructure: Major North American heavy civil and infrastructure contractor with marine and bridge construction capabilities that compete with Manson on large alternative-delivery (CM/GC, Design-Build) marine and bridge projects for state DOTs and ports.
- Granite Construction: Large infrastructure contractor with water resources and marine construction operations that overlap with Manson on port, dam, and coastal infrastructure projects, particularly in the Western US where Manson also has a strong presence.
- AECOM: Global infrastructure consulting and construction firm with a substantial marine and coastal practice that competes with Manson for design-build and program management work on ports, harbors, and coastal resilience projects for the same federal and port clients.
Direct peers
- Weeks Marine: Privately held US marine construction and dredging contractor with a comparable hopper dredge and heavy lift fleet. Weeks competes head-to-head with Manson on East Coast and Gulf marine construction, bridge foundations, and dredging scopes for government and port clients.
- Great Lakes Dredge & Dock Corporation: Largest US dredging contractor, directly competing with Manson on harbor maintenance dredging, channel deepening, and coastal protection projects for the Army Corps of Engineers and port authorities. Both firms compete for the same federal dredging bid pipeline.
- Orion Marine Group: Public marine specialty contractor providing marine construction, dredging, and commercial diving services across US waterways. Orion overlaps with Manson on pier/wharf construction, bridge foundations, and dredging, serving similar federal, state, and port authority customers.
- Cashman Equipment Corp: Heavy marine construction and dredging firm operating on the East Coast with a comparable fleet of derricks, cranes, and barges. Cashman competes with Manson on bridge marine foundations, port infrastructure, and offshore heavy lift scopes.
Regional players
- Mortenson Construction: Major US contractor with growing marine and heavy civil capabilities, particularly in the Pacific Northwest and Gulf regions where Manson operates. Competes with Manson on alternative-delivery bridge and infrastructure projects for state DOTs and federal agencies.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Manson Construction Co. social profiles
Digital presenceManson Construction Co. financial estimates
Financial estimateRevenue estimate
Valuation estimate
Manson Construction Co. leadership team
Management profileNumber of profiles
Profiles21 records
Manson Construction Co. funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Manson Construction Co. 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 Manson Construction Co.
What does Manson Construction Co. do?
Manson Construction Co. is a marine construction contractor that delivers over-water and in-water infrastructure projects including wharves, piers, terminals, marinas, bridges, harbor dredging, channel deepening, beach nourishment, offshore energy heavy lifts, and heavy marine lifting up to 1,000 tons. Work is executed under design-build, CM/GC, and traditional contract delivery for federal, state, port authority, and municipal customers across the U.S. West Coast, Gulf Coast, and East Coast.
Is Manson Construction Co. a public or private company?
Manson Construction Co. is a private company. It is classified as management employee owned and is currently operating.
When was Manson Construction Co. founded?
Manson Construction Co. was founded in 1905. It employs 501 to 1,000 people.
Where is Manson Construction Co. based?
Manson Construction Co. is headquartered in Seattle, United States, in the North America region.
How does Manson Construction Co. make money?
Three revenue lines are on record. Marine Construction Contracts are the primary driver. The others are dredging Services and professional Services.
Who are Manson Construction Co.'s main competitors?
Broad incumbents on record are Royal Boskalis Westminster, Tutor Perini Corporation, Kiewit Infrastructure, Granite Construction and AECOM. Direct peers are Weeks Marine, Great Lakes Dredge & Dock Corporation, Orion Marine Group and Cashman Equipment Corp. Mortenson Construction is listed as a regional player.
Does Manson Construction Co. have an API?
No public API is recorded for Manson Construction Co..
What industry is Manson Construction Co. in?
Manson Construction Co.'s product category is Marine Construction Services. Its primary akta.pro industry code is IMAFAJAA, Port & Harbor Construction (Quays, Wharves, Berths), with a secondary code of IMAFAJAB, Dredging & Channel Deepening (Capital & Maintenance). Its NAICS code is 237 and its SIC code is 1600.