What Senesco Marine does

Senesco Marine is a U.S. shipbuilding and repair yard founded in 1999 and headquartered in North Kingstown, Rhode Island, operating as a subsidiary of the Reinauer Group. The company constructs steel and aluminum vessels including double-hulled barges, tugboats, articulated tug-barge (ATB) units, passenger ferries, offshore wind support vessels (CTVs, SOVs, feeder barges), and—through a recent partnership—autonomous uncrewed surface vehicles for defense applications. Senesco's core technology stack includes CNC plasma cutting, a full-function panel line for block construction, in-house dry dock transportation for vessels up to 750 tons, and integration of BAE Systems' HybriGen Assist hybrid diesel/electric propulsion system. The company holds ISO 9001 certification and builds to ABS, DNV-GL, and USCG regulatory standards.

The business operates across three primary revenue streams: new vessel construction (custom builds for commercial and government customers), repair and maintenance services (via a three-acre repair yard with two dry docks of 4,500-ton and 2,300-ton capacity), and offshore wind vessel and component fabrication. Senesco's customer base is dominated by government and quasi-government entities, including the Maine Department of Transportation (hybrid ferries for Maine State Ferry Service), the Delaware River and Bay Authority ($78.6 million Cape May-Lewes ferry contract), and the U.S. Navy/Department of Defense (autonomous USVs via the Havoc partnership). Pricing is project-based and quote-driven, with each vessel build or repair scoped individually.

Commercial motion is exclusively direct enterprise and government sales, led by President Ted Williams (former U.S. Navy captain with 31 years of service) and VP/GM Mike Foster (38 years of shipbuilding experience). The company employs approximately 200 people across its 30+ acre waterfront facility and operates without external institutional investment. Geographic focus is the U.S. Northeast, with strategic positioning at the hub of domestic offshore wind development. Recent strategic expansion into defense autonomous vessels through the Havoc partnership, combined with multi-year ferry contracts, signals a broadening of the company's addressable market beyond traditional commercial shipbuilding.

Name

Senesco Marine

Legal name

Senesco Marine, LLC

Website

https://senescomarine.com

Company type

Private

Founded year

1999

Operating status

Operating

Headcount range

251–500 employees

Short description

Senesco Marine is a Rhode Island shipbuilding and repair yard, subsidiary of the Reinauer Group, that constructs double-hulled barges, tugboats, hybrid ferries, offshore wind vessels, and autonomous uncrewed surface vehicles for government, defense, and commercial maritime customers in the U.S. Northeast.

Ownership category

akta.pro rank

Product category

Shipbuilding and Vessel Repair

NAICS

Ship Building and Repairing (336611), Ship and Boat Building (3366)

SIC

Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Retrofits & Modernization (Scrubbers, Ballast Water, Alternative Fuels, Energy-Saving Devices) (IMAJAFAH)

akta.pro secondary industries

Retrofits, Upgrades & Compliance Conversions (Scrubbers, BWTS, Alternative Fuels, Energy-Saving Devices) (TLAHAMAI), Specialized Cargo Vessels (Cement/Asphalt/Woodchip/Live-Animal) Shipbuilding (IMAJAAAL)

Keywords

• Shipbuilding services
• Vessel repair
• Offshore wind vessels
• Ferry construction
• Marine fabrication

Headquarters

HQ city

North Kingstown

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. New Vessel Construction: Custom shipbuilding services including builds from existing design, design concepting with in-house naval architects, steel and aluminum fabrication. Projects include barges, tugs, ferries, offshore wind support vessels.
2. Repair and Maintenance Services: In-water and out-of-water repairs on vessels of all sizes, including dry dock services, steel/aluminum repairs, scheduled inspections, full vessel retrofitting, and modernization upgrades.
3. Offshore Wind Fabrication: Aluminum fabrication and vessel construction specifically for offshore wind industry, including crew transfer vessels, feeder bargers, offshore support vessels, and various structural components like monopile grillages and cable baskets.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Senesco Marine designs, fabricates, and delivers custom steel and aluminum vessels — including double-hulled barges, tugboats, articulated tug-barge (ATB) units, passenger-vehicle ferries (including hybrid diesel/electric), offshore wind support vessels (CTVs, SOVs, feeder barges), and (via partnership with Havoc) autonomous uncrewed surface vehicles for defense. The company also operates a repair yard with two dry docks (up to 4,500 tons) providing in-water and out-of-water repairs, scheduled inspections, retrofitting, and modernization services.

Product overview

Senesco Marine operates as a full-service shipbuilding and repair yard offering new vessel construction and repair services. The core offerings include new construction shipbuilding (steel and aluminum fabrication with CNC plasma cutting and panel line construction), repair yard services (in-water and out-of-water repairs with two dry docks), and offshore wind vessel fabrication (Crew Transfer Vessels, Support Vessels, and wind farm components). Notable product lines include hybrid ferries featuring BAE Systems' HybriGen Assist propulsion technology and, through a partnership with Havoc, autonomous uncrewed surface vehicles for defense applications. The company has also historically built double-hulled barges, articulated tug-barge tugs, and provides repair services for research vessels. All vessels are built to American Bureau of Shipping (ABS), DNV-GL, and USCG regulatory standards.

Differentiator

Problem solved

Functional benefit

Products and services

• New Construction Shipbuilding Full-service new-build shipbuilding for commercial and government customers, including builds from existing design, design concepting with in-house naval architects, steel and aluminum fabrication, CNC plasma cutting, panel line block construction, in-house transportation, and launch via Senesco's own dry docks. Delivered vessels include double-hulled barges, tugboats, ATB units, ferries, offshore wind support vessels, and hybrid/autonomous platforms. Vessels are built to ABS, DNV-GL, and USCG regulatory standards.
• Repair Yard Services In-water and out-of-water vessel repair services for vessels of all sizes, including dry-docking on the Leslie G (4,500 ton) and DD2 (2,300 ton) dry docks, steel and aluminum repairs, scheduled inspections, full vessel retrofitting and modernization, and installation of systems such as ballast water treatment. Customers include commercial shipping operators, ferry services, and research institutions.
• Offshore Wind Vessel and Component Fabrication Steel and aluminum fabrication services for the offshore wind industry, including purpose-built vessels (Crew Transfer Vessels, Feeder Barges, Offshore Support Vessels, Service Operation Vessels) and fabricated wind farm components (monopile grillages, cable baskets, anode cages). For offshore wind developers and operators needing purpose-built aluminum vessels for crew transfer and offshore operations.
• Hybrid Diesel/Electric Ferry Construction Construction of passenger-vehicle ferries equipped with hybrid diesel/electric propulsion, integrating BAE Systems' HybriGen Assist technology (electric motors, variable-speed generators, battery-based energy storage, power regeneration, electric boost). Delivered to state ferry services for routes such as Maine State Ferry Service (serving 500,000 riders and 190,000 vehicles annually) and Delaware River and Bay Authority's Cape May-Lewes route ($78.6M project).
• Autonomous Uncrewed Surface Vehicle (USV) Manufacturing Manufacturing of autonomous uncrewed surface vehicles in partnership with Havoc, integrating collaborative autonomy software with Senesco's hulls and platforms to produce mission-ready USVs for defense applications such as contested logistics in the Pacific, and broader defense and commercial use.

Quantifiable outcome

• Successfully built and delivered over 25 vessels including double-hulled fuel and chemical barges
• +2 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Five partnerships are on record, tiered core, major and flagship.

• HavoccoreTechnology or Integration · 6 May 2026Senesco Marine and Havoc announced partnership on May 6, 2026 to manufacture autonomous uncrewed surface vehicles (USV). Senesco provides shipbuilding capabilities while Havoc contributes AI and collaborative autonomy software systems. Vessels are intended to support contested logistics operations in the Pacific for defense applications. The initiative is supported by federal investments including grants from the U.S. Maritime Administration.
• BAE SystemscoreTechnology or Integration · 8 June 2022Collaboration with BAE Systems for HybriGen Assist hybrid propulsion system on Maine State Ferry Service vessels. BAE Systems provides electric propulsion solution including electric motors, variable-speed generators, battery-based energy storage system, and vessel auxiliary power. Senesco integrates this technology into vessel construction.
• Maine Department of TransportationcoreStrategic or Co-development PartnerSenesco Marine selected by Maine DOT to build new passenger vessel for Maine State Ferry Service. Project includes 154-foot hybrid passenger-vehicle ferry with BAE Systems propulsion. The ferry will serve island communities of Vinalhaven, North Haven, Islesboro, Swans Island, Frenchboro and Matinicus.
• Delaware River and Bay AuthoritymajorStrategic or Co-development Partner$78.6 million hybrid ferry construction project for Cape May-Lewes ferry line. Construction beginning 2026, completion expected summer 2029. First hybrid vessel on the route, replacing over 40-year-old diesel ship.
• Reinauer GroupflagshipOthersParent company relationship. Senesco Marine is proud to be a part of the Reinauer Group, which provides strategic backing and integration into a broader maritime services network.

Scale indicators6 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Kvichak Marine Industries: Seattle-based aluminum workboat builder serving wind farm support, pilot, patrol, and research markets. Comparable specialty aluminum vessel focus and overlap with Senesco's offshore wind and government segments.
• Gladding-Hearn Shipbuilding: Somerset, MA shipyard specializing in pilot boats, patrol craft, and passenger ferries. Directly comparable niche shipbuilder competing for the same Northeast ferry and government operator contracts as Senesco.
• Blount Boats: Rhode Island-based shipyard building small commercial vessels, ferries, and trawlers. Most directly comparable regional peer given similar size, location on Narragansett Bay, and overlap in commercial vessel construction.
• Eastern Shipbuilding Group: Florida-based shipyard building offshore supply vessels, ferries, and tugs for commercial and government customers. Closely comparable in vessel categories built, ABS/USCG compliance focus, and project-based custom contracts.
• Marine Hydraulics International: Norfolk, VA ship repair yard focused on Navy and commercial vessel maintenance, modernization, and dry-docking. Comparable repair-segment offering with similar government customer base.
• Conrad Shipyard: Louisiana shipyard building ATBs, tugs, OSVs, and barges. Comparable product mix to Senesco's commercial maritime segment (barges, tugs, articulated tug-barge units) with similar custom newbuild model.

Regional players

• Derecktor Shipyards: Connecticut-based shipyard historically building yachts and commercial vessels. Comparable Northeast regional shipbuilding footprint though focused on different vessel segments.

Broad incumbents

• Vigor Industrial: Pacific Northwest ship repair and new construction yard serving Navy, Coast Guard, and commercial markets. Broader-scale incumbent with similar repair-yard + newbuild model and USCG/ABS regulatory capabilities.
• Bollinger Shipyards: Large Louisiana-based shipyard building cutters, patrol boats, and OSVs for Coast Guard, Navy, and commercial customers. Larger, established competitor with broader federal contracting footprint and multi-site capacity.

Emerging players

• Robert Allan Ltd: Canadian naval architecture firm designing specialized tugs, OSVs, and fireboats. Comparable in design-and-build niche for commercial workboats, particularly tug and barge segments where Senesco also competes.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/senescomarine
• LinkedInlinkedin.com/company/senesco-marine-llc

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds1 record

Investors1 record

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 Senesco Marine