Donjon Marine Co., Inc.

What Donjon Marine Co., Inc. does

Donjon Marine Co., LLC is a US-based marine infrastructure company founded in 1964 by J. Arnold Witte and headquartered in Hillside, New Jersey, with primary operational facilities in Port Newark. The company delivers an integrated portfolio of marine services—marine salvage, dredging, marine demolition, diving, heavy-lift, marine engineering, marine transportation and towing, and shipbuilding—through a controlled fleet of more than 70 specialized vessels, including 12 tugs, four dredges, five crane barges (anchored by the 1,000-ton-capacity Chesapeake 1000), multiple scow series, deck barges, and emergency-response assets. Its commercial model is project- and contract-based, serving federal and state government agencies (notably the US Army Corps of Engineers and federal emergency-response engagements such as the Baltimore bridge wreckage removal following the Dali container ship incident), domestic and international maritime operators, and construction/development clients requiring turnkey marine solutions; an in-house landfill network in New Jersey gives Donjon a unique vertically-integrated capability for environmentally sensitive dredged material processing and disposal on the East Coast.

The business is asset-intensive and certification-driven: vessels hold American Bureau of Shipping classifications, USCG Certificates of Inspection, ISM Safety Management and International Ship Security Certificates, AWO-RCP status, Cargo Gear Certificates, and National Cargo Bureau certifications, and the company holds membership in the International Salvage Union and OPA '90 Forum. Differentiated capabilities include 24/7 emergency marine casualty response, single-crane lifts to 1,100 tons and multiple-crane lifts exceeding 4,000 tons, and engineering depth supported by staff with more than 200 years of combined experience. Pricing is not publicly disclosed; revenue mechanics are tied to negotiated government and commercial contracts of varying scale (e.g., a disclosed US$8.2 million USACE maintenance-dredging award).

In September 2025, Donjon was acquired by Miami-based Tallvine Partners as the founding asset of a new North American marine infrastructure platform, ending 60+ years of founder-led independent ownership. Under Tallvine, the company has stated plans for fleet modernization and geographic expansion (including into West Coast markets), and the platform added Lind Marine, LLC as a second acquisition in May 2026, signaling an active consolidation strategy around the Donjon operating base.

Name

Donjon Marine Co., Inc.

Legal name

Donjon Marine Co., LLC

Website

http://donjon.com

Company type

Private

Founded year

1964

Operating status

Operating

Headcount range

51–100 employees

Short description

Donjon Marine Co., LLC is a 60+ year-old Northeast US marine infrastructure operator providing integrated salvage, dredging, heavy-lift, demolition, diving, towing, and shipbuilding services to government and commercial maritime clients through a 70+ vessel fleet.

Ownership category

akta.pro rank

Product category

Marine Infrastructure Services

NAICS

Support Activities for Water Transportation (4883), Ship Building and Repairing (336611), Ship and Boat Building (3366)

SIC

Ship & Boat Building & Repairing (3730), Water Transportation (4400)

akta.pro primary industry

Cargo Handling & Lifting Equipment (Cranes, Derricks, Hoists) (IMAJAIAB)

akta.pro secondary industries

Underwater Inspection, Maintenance & Repair (UWILD, Diving/ROV, In-water Cleaning) (IMAJAFAJ), Marine Terminals & Cargo Handling Infrastructure (RoRo, Bulk, Container) (IMAFAJAF), Project Management & Owner’s Engineering / Technical Consultancy (Spec Writing, Bid Support, Site Support) (IMAJAGAO)

Keywords

• Marine salvage services
• Marine dredging services
• Heavy-lift derrick barge
• Marine transportation towing
• Marine engineering services

Headquarters

HQ city

Hillside

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Marine Salvage Services: Marine salvage and salvage-related services including emergency response, wreck removal, and casualty response for U.S. and foreign marine communities. Provides tugs, derricks, barges, pumping systems, and dive systems for salvage operations.
2. Dredging Services: Maintenance and navigation improvement dredging projects with turnkey capabilities including upland and subaqueous ocean disposal. Includes environmentally sensitive material processing and disposal through company-owned New Jersey landfills.
3. Heavy-Lift Services: Heavy-lift derrick barge services including cargo lifts, salvage support, construction and demolition activities. Also includes lashing/securing services for cargo onto rail cars, deck barges, and transporters.
4. Marine Transportation and Towing: Worldwide marine transportation services including marine towing, floating derrick barge services, and barge transportation for bulk and break-bulk commodities. Includes ABS loadlined and USCG-inspected platforms.
5. Government Contracts: Contracts with government agencies including US Army Corps of Engineers for maintenance dredging and infrastructure projects.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Donjon Marine Co., LLC is a marine infrastructure company that delivers turnkey services through an integrated fleet of more than 70 specialized vessels. Core offerings include maintenance and navigation dredging, marine salvage and emergency response, heavy-lift derrick barge operations, marine demolition, marine diving, marine transportation and towing, marine engineering, and shipbuilding/repair. Services are delivered primarily in the Northeast US to federal and state government agencies and to maritime industry clients.

Product overview

Donjon Marine Co., LLC is a marine infrastructure company offering a comprehensive suite of marine services through its integrated fleet of over 70 vessels. The company's core service offerings include dredging, marine salvage, demolition, diving, heavy-lift, engineering, marine transportation/towing, and shipbuilding. The vessel fleet consists of distinct categories—tugs (12 vessels), dredges (4 vessels), crane barges (5 vessels including the 1,000-ton capacity Chesapeake 1000), scow/barge fleets (DS-Series, Witte 2300/2800/3300/4000 Series), deck barges, and emergency response/support vessels. Donjon operates as a unified platform where these vessel types work in concert to deliver turnkey solutions for waterways, coastal regions, and harbor infrastructure projects.

Differentiator

Problem solved

Functional benefit

Products and services

• Dredging Services
• Marine Demolition
• Marine Salvage
• Marine Diving Services
• Heavy-Lift Services
• Marine Engineering Services
• Marine Transportation and Towing
• Shipbuilding and Repair

Quantifiable outcome

• Single-crane lifts up to 1,100 tons; multiple-crane lifts exceeding 4,000 tons
• +2 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators5 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Resolve Marine Group: Global emergency response and marine salvage specialist with comparable tugs, firefighting equipment, and casualty response assets — a direct competitor in the salvage segment where Donjon built its brand.
• Moran Towing Corporation: Major US tug and barge operator with deep Northeast presence, harbor towing services, and emergency response capabilities — closely comparable to Donjon's tug fleet and Port Newark operations.
• Ballard Marine Construction: Marine construction, diving, and heavy-lift services contractor with comparable underwater construction and emergency response capabilities, particularly on infrastructure repair projects.
• Bouchard Transportation Co. Northeast-based marine transportation, tug and barge operator with ATB fleet and petroleum/aggregate transport — comparable vessel profile and regional focus to Donjon's tug and barge transportation services.
• McAllister Towing & Transportation: Family-owned tug and marine transportation company operating along the US East Coast with comparable harbor towing, barge transportation, and emergency response services overlapping with Donjon's marine transportation segment.
• Weeks Marine: Large US marine construction and dredging contractor with comparable heavy-lift crane barges, hopper dredges, and federal USACE contract base — directly competes with Donjon in dredging and coastal infrastructure work along the East and Gulf Coasts.
• Manson Construction Co. Heavy marine construction and dredging firm with similar large crane barges, clamshell and hopper dredges, and USACE contract relationships — a direct competitor particularly as Donjon expands geographically.

Regional players

• Dutra Group: West Coast-focused heavy marine construction and dredging contractor with comparable crane barges and USACE work — a relevant regional peer for Donjon's planned West Coast expansion under Tallvine ownership.

Broad incumbents

• Great Lakes Dredging & Dock Corporation: Largest US dredging contractor and publicly listed marine infrastructure services firm; broader geographic footprint and deeper capital base make it a broad incumbent competing with Donjon in USACE maintenance and capital dredging tenders.

Others

• Donjon-SMIT (joint venture history): Historical joint venture between Donjon and SMIT (now Boskalis) for major salvage operations; reflects Donjon's positioning within the broader salvage alliance ecosystem.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/DonjonMarine
• YouTubeyoutube.com/@donjonmarine
• Facebookfacebook.com/DonjonMarine
• LinkedInlinkedin.com/company/donjon-marine-co.-inc.
• Instagraminstagram.com/donjonmarine

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

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 Donjon Marine Co., Inc.