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Donjon Marine acquired by Tallvine Partners
Tallvine intends to continue investing to modernise Donjon’s marine fleet and expand into new geographic markets
Donjon Marine has been acquired by investment group Tallvine Partners as it says it is building a marine infrastructure platform across North America.
Miami, Florida-based Tallvine said it will invest in Hillside, New Jersey-headquartered Donjon Marine and keep the company’s existing management in place to expand its marine, shipbuilding and salvage services.
This transaction is described as “a truly transformative moment” for Donjon Marine by Donjon Marine chief executive John A Witte, Jr.
Tallvine said the acquisition marks the creation of its third investment platform in the US and its first in North American marine infrastructure.
According to its partners, this deal should also lead to further investment in Donjon’s fleet and expansion into new geographic markets and potentially more strategic acquisitions.
Founded in 1964, Donjon provides emergency response, salvage, wreck removal and environmental remediation, plus dredging, heavy lift and towing using a fleet of more than 70 specialised vessels and over 270 employees.
It maintains navigable waterways and accessible harbour infrastructure and supports the construction of marine infrastructure across the US.
Donjon Marine also has a processes centre for dredged spoil from New York and New Jersey harbours and a shipyard in the Great Lakes with a drydock and production areas.
One of its most high-profile projects in the past two years was removing the wreckage of a Baltimore highway bridge that was struck and destroyed by container ship Dali in March 2024.
“The launch of our marine infrastructure platform and acquisition of Donjon Marine underscore our commitment to investing in resilient, essential infrastructure that supports global commerce, advances environmental stewardship, and delivers stable, recurring cash flows,” said Tallvine Partners chief executive and partner Thomas Lefebvre.
Under Tallvine, Donjon Marine will continue to operate independently with John Witte as chief executive, supported by Thomas Witte and Paul Witte in the executive team.
Thoroughbred, led by co-founders and managing partners Charles Wesley and Aaron Bowlds will serve as an industrial partner in Tallvine’s investment platform.
“With a shared commitment to long-term investment, strategic growth, and innovation, we are poised to build upon Donjon Marine’s legacy, expand our reach, and continue to provide services to our clients while seizing exciting new opportunities in the marine industry,” said John Witte.
Tallvine focuses on middle-market infrastructure opportunities across the energy and utilities, transportation and logistics, and communications sectors in North America.
We view this acquisition and partnership as a highly compelling opportunity to build a leading marine infrastructure platform across North America,” said Tallvine partner Victor Sosa.
“We look forward to working closely with the team to pursue exciting initiatives, including expanding our geographic reach and service offerings, driving the growth and modernisation of our fleet, and executing strategic acquisitions in the sector.”
At the beginning of September 2025, Donjon Marine won a US$8.2M contract from the New York District of the US Army Corps of Engineers for maintenance dredging of the Bronx River federal navigation project. Donjon will dredge shallow sections of the river until January 2026 to facilitate safe navigation along this waterway.
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