Welcome to Caldwell Marine International
Caldwell Marine International is a specialized marine construction contractor with deep experience in submarine power cable, fiber optic cable, offshore and nearshore cable support, heavy civil marine construction, marine route preparation, cable burial, repair, maintenance, and complex waterfront infrastructure.
Headquartered in New Jersey with marine yard operations in Staten Island, CMI supports projects throughout the United States and internationally. Our work is built around the demands of marine construction: challenging access, variable weather windows, constrained work areas, sensitive environmental conditions, complex stakeholder coordination, and strict installation tolerances.
Our teams combine field-proven marine construction experience with in-house engineering support, custom equipment configurations, specialized cable handling systems, marine survey capabilities, and a modular equipment philosophy that allows us to mobilize efficiently to difficult locations.
From submarine cable installation and post-lay burial to cofferdams, outfalls, piers, docks, bulkheads, route clearance, and HDD marine support, CMI provides the technical resources and execution experience needed to deliver projects where failure is not an option.
A Part of Something Bigger
CMI is part of JAG Companies, a family of infrastructure contractors with complementary expertise in heavy civil construction, underground utilities, trenchless construction, marine construction, and complex infrastructure delivery.
With the added strength of Northeast Remsco Construction and Huxted Trenchless, CMI can support clients with integrated solutions that extend beyond the waterline — including HDD shore approaches, landfall support, utility infrastructure, treatment plant work, and complex civil construction interfaces.
Together, the JAG Companies provide clients with broader resources, deeper technical capability, and the ability to solve project challenges that require coordination across marine, trenchless, and heavy civil disciplines.
Safety as Culture
Marine construction requires planning, communication, and disciplined execution at every stage. At CMI, safety is built into our means and methods, our equipment planning, our field operations, and our project decision-making.
Careers at JAG
We are serious about reputation, work ethic, and team accomplishment. If you are driven by complex work and high standards, there may be a place for you here.
News and Events
In a specialized industry, experience matters. See how CMI and the JAG Companies are advancing marine infrastructure, cable installation, and complex construction across the country.
Let’s talk about your next marine construction challenge.
Every marine project has unique technical, logistical, environmental, and schedule requirements. CMI brings the experience, equipment, and problem-solving capability to evaluate those conditions early and execute with confidence.
Whether your project requires submarine cable installation, cable repair, cable burial, HDD marine support, heavy civil marine construction, or specialized marine equipment, our team is ready to help determine the right approach.
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