Dead Calm Seas Marine Services LLC

Dead Calm Seas Marine Services LLC, operating as Dead Calm Seas Marine Services Division, is a Service-Disabled Veteran-Owned Small Business (SDVOSB) headquartered in St. Louis, Missouri, that provides commercial diving services to the U.S. Army Corps of Engineers as a prime contractor (80% of awards) and as a subcontractor on Department of Defense programs. The vendor holds SBA certifications as both a Veteran-Owned Small Business and SDVOSB, expiring October 24, 2028, and is a self-certified Small Disadvantaged Business competing predominantly under total small business set-asides.

Dead Calm Seas' service portfolio centers on underwater inspection, bulkhead installation, SCUBA diving operations, and remotely operated vehicle recovery supporting the Corps' civil works and water resource management missions across Kansas, Oklahoma, and Texas. Representative prime work includes a $98,320 firm fixed price delivery order from the Army Corps of Engineers for dive services supporting bulkhead placement at Toronto Lake, Kansas (awarded September 2026); a $47,140 delivery order for SCUBA diving operations at Heyburn and Oologah Lakes, Oklahoma (July 2023); and a $25,830 delivery order for trash rack and H-brace removal at Arcadia Lake, Oklahoma under total small business set-aside (March 2026). The vendor currently holds a $600,000 single-award Indefinite Delivery/Indefinite Quantity contract awarded January 15, 2026 by the Army Corps of Engineers, Tulsa District, with an ultimate completion date of January 14, 2031; this contract supersedes a prior $400,000 ID/IQ vehicle that concluded in September 2025.

All reported awards derive from a single customer: the Department of the Army Corps of Engineers accounts for 100% of the vendor's award footprint by count and potential value, with the Tulsa District serving as the primary ordering location. Dead Calm Seas places task orders under multiple Army Corps ID/IQ vehicles, including the current $600,000 contract (2 task orders, $28 thousand combined potential value) and the predecessor $400,000 contract (4 task orders, $169 thousand combined potential value). The vendor's activity profile is modest — ten total awards spanning 2022 through March 2026, with three awards in 2022, two in 2023, two in 2025, and three in 2026 — and carries minimal recompete cliff exposure (only one award with ultimate completion in the next twenty-four months). In its subcontractor role, Dead Calm Seas delivers underwater inspection services and emergency worldwide diver capabilities to HII Mission Technologies Corp on Department of Defense work (September 2025 and January 2025 awards). NAICS concentration runs to 561990 (All Other Support Services) across eight awards, with PSC coding to Z1KA (Maintenance of Dams) across seven awards, reflecting specialization in water infrastructure support.

We can provide dive systems and teams to work in a wide range of depths; from surface air to mixed gas diving.

The core group of DCS Marine Services has the combined experience of over 120 years in the Marine Construction services industry, including submarine cable installation. Our management experience and full spectrum of capabilities enable us to effectively complete our submarine cable installation projects using the most qualified personnel equipped with the latest array of specialized marine equipment.

The DCS philosophy of modular equipment design allows us to mobilize and perform anywhere a project is planned. Based in Missouri, our performance in the fields of fiber cable and submarine power cable installation is recognized both nationally and internationally.

More Services provided: Shore end cable landings, commercial diving, underwater construction, marine construction, offshore power and offshore wind, oil & gas, marine inspection, rov, outfall work, salvage