UNDERWATER MECHANIX SERVICES LLC

Underwater Mechanix Services LLC specializes in underwater construction, debris removal, and navigational support services for critical federal infrastructure. Their technical expertise centers on heavy civil engineering operations in aquatic environments, including stoplog slot construction, lock and dam maintenance, and recovery of navigational equipment such as fishlift brail baskets. The firm demonstrates proficiency in complex underwater structural interventions, often requiring precision diving, marine engineering, and coordination with hydraulic systems in active waterways. Their work implies advanced capabilities in underwater welding, submerged structure modification, and mission-critical emergency response in challenging hydrological conditions. The contractor has delivered services primarily for the Department of Defense and the Department of Homeland Security, supporting infrastructure resilience and waterway operational continuity. For the DoD, they have executed debris removal and navigational asset recovery tasks essential to maintaining military and commercial shipping lanes. Their work with DHS and the W07V Endist Vicksburg reflects a focus on civil works projects tied to U.S. Army Corps of Engineers infrastructure, particularly in riverine and lock-and-dam environments. Their primary NAICS classification under 237990—Other Heavy and Civil Engineering Construction—aligns with underwater and submerged civil works, while 488330 (Navigational Services to Shipping) underscores their role in sustaining maritime access. The inclusion of 561990 suggests ancillary support services, likely encompassing logistics, site closure, or technical coordination for complex marine operations. This positions them as a niche provider in the marine civil engineering sector, serving federal agencies requiring specialized underwater construction and maintenance. Underwater Mechanix Services LLC is a small business structured as a 2J entity, based in Jacksonville, Florida, with no federal certifications on record. Their geographic positioning in a major Gulf Coast port city supports rapid deployment to inland waterways and coastal defense infrastructure across the Southeastern U.S. They operate as a specialized, mission-focused contractor with deep domain expertise in submerged engineering environments.