MARATHON CONSTRUCTION CORPORATION

Marathon Construction Corporation specializes in heavy civil engineering construction for military infrastructure, with deep expertise in marine and waterfront systems. The company executes complex repairs and modifications to naval facilities, including floating docks, pump rooms, flood tunnels, marine loading arms, fendering systems, and pier structures. Their technical capabilities encompass structural rehabilitation, electrical system upgrades, dock replacement, and the installation of critical mooring components such as cleats and bollards—all performed in demanding maritime environments requiring precision engineering and strict adherence to naval engineering standards. Their work demonstrates proficiency in underwater construction techniques, corrosion mitigation, and load-bearing structural retrofitting, positioning them as a trusted performer for mission-critical defense waterfront assets. The contractor maintains a consistent relationship with the Department of Defense, delivering specialized civil engineering services across multiple naval bases and maritime installations. Their portfolio reflects a focus on sustaining operational readiness through timely, high-integrity repairs to port infrastructure, ensuring uninterrupted naval operations. This recurring engagement suggests a strong understanding of DoD procurement protocols, safety regulations, and the unique constraints of military waterfront environments. Marathon Construction’s primary focus is in NAICS 237990—Other Heavy and Civil Engineering Construction—which in practice means large-scale, non-building infrastructure projects involving marine structures, earthmoving, and heavy equipment deployment. They are specialized in naval port modernization, harbor maintenance, and coastal defense infrastructure, distinguishing themselves in a niche market requiring advanced marine construction know-how and experience with military-grade specifications. As a small business structured as a 2L entity based in Lakeside, California, Marathon Construction operates with a focused geographic footprint aligned with West Coast naval facilities. While currently holding no formal government certifications, their proven track record in delivering complex, high-stakes defense construction projects establishes a strong market position within the military infrastructure sector.