Fathom 4 LLC

Fathom 4 LLC, a service-disabled veteran-owned small business (SDVOSB) headquartered in Charleston, South Carolina, provides C4ISR engineering, integration, and technical sustainment services to the Department of Defense as a prime contractor on Seaport Next Generation (Seaport-NXG) vehicle task orders and as a subcontractor to major defense integrators. The company operates as a for-profit limited liability corporation and competes across both set-aside (SDVOSB and Total Small Business) and full-and-open federal procurement vehicles, with recent activity shifting toward larger set-aside vehicles and GWAC positions.

Customer concentration is heavily skewed toward Navy and Marine Corps programs. The top three funding agencies account for the entire identified potential-value base: the Department of the Navy Naval Sea Systems Command (NAVSEA) anchors $10 billion in combined potential value across four awards, the United States Marine Corps holds nine awards worth $228.5 million combined potential value, and the Department of the Navy Information Warfare Systems Command carries five awards valued at $14 million. GSA Federal Acquisition Service and the Department of the Navy Naval Facilities Engineering Command round out the active set. This concentration reflects Fathom 4's strategic position on Seaport-NXG, which placed twelve task orders carrying $228.5 million in combined potential value, and on two newly awarded GSA GWACs: the OASIS+ Total Small Business IDIQ (awarded December 2024) and the OASIS+ Service-Disabled Veteran-Owned Small Business IDIQ (awarded September 2024). Fathom 4 also holds a GSA Multiple Award Schedule (Federal Supply Schedule) contract with a $7 million ceiling and October 2028 completion date, offering forty labor categories at hourly rates ranging from $32.72 to $144.50 across professional services, information technology, management consulting, and engineering support with no security-clearance requirements.

Recent prime delivery-order activity demonstrates engineering-heavy scope. Fathom 4 received two large Marine Corps orders on February 17, 2026: a $25.6 million delivery order for sensing and information operations classified projects at Naval Information Warfare Center Atlantic and a $76.7 million order for sensing and information operations integrated product team engineering and technical support to terrestrial and human intelligence programs, both under Seaport-NXG with August 2031 ultimate completion dates. An earlier Seaport-NXG delivery order from September 2023 covered Distributed Common Ground Surface System engineering and technical support, valued at $58.2 million with an April 2028 completion date; FY2024 invoicing on that order ran $5.9 million across 31 FTEs and 64,563 contractor hours, yielding a blended government-paid rate of $91.66 per hour, with 55% of contractor hours subcontracted to Science Applications International Corporation and Vickers & Nolan Enterprises LLC. Fathom 4's portfolio also includes $14.4 million in program management, engineering, and logistics support to the Marine Corps Non-Naval Biometrics Terrestrial Collection Identity Operations Integrated Project Team (awarded May 2023, completion May 2028) and a $16.6 million Marine Corps Intelligence Engineering Sustainment Support order under Seaport-NXG (awarded June 2022, completion June 2026).

Activity has grown from one award in 2022 to six awards in 2023, settling to two in 2024 and three in 2025 before two awards in 2026. Two awards carrying combined potential value of $72.6 million face ultimate completion within the next twenty-four months, creating near-term recompete exposure. The vendor's award portfolio spans primarily NAICS 541330 (Engineering Services), with secondary presence in ship building and repairing and custom computer programming. Across SCI-reportable federal service contracts, Fathom 4 invoiced $9.3 million in FY2024 on prime contracts at a median government-paid rate of $88.66 per hour, with a 10th percentile of $86.25 per hour and 90th percentile of $91.06 per hour; SCI data shows roughly 50.2 FTEs delivered to the federal government in FY2024. On prime contracts captured in SCI, 30% of contractor hours were subcontracted, with three named subcontractors reported. Fathom 4 also subcontracts to Science Applications International Corporation and Scientific Research Corporation on naval engineering, integration, and fielding support work, including transformational technology analysis for defense systems, modern vehicle fielding integration, and engineering development of baseline systems.

Fathom 4 is a Veteran Owned Small Business (VOSB) headquartered in Charleston, SC.

Founded by former Naval Officer and former US Marine, started with a simple goal: "less but better" for the Warfighter.

Two main business portfolios

1)IT Services; most of our IT work revolves around support for the USN's High Performance Computing (HPC) Center in Monterey, California.

2)C4ISR Platform Integration & Systems Engineering; we are SME's in the rapid protyping, engineering, and integration of C4ISR systems into DoD tactical vehicles.

Core Technical Capabilities:

High Performance Computing Systems Analysis

Continuous Process Improvement

Tactical Vehicle C4ISR Engineering & Integration

Technical Documentation

Modeling and Simulation

Finite Element Analysis

Holds two Prime Contracts

-Seaport-e (NAVSEA C4ISR Services IDIQ)

-Advanced Climatology Database Upgrade (NAVSUP/FNMOC)

Subcontractor on 5 large SPAWAR IDIQ contracts focusing on C4ISR Services.