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Fathom 4

Fathom 4

Review
7.9/10
🇺🇸 Charleston, South Carolina, United States·Reviewed Jul 2026

Service-disabled veteran-owned engineering firm delivering C4ISR and defense engineering to the DoD.

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Best For
DoD and defense contractors needing SDVOSB-qualified engineering services
Industries
Defense, Government, Military Technology

About Fathom 4

Fathom 4, LLC is a Service-Disabled Veteran-Owned Small Business (SDVOSB) headquartered in Charleston, South Carolina, providing engineering services to the Department of Defense. The firm covers C4ISR design, modeling and simulation, finite element analysis, high performance computing, and technical documentation. Fathom 4 achieved Inc. 5000 recognition from 2017 to 2019 and holds ISO certification.

Who Fathom 4 Is Best For

Fathom 4 is specifically suited for DoD prime contractors and federal agencies that need SDVOSB set-aside engineering support for C4ISR, tactical vehicle systems, and simulation programs. Their Non-Traditional OTA contractor status provides additional contracting flexibility.

Why Choose Fathom 4

SDVOSB certification for set-aside contracts
Inc. 5000 recognition 2017-2019
ISO certified
Non-Traditional OTA contractor status
Charleston, SC location near major DoD installations

Things to Consider

Defense-only focus, no commercial application
Narrow service scope outside DoD engineering
Contract vehicle requirements may limit accessibility
No disclosed pricing or project minimums

Fathom 4 Services

C4ISR EngineeringModeling & SimulationFinite Element AnalysisHigh Performance ComputingTactical Vehicle EngineeringTechnical Documentation

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