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Software Development Company

Fathom 4

Service-disabled veteran-owned engineering and software firm supporting US Department of Defense programmes

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About Fathom 4

Fathom 4 is a US defence engineering company that serves Department of Defense clients. Its stated mission is engineering freedom for the country, its clients and its employees, and it operates as a service-disabled veteran-owned small business.

What Fathom 4 offers

C4ISR systems and platforms — engineering support for command, control, communications, intelligence and surveillance systems.
Finite element analysis — structural and mechanical simulation.
High performance computing systems analysis — analysis of large computing systems.
Cybersecurity, software, hardware and logistics — listed among its engineering areas.

Who it works with

Defense programmes within the Department of Defense. The company says its employees are embedded members of those programmes, and that it treats staff well so they do the same for clients.

Key facts

Status: service-disabled veteran-owned small business (SDVOSB)
Client: US Department of Defense

Profile written by TrustList from the business's own published information, Oct 2026.

Categories & features

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