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Fathom 4, LLC Tech Stack

DoD C4ISR engineering and program management for command centers and tactical systems

Defense and Space Manufacturing Charleston, SOUTH CAROLINA 51–200 employees Founded 2012 Privately Held

Fathom 4 is a Service Disabled Veteran-owned small business providing engineering and integration services to DoD clients across command-and-control, communications, and intelligence programs. The stack—SysML, UML, MBSE, SolidWorks, and Windows/Linux virtualization—reflects a systems-engineering discipline common in defense contracting. Current hiring is engineering-heavy (6 roles) with accelerating velocity, suggesting active program scaling; the active portfolio spans EW/SIGINT software, USMC events support, and financial analysis work.

Tech Stack 17 technologies

Core StackLinux VMware Hyper-V Jira Trello Asana SolidWorks SysML UML MBSE Windows Microsoft Office PowerShell bash Excel Microsoft Project

What Fathom 4, LLC Is Building

◆Challenges

Prevent architecture sprawl

▲Active Projects

Electronics warfare (ew)/signals intelligence (sigint) software system
30-day security updates
Usmc setr events
Financial analysis for dod projects

Hiring Activity

Accelerating9 roles · 5 in 30d

Department

Engineering

6

Ops

1

Seniority

Junior

2

Mid

2

Senior

2

Manager

1

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About Fathom 4, LLC

Fathom 4 provides engineering services, program management, and systems integration to U.S. Department of Defense clients. Founded in 2012 and based in Charleston, South Carolina, the company specializes in C4ISR (command, control, communications, computing, intelligence, surveillance, reconnaissance) work for shore and mobile command centers, tactical vehicle systems, and related IT services. As a Service Disabled Veteran-owned Small Business (SDVOSB), Fathom 4 operates in the 51–200 employee range and maintains an employee-first operational philosophy. The company's technical focus centers on requirements modeling, systems design, QA testing, and integration across DoD platforms.

HeadquartersCharleston, SOUTH CAROLINA

Company Size51–200 employees

Founded2012

Hiring MarketsUnited States

Frequently Asked Questions

What is Fathom 4's tech stack?

SysML, UML, MBSE, SolidWorks, Windows, Linux, VMware, Hyper-V, Jira, Microsoft Project, PowerShell, and bash. This toolkit emphasizes model-based systems engineering and virtualization for defense applications.

What does Fathom 4 do for the DoD?

Fathom 4 provides C4ISR program management, command-center prototyping, tactical vehicle systems engineering, QA testing, and IT services. Current projects include EW/SIGINT software systems and USMC event support.