| # | Company | Employees |
|---|---|---|
| 1 |
United States Department of the Navynavy.mil
This organization is part of the Navy and is involved in activities related to naval operations, defense, and national security |
9,503 |
| 2 |
Johns Hopkins Applied Physics Laboratoryjhuapl.edu
University-affiliated research center providing technical expertise, prototyping, research, development, and analysis for national security and scientific challenges. |
7,850 |
| 3 |
Naval Air Systems Command (NAVAIR)navair.navy.mil
Delivers timely, effective, and sustainable naval aviation capabilities to ensure warfighter dominance and mission success while prioritizing safety and national defense objectives. |
7,687 |
| 4 |
National Security Agencynsa.gov
Provides foreign signals intelligence to policymakers and military forces while securing national security systems and weaponry through advanced cybersecurity and computer operations. |
4,637 |
| 5 |
NASA Goddard Space Flight Centernasa.gov
A major US laboratory developing and operating unmanned scientific spacecraft for NASA's Earth observation, astronomy, planetary science, and astrophysics missions |
4,049 |
| 6 |
Thales Defense & Security, Inc.thalesdsi.com
Global provider of innovative solutions for defense, federal, and commercial markets including communication systems, sonar systems, data protection, and technology integration for various domains |
2,013 |
| 7 |
AAI Corporationtextronsystems.com
This company develops and integrates products and services for aerospace, defense, law enforcement, security, and critical infrastructure protection worldwide |
1,655 |
| 8 |
NTS - National Technical Systemselementdefense.com
A company providing testing, inspections, certifications, and supply chain solutions with experienced engineers and technicians to ensure product compliance and quality |
1,078 |
| 9 |
Precise Systems, Inc.goprecise.com
A professional services company specializing in supporting US Department of Defense programs through digital transformation, advanced engineering, IT solutions, and technical support |
816 |
| 10 |
Boeing Intelligence & Analyticsbia-boeing.com
Provider of advanced analytics and intelligence solutions for the Intelligence Community, offering software engineering, systems integration, rapid prototyping, and project leadership services |
638 |
| 11 |
Forterraforterra.com
A pioneering provider of autonomous systems for ground-based movement, specializing in protecting soldiers and enabling civilian workers in critical conditions for the US Department of Defense |
603 |
| 12 |
Science Systems and Applications, Inc (SSAI)ssaihq.com
Leading provider of science, engineering, and technology solutions supporting pioneers in Earth and space science missions with innovative research and technical support |
593 |
| 13 |
Digital Receiver Technology, Inc.drti.com
DRT designs cutting-edge software defined radio systems for intelligence, defense, and homeland security, providing unmatched versatility and performance for mission-critical applications |
520 |
| 14 |
TCOM, L.P.tcomlp.com
Global leader in ISR solutions with Lighter-than-Air Persistent Surveillance platforms for Air, Maritime, and Land, providing complete persistent surveillance capabilities worldwide |
437 |
| 15 |
J.F. Taylor, Incjfti.com
A privately-held company specializing in electronic, computer, and mechanical engineering services for the government, providing full-service Department of Defense contracting with technical excellence and customer support |
345 |
| 16 |
Naval Surface Warfare Center Indian Head Divisionnavsea.navy.mil
A Department of Defense center specializing in energetics, explosive ordnance disposal technology, research, development, and support for military personnel worldwide |
344 |
| 17 |
AMEWASamewas.com
A veteran-run small business in Maryland supporting NAVAIR and DoD with program management, engineering, electronic warfare, testing, IT support, and career development for employees |
316 |
| 18 |
KeyW Corporationjacobs.com
Innovative national security solutions provider for the Intelligence, Cyber, and Counterterrorism communities, specializing in advanced technologies and cybersecurity solutions |
272 |
| 19 |
EverWatcheverwatchsolutions.com
An advanced government solutions provider offering defense, intelligence, and mission support services to ensure mission success through technology and expertise |
251 |
| 20 |
U.S. Army DEVCOM Chemical Biological Centercbc.devcom.army.mil
The company is a research and development center for chemical and biological defense technology, focused on equipping soldiers for future conflicts |
162 |
| 21 |
Solipsys
Industry leader in C2 Network-Centric solutions for DoD and Homeland Security, providing innovative technologies for information superiority, shared awareness, and time-critical decision making |
157 |
| 22 |
SA-TECHlinkedin.com
This company specializes in systems applications and technologies Visit their official LinkedIn page for more information |
150 |
| 23 |
GVTgvtllc.com
A small business specializing in aerospace mission solutions, experienced in NASA systems engineering, software engineering, mission operations, cybersecurity, and high-performance computing |
48 |
| 24 |
Advanced Thermal Batteries Inc. (ATB)asb-group.com
Leading supplier of advanced thermal batteries for defense applications, offering a wide range of electrochemical options such as Li based and metal disulfide technologies |
41 |
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 24, 2026.
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The same list elsewhere in United States
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