These companies in the United States operate within the Armed Forces sector, encompassing various branches of the military and related support organizations. They are predominantly large government entities responsible for national defense and security. Among them are the US Army, providing land dominance; the US Navy, protecting America at sea; the United States Marine Corps, offering rapid deployment capabilities; and the United States Department of War, which supplies military forces.
The data shows a strong concentration of headquarters in the Washington D.C. area, including Washington and Arlington, indicating a central hub for military command and strategic operations. The founding dates of these organizations span several centuries, with the Army National Guard established in 1636 and the US Army in 1775, alongside more recent entities like the United States Department of War, founded in 1949.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
US Armyusarmybasic.com
Providing prompt, sustained land dominance across full military operations spectrum, supporting combatant commanders in national defense and warfare. |
367,627 | |||
| 2 | 150,748 | ||||
| 3 |
United States Marine Corpsmarines.mil
Provides rapid deployment of combined-arms task forces using naval mobility for power projection on land, sea, and air. |
78,275 | |||
| 4 |
United States Department of Warwar.gov
A government department providing military forces to defend the country, deter adversaries, and work with allies for national security |
68,533 | |||
| 5 |
Army National Guardnationalguard.com
This organization is a component of the Army, providing National Guard Soldiers who serve in various missions both domestically and overseas |
59,575 | |||
| 6 |
Marine Corps Recruitingrmi.marines.com
This organization focuses on recruiting individuals to become Marines, emphasizing leadership, values, and physical fitness, aiming to develop quality citizens |
40,191 | |||
| 7 |
U.S. Coast Guarduscg.mil
Protect public safety, environment, and economic interests along coasts, ports, waterways, and international waters supporting national security. |
32,193 | |||
| 8 |
US Army Corps of Engineersusace.army.mil
Provides public engineering services to enhance national security, boost the economy, and mitigate disaster risks through innovative and sustainable solutions |
26,566 | |||
| 9 |
United States Army Reserveusar.army.mil
The US Army Reserve provides trained Soldiers and units with critical combat support capabilities to support national strategy during peacetime, contingencies, and war |
25,976 | |||
| 10 |
U.S. Air Force Reserveairforce.com
Supports US air defense and military missions, leveraging reservists' civilian skills and expertise for critical operations and training globally, alongside active-duty members. |
19,030 | |||
| 11 |
Royal Navyroyalnavy.mod.uk
A multi-faceted military organization with capabilities at sea, on land, and in the air, including ships, submarines, aircraft, and support vessels |
17,268 | |||
| 12 |
Air National Guardairforce.com
Provides part-time military service with high-tech career training, college tuition assistance, and federal benefits while serving in local units near home. |
12,937 | |||
| 13 |
U.S. Navy Reservenavyreserve.navy.mil
Delivers real-world capabilities and expertise to support the Navy mission, building a lethal, warfighting culture focused on great power competition. |
12,928 | |||
| 14 |
Defense Logistics Agencydla.mil
Management of global defense supply chain including procurement, warehousing, transportation, and disposal of military materials and services. |
10,533 | |||
| 15 |
U.S. Army Network Enterprise Technology Commandnetcom.army.mil
Leads global operations for the Army's portion of the DODIN, ensuring freedom of action in cyberspace while denying the same to adversaries. |
6,482 | |||
| 16 |
United States Department of the Air Forceaf.mil
A military department of the US Department of Defense that oversees the organization of the United States Air Force and United States Space Force |
5,392 | |||
| 17 | 
Us Army Reservesusarmy.mil
A military organization operating in St Joseph, MN, United States as part of the Army Reserves, providing defense and support services |
4,119 | |||
| 18 |
U.S. Army TACOMtacom.army.mil
A major command of the Army Materiel Command managing the US Army's ground systems and industrial base, focusing on readiness globally |
3,675 | |||
| 19 |
Defense Intelligence Agencydia.mil
Provides all-source defense intelligence to support warfighters, defense planners, and policymakers in protecting national security interests worldwide. |
3,416 | |||
| 20 |
Air Force Research Laboratoryafresearchlab.com
Leading discovery, development, delivery of warfighting technologies for air, space, cyberspace forces, providing unmatched advantage through research, technology, and strategic partnerships. |
3,085 | |||
| 21 |
Naval Undersea Warfare Center Newportnavsea.navy.mil
Providing research, development, test, and evaluation of undersea technology for submarines, autonomous systems, and weapon systems to achieve undersea superiority |
2,818 | |||
| 22 |
U.S. Army Contracting Commandarmy.mil
This company supports US Army warfighters by acquiring essential equipment, supplies, and services worldwide, ensuring their success in missions and daily life |
2,709 | |||
| 23 |
Air National Guard Recruitingairforce.com
This company is part of the Air National Guard, which upholds national security, serves communities, and has locations in all states and territories |
2,585 | |||
| 24 |
US Army Reservesgoarmy.com
The organization is the reserve force of the United States Army, along with the Army National Guard, forming the Army's reserve component |
2,559 | |||
| 25 |
Army ROTC (Official Page)armyrotc.army.mil
The company provides leadership and management training for college students through Army ROTC, offering scholarships and commissioning new lieutenants for the Army |
2,196 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
National Guard Bureaunationalguard.mil
The National Guard Bureau oversees the Army National Guard and Air Guard, providing national-level guidance and support to all states and territories |
2,131 | |||
| 27 | 1,938 | ||||
| 28 |
The Joint Staffjcs.mil
The company assists the Chairman of the Joint Chiefs of Staff in providing strategic direction and integration of land, naval, and air forces |
1,688 | |||
| 29 |
Georgia Army National Guardnationalguard.com
A component of The Army, the Georgia Army National Guard offers career opportunities, educational benefits, and service in both community and country |
1,687 | |||
| 30 |
Marine Corps Systems Commandmarcorsyscom.marines.mil
Marine Corps Systems Command equips and sustains Marine forces with ground weapon and IT systems for expeditionary and crisis-response capabilities |
1,659 | |||
| 31 |
Army Healthcaregoarmy.com
Recruiting and training skilled healthcare professionals for the US Army through strategic marketing, relentless recruiting, and cutting-edge training worldwide |
1,598 | |||
| 32 |
United States Military Academywestpoint.edu
A prestigious leader development institution that molds cadets intellectually, physically, and ethically to become 2nd Lieutenants in the US Army |
1,547 | |||
| 33 |
Wisconsin Army National Guardng.wi.gov
The Wisconsin Army National Guard consists of approximately 7,700 soldiers spread throughout 67 communities in Wisconsin, with both federal and state missions |
1,341 | |||
| 34 |
Naval Air Warfare Center Weapons Division (NAWCWD)navair.navy.mil
A division of Naval Air Systems Command specializing in weapons development for the Department of the Navy in Southern California |
1,309 | |||
| 35 |
Marine Forces Reservemarforres.marines.mil
This company serves as the headquarters command for the US Marine Corps Reserve, responsible for training and mobilizing Reserve Marines in times of need |
1,256 | |||
| 36 |
Iowa Army National Guardiowanationalguard.com
This military organization in Iowa consists of around 7,000 Soldiers and 2,000 Airmen, serving both the state and the country |
1,225 | |||
| 37 |
Naval Surface Warfare Center Dahlgren Divisionnavsea.navy.mil
A leading naval warfare institution specializing in warfare systems development and integration for the military, located in Dahlgren, VA |
1,218 | |||
| 38 |
U.S. Army and Army National Guardarmy.mil
Company specializing in providing LinkedIn position descriptions tailored for members and veterans of the US Army and Army National Guard |
1,168 | |||
| 39 |
Michigan Army National Guardnationalguard.com
Recruits and retains individuals for service in the Michigan Army National Guard |
1,162 | |||
| 40 |
U.S. Army DEVCOM Army Research Laboratoryarl.devcom.army.mil
Official page Content shared does not imply endorsement Stay updated on company news and announcements here |
1,134 | |||
| 41 |
Defense Health Agencycivilianmedicaljobs.com
Health care professionals, both civilian and military, serve military service members at locations worldwide with unique professional opportunities and benefits |
1,110 | |||
| 42 |
Ohio National Guard - The Adjutant General's Department of Ohiolinktr.ee
Established in 1788 as a militia, this organization in Ohio has over 16,000 personnel responding to federal, state, and community missions |
1,109 | |||
| 43 |
Missouri National Guardmissouriform.com
This organization serves a dual mission, providing support for both the president of the United States and the governor of Missouri They respond to domestic emergencies and are prepared for national security missions |
1,094 | |||
| 44 |
82nd Airborne Division, U.S. Armybragg.army.mil
Elite US Army airborne division specializing in parachute assault operations, known for being highly trained and strategically mobile light infantry |
1,074 | |||
| 45 |
North Carolina National Guardng.nc.gov
A team of nearly 12,000 citizen-Soldiers and -Airmen in North Carolina providing security capabilities around the world and in all 100 counties |
1,057 | |||
| 46 |
Tobyhanna Army Depottobyhanna.army.mil
Leader in logistics support for military C5ISR systems, offering sustainment, overhaul, manufacturing, engineering, integration, and field support for the Department of Defense |
1,046 | |||
| 47 |
US Army TRADOCarmy.mil
Recruits, trains, educates Soldiers, develops leaders, establishes standards, and evolves organizational designs and concepts to build a prepared and successful US Army |
1,018 | |||
| 48 |
United States Air Force Security Forcesafsfc.af.mil
Provide force protection, base law enforcement, secure classified information, conduct patrols, manage security programs, and support combat readiness worldwide. |
1,016 | |||
| 49 |
South Carolina Army National Guardnationalguard.com
Explore opportunities to serve the South Carolina Army National Guard part-time and receive education assistance, paid job training, and benefits Connect now! |
1,015 | |||
| 50 |
Project Transition USAprojecttransitionusa.com
Dedicated to assisting transitioning military and veterans in finding civilian careers through advanced LinkedIn training, personal introductions, and mentorship support |
1,003 | |||
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How this list is built
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 Nov 14, 2026.
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