Top 100 Contractors in NAICS 561: Administrative and Support Services, FY2021

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Honeywell International Inc. 10 awardees, including National Technology & Engineering Solutions of Sandia, LLC, Honeywell Federal Manufacturing & Technologies, LLC and Vindicator Technologies, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army) VA (Department of Veterans Affairs)	$5,996,551,355	11.5%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 3 since FY2020.
2	Triad National Security, LLC Top agencies DOE (Department of Energy)	$3,955,926,494	7.6%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; down 1 since FY2020.
3	Kbr, Inc. 4 awardees, including KBR Services, LLC and KBR Wyle Services, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,913,527,395	5.6%	Rank history: #3 in FY2022, #75 in FY2023, #89 in FY2024 and not on the FY2025 list; up 6 since FY2020.
4	Consolidated Nuclear Security, LLC Top agencies DOE (Department of Energy)	$2,607,717,690	5.0%	Rank history: #4 in FY2022, #3 in FY2023, #3 in FY2024 and #4 in FY2025; down 1 since FY2020.
5	Ut-Battelle LLC Top agencies DOE (Department of Energy)	$2,266,992,542	4.3%	Rank history: #5 in FY2022, #5 in FY2023, #4 in FY2024 and #3 in FY2025; unchanged since FY2020.
6	Vectrus Systems Corporation 7 awardees, including V2X Systems LLC, Vectrus Federal Services GMBH and Vectrus Services A / S Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,744,882,241	3.3%	Rank history: #7 in FY2022, #4 in FY2023, #20 in FY2024 and not on the FY2025 list; up 2 since FY2020.
7	Savannah River Nuclear Solutions LLC Top agencies DOE (Department of Energy)	$1,663,520,279	3.2%	Rank history: #6 in FY2022, #6 in FY2023, #42 in FY2024 and not on the FY2025 list; down 1 since FY2020.
8	Maximus Inc. Through Maximus Federal Services, Inc. Top agencies HHS (Department of Health and Human Services) Treasury (Department of the Treasury) VA (Department of Veterans Affairs)	$1,035,534,261	2.0%	Rank history: #13 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
9	Amentum Services, Inc. 4 awardees, including Dyncorp International LLC and URS Federal Services International, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOS (Department of State)	$892,780,867	1.7%	Rank history: #8 in FY2022, #11 in FY2023, #8 in FY2024 and not on the FY2025 list; up 79 since FY2020.
10	Mission Support & Test Services LLC Top agencies DOE (Department of Energy)	$854,697,036	1.6%	Rank history: #9 in FY2022, #10 in FY2023, #9 in FY2024 and #11 in FY2025; up 3 since FY2020.
11	Lockheed Martin Corporation 7 awardees, including Sikorsky Aircraft Corporation and Lockheed Martin Procerus Technologies, L.C. Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force) Army (Department of the Army)	$825,829,964	1.6%	Rank history: #11 in FY2022, #14 in FY2023, #12 in FY2024 and #13 in FY2025; down 4 since FY2020.
12	Triple Canopy Inc. 6 awardees, including Centerra Group, LLC, Centerra Integrated Facilities Services, LLC and Omniplex World Services Corporation Top agencies DHS (Department of Homeland Security) DOS (Department of State) AOUSC (Administrative Office of the U.S. Courts)	$752,258,747	1.4%	Rank history: #10 in FY2022, #18 in FY2023, #32 in FY2024 and #22 in FY2025; unchanged since FY2020.
13	Securitas AB 5 awardees, including Paragon Systems Inc., Securitas Critical Infrastructure Services, Inc. and Securitas Electronic Security, Inc. Top agencies DHS (Department of Homeland Security) AOUSC (Administrative Office of the U.S. Courts) DCSA (Defense Counterintelligence and Security Agency)	$719,228,850	1.4%	Rank history: #14 in FY2022, #16 in FY2023, #26 in FY2024 and not on the FY2025 list; up 3 since FY2020.
14	The GEO Group, Inc. 4 awardees, including B.i. Incorporated, GEO Secure Services, LLC and Cornell Companies, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$714,108,060	1.4%	Rank history: #12 in FY2022, #12 in FY2023, #11 in FY2024 and #12 in FY2025; unchanged since FY2020.
15	Fluor Corporation 7 awardees, including Fluor Intercontinental, Inc., Fluor Federal Petroleum Operations, LLC and Fluor Amec II, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOE (Department of Energy)	$527,636,639	1.0%	Rank history: #15 in FY2022, #21 in FY2023, #5 in FY2024 and #5 in FY2025; down 4 since FY2020.
16	BAE Systems PLC 3 awardees, including BAE Systems Ordnance Systems Inc. and BAE Systems Technology Solutions & Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$453,841,382	0.9%	Rank history: #39 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
17	PAE Government Services Inc. 8 awardees, including FCI Federal, LLC, Metis Solutions, LLC and PAE Professional Services, LLC Top agencies DOS (Department of State) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$349,601,994	0.7%	Rank history: #18 in FY2022, #17 in FY2023 and not on the FY2024–FY2025 lists; up 25 since FY2020.
18	Cherokee Nation 5 awardees, including Cherokee Nation Management & Consulting, L.l.c.., Cherokee Federal Solutions, L.L.C. and Cherokee Nation Strategic Programs, L.L.C. Top agencies DOS (Department of State) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$345,720,586	0.7%	Rank history: not on the FY2022–FY2025 lists; up 168 since FY2020.
19	AECOM 3 awardees, including Nuclear Waste Partnership LLC and AECOM Technical Services, Inc. Top agencies DOE (Department of Energy) Navy (Department of the Navy) DOT (Department of Transportation)	$337,794,233	0.6%	Rank history: #16 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
20	Leidos Holdings, Inc. 8 awardees, including Leidos, Inc., Mission Support Alliance, LLC and Leidos Biomedical Research Inc. Top agencies NSF (National Science Foundation) DOE (Department of Energy) Army (Department of the Army)	$320,253,375	0.6%	Rank history: #21 in FY2022, #22 in FY2023, #21 in FY2024 and #21 in FY2025; down 3 since FY2020.
21	Nana Regional Corporation Inc 14 awardees, including Akima Support Operations, LLC, Akima Global Services, LLC and Rivertech LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Army (Department of the Army)	$278,427,369	0.5%	Rank history: #29 in FY2022, #31 in FY2023, #44 in FY2024 and #26 in FY2025; up 5 since FY2020.
22	CACI International Inc. 7 awardees, including Caci Premier Technology, LLC, Caci Nss, LLC and Caci, Inc. - Federal Top agencies DCSA (Defense Counterintelligence and Security Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$273,353,078	0.5%	Rank history: #38 in FY2022, #30 in FY2023, #31 in FY2024 and #24 in FY2025; up 12 since FY2020.
23	Jacobs Engineering Group Inc. 4 awardees, including Amentum Technology, Inc. and Ch2M Facility Support Services, LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) DHS (Department of Homeland Security)	$265,151,065	0.5%	Rank history: #24 in FY2022, #27 in FY2023, #96 in FY2024 and not on the FY2025 list; up 10 since FY2020.
24	Cotton Commercial Usa, Inc. Top agencies DHS (Department of Homeland Security)	$259,324,897	0.5%	Rank history: not on the FY2022–FY2023 lists, #61 in FY2024 and #53 in FY2025; new, not ranked in FY2020.
25	Fedex Corp 4 awardees, including Fedex Supply Chain Distribution System, Inc. and Federal Express Corporation Top agencies VA (Department of Veterans Affairs) DOS (Department of State) USAF (Department of the Air Force)	$253,849,246	0.5%	Rank history: #22 in FY2022, #24 in FY2023, #24 in FY2024 and #19 in FY2025; up 19 since FY2020.
26	The Day & Zimmermann Group, Inc. 2 awardees, including SOC LLC and SOC Nevada LLC Top agencies DOS (Department of State) Army (Department of the Army) DOE (Department of Energy)	$250,869,294	0.5%	Rank history: #27 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
27	Afognak Native Corporation 18 awardees, including Alutiiq Commercial Enterprises LLC, Alutiiq Information Management, LLC and Alutiiq Advanced Security Solutions LLC Top agencies USAF (Department of the Air Force) DOS (Department of State) Navy (Department of the Navy)	$242,850,885	0.5%	Rank history: #34 in FY2022, #56 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
28	Arctic Slope Regional Corporation 4 awardees, including Asrc Communications, Ltd., Asrc Federal Field Services, LLC and Arctic Slope Technical Services, Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) Army (Department of the Army)	$237,547,861	0.5%	Rank history: #28 in FY2022, #25 in FY2023, #25 in FY2024 and #18 in FY2025; up 21 since FY2020.
29	General Dynamics Corporation 7 awardees, including General Dynamics Information Technology Inc., General Dynamics Mission Systems, Inc. and General Dynamics Land Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$228,160,421	0.4%	Rank history: #17 in FY2022, #9 in FY2023, #16 in FY2024 and #20 in FY2025; down 10 since FY2020.
30	Loyal Source Government Services LLC 2 awardees Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$226,789,193	0.4%	Rank history: #45 in FY2022, #26 in FY2023, #29 in FY2024 and #42 in FY2025; up 10 since FY2020.
31	Corecivic, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$226,583,513	0.4%	Rank history: #26 in FY2022, #38 in FY2023, #40 in FY2024 and #23 in FY2025; down 8 since FY2020.
32	Pride Industries Top agencies Army (Department of the Army) USAF (Department of the Air Force) DECA (Defense Commissary Agency)	$210,596,978	0.4%	Rank history: #31 in FY2022, #33 in FY2023, #37 in FY2024 and #46 in FY2025; up 5 since FY2020.
33	Metropolitan Security Services, Inc. Top agencies AOUSC (Administrative Office of the U.S. Courts) DOJ (Department of Justice)	$194,294,040	0.4%	Rank history: #25 in FY2022, #29 in FY2023, #17 in FY2024 and #17 in FY2025; up 3 since FY2020.
34	Michael Baker International, LLC Through Sallyport Global Holdings Inc. Top agencies USAF (Department of the Air Force)	$184,496,828	0.4%	Rank history: #19 in FY2022, #23 in FY2023, #30 in FY2024 and not on the FY2025 list; down 14 since FY2020.
35	Syncom Space Services LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) HUD (Department of Housing and Urban Development)	$182,459,854	0.3%	Rank history: #36 in FY2022, #45 in FY2023, #84 in FY2024 and not on the FY2025 list; down 3 since FY2020.
36	J & J Maintenance Inc. 2 awardees, including J&J Germany GMBH Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DECA (Defense Commissary Agency)	$181,994,503	0.3%	Rank history: #30 in FY2022, #37 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
37	Perspecta Inc. Through Peraton Risk Decision Inc. Top agencies DCSA (Defense Counterintelligence and Security Agency) DHS (Department of Homeland Security)	$181,279,740	0.3%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
38	Inter-Con Security Systems, Inc. Top agencies DOS (Department of State) DOJ (Department of Justice) DOI (Department of the Interior)	$176,158,590	0.3%	Rank history: #35 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
39	G4S Holding One Inc. 9 awardees, including G4S Secure Integration LLC, G4S Secure Solutions (USA) Inc. and G4S Secure Solutions International Inc. Top agencies DOS (Department of State) DHS (Department of Homeland Security) DOI (Department of the Interior)	$175,445,360	0.3%	Rank history: #37 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
40	Skookum Educational Programs Top agencies Navy (Department of the Navy) Army (Department of the Army) DHS (Department of Homeland Security)	$173,895,401	0.3%	Rank history: #33 in FY2022, #36 in FY2023, #38 in FY2024 and #29 in FY2025; down 1 since FY2020.
41	IAP Global Services LLC 4 awardees, including Iap-Ecc LLC, IAP World Services, Inc. and Readiness Management Support LC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$151,256,758	0.3%	Rank history: not on the FY2022 list, #66 in FY2023 and not on the FY2024–FY2025 lists; up 27 since FY2020.
42	Chugach Alaska Corporation 6 awardees, including Wolf Creek Federal Services LLC, Defense Base Services, LLC and Chugach Consolidated Solutions, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$148,168,565	0.3%	Rank history: #41 in FY2022, #41 in FY2023, #69 in FY2024 and not on the FY2025 list; down 11 since FY2020.
43	Remington Arms Company LLC 3 awardees, including Dyncorp International LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$144,308,130	0.3%	Rank history: not on the FY2022–FY2025 lists; down 33 since FY2020.
44	The Chenega Corporation 13 awardees, including Chenega Facilities Management LLC, Chenega Global Protection, LLC and Chenega Integrated Security Solutions, LLC Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$144,026,781	0.3%	Rank history: #32 in FY2022, #28 in FY2023, #87 in FY2024 and not on the FY2025 list; up 27 since FY2020.
45	Fleetcor Technologies Inc. Through Corporate Lodging Consultants, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) CNCS (Corporation for National and Community Service)	$141,038,080	0.3%	Rank history: #64 in FY2022, #96 in FY2023 and not on the FY2024–FY2025 lists; up 50 since FY2020.
46	Mvm, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$134,535,089	0.3%	Rank history: #23 in FY2022, #32 in FY2023, #36 in FY2024 and #37 in FY2025; up 10 since FY2020.
47	Professional Contract Services, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DHA (Defense Health Agency)	$130,505,279	0.2%	Rank history: #44 in FY2022, #43 in FY2023, #43 in FY2024 and #32 in FY2025; up 5 since FY2020.
48	Pond Security Service GMBH Top agencies Army (Department of the Army) DOS (Department of State) DODEA (Department of Defense Education Activity)	$126,227,833	0.2%	Rank history: #46 in FY2022, #51 in FY2023, #55 in FY2024 and #45 in FY2025; down 3 since FY2020.
49	Aegis Defense Services, 7 awardees, including Gardaworld Federal Services LLC, Garda CL Northwest, Inc. and Garda CL Southeast, Inc. Top agencies DOS (Department of State) Army (Department of the Army) USAF (Department of the Air Force)	$123,421,090	0.2%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
50	Covenant Aviation Security LLC Top agencies DHS (Department of Homeland Security)	$114,368,249	0.2%	Rank history: #49 in FY2022, #48 in FY2023, #45 in FY2024 and #40 in FY2025; up 3 since FY2020.
51	B.i. Incorporated Top agencies DHS (Department of Homeland Security)	$114,083,727	0.2%	Rank history: not on the FY2022–FY2025 lists; up 78 since FY2020.
52	Management & Training Corporation Top agencies DOJ (Department of Justice) DHS (Department of Homeland Security)	$112,794,935	0.2%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
53	Tlingit Haida Tribal Business Corporation 6 awardees, including T&H Services, LLC, Kira Training Services LLC and Kira Aviation Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$110,344,150	0.2%	Rank history: #42 in FY2022, #47 in FY2023, #68 in FY2024 and not on the FY2025 list; up 9 since FY2020.
54	Aptim Federal Services LLC 2 awardees, including High Desert Support Services, LLC Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security) Army (Department of the Army)	$107,080,276	0.2%	Rank history: #56 in FY2022, #91 in FY2023 and not on the FY2024–FY2025 lists; up 82 since FY2020.
55	Johnson Controls Security Solutions LLC 30 awardees, including Johnson Controls Government Systems, LLC, Johnson Controls, Inc. and Johnson Controls Building Automation Systems, LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$106,865,874	0.2%	Rank history: #52 in FY2022, #79 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
56	EMCOR Group, Inc. 2 awardees, including Emcor Government Services, Inc. and Mesa Energy Systems, Inc. Top agencies GAO (Government Accountability Office) GSA (General Services Administration) Army (Department of the Army)	$102,310,037	0.2%	Rank history: not on the FY2022–FY2025 lists; up 36 since FY2020.
57	Dzsp 21 LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$99,477,912	0.2%	Rank history: #51 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
58	Brillient Corporation Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture)	$97,800,641	0.2%	Rank history: not on the FY2022 list, #74 in FY2023, #85 in FY2024 and #77 in FY2025; up 52 since FY2020.
59	Loyalty Support Services Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$88,507,192	0.2%	Rank history: #55 in FY2022, #58 in FY2023, #57 in FY2024 and #28 in FY2025; up 8 since FY2020.
60	M.c. Dean, Inc. Top agencies AOUSC (Administrative Office of the U.S. Courts) WHS (DOD Washington Headquarters Service) DOD (Department of Defense)	$87,613,633	0.2%	Rank history: #50 in FY2022, #55 in FY2023, #53 in FY2024 and #41 in FY2025; up 39 since FY2020.
61	Computer Sciences Corporation Through PAE Applied Technologies LLC Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$86,070,279	0.2%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
62	Amentum Spaceport LLC Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$84,735,790	0.2%	Rank history: not on the FY2022–FY2025 lists; up 10 since FY2020.
63	Melwood Horticultural Training Center, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$82,061,123	0.2%	Rank history: #57 in FY2022, #72 in FY2023, #64 in FY2024 and #59 in FY2025; up 16 since FY2020.
64	KBR Diego Garcia, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$77,829,946	0.1%	Rank history: #100 in FY2022, #90 in FY2023, #92 in FY2024 and not on the FY2025 list; up 43 since FY2020.
65	King & George, LLC 2 awardees, including Invicta Global, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) GSA (General Services Administration)	$76,172,661	0.1%	Rank history: #54 in FY2022, #62 in FY2023, not on the FY2024 list and #98 in FY2025; up 84 since FY2020.
66	Diversified Protection Corp Top agencies DHS (Department of Homeland Security) WHS (DOD Washington Headquarters Service) DOL (Department of Labor)	$73,222,619	0.1%	Rank history: #62 in FY2022, #78 in FY2023 and not on the FY2024–FY2025 lists; up 27 since FY2020.
67	Asrc Federal Professional Services, LLC Top agencies DCSA (Defense Counterintelligence and Security Agency)	$71,813,085	0.1%	Rank history: not on the FY2022–FY2025 lists; up 130 since FY2020.
68	Golden Svcs, LLC Top agencies DHS (Department of Homeland Security) DOE (Department of Energy) NASA (National Aeronautics and Space Administration)	$70,185,956	0.1%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
69	Peckham Vocational Industries, Inc. Top agencies DOS (Department of State) DLA (Defense Logistics Agency) HHS (Department of Health and Human Services)	$68,518,029	0.1%	Rank history: #69 in FY2022, #54 in FY2023, #35 in FY2024 and #27 in FY2025; up 20 since FY2020.
70	Technica LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$66,947,247	0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
71	Didlake Inc. Top agencies Navy (Department of the Navy) WHS (DOD Washington Headquarters Service) DOE (Department of Energy)	$66,420,217	0.1%	Rank history: #59 in FY2022, #77 in FY2023, #76 in FY2024 and #75 in FY2025; up 13 since FY2020.
72	Facility Services Management, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) NARA (National Archives and Records Administration)	$66,175,829	0.1%	Rank history: #77 in FY2022, #60 in FY2023, #67 in FY2024 and not on the FY2025 list; up 15 since FY2020.
73	AB Staffing Solutions LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Treasury (Department of the Treasury)	$64,712,450	0.1%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 38 since FY2020.
74	Vendtech-Sgi LLC Top agencies DHS (Department of Homeland Security)	$64,287,060	0.1%	Rank history: #78 in FY2022, #73 in FY2023, #75 in FY2024 and #66 in FY2025; up 23 since FY2020.
75	The Tatitlek Corporation 2 awardees, including Tatitlek Technologies, LLC and Tatitlek Federal Services LLC Top agencies DOS (Department of State) Army (Department of the Army) DOJ (Department of Justice)	$63,036,850	0.1%	Rank history: not on the FY2022–FY2025 lists; up 57 since FY2020.
76	Chimes District of Columbia Inc. Top agencies Army (Department of the Army) WHS (DOD Washington Headquarters Service) USAF (Department of the Air Force)	$62,448,878	0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
77	Identity Theft Guard Solutions, Inc. Top agencies OPM (Office of Personnel Management) DHS (Department of Homeland Security) DOI (Department of the Interior)	$62,414,673	0.1%	Rank history: #53 in FY2022, not on the FY2023 list, #62 in FY2024 and not on the FY2025 list; down 12 since FY2020.
78	Coast Professional, Inc. Top agencies ED (Department of Education)	$61,254,074	0.1%	Rank history: not on the FY2022–FY2025 lists; down 32 since FY2020.
79	Nuclear Waste Partnership LLC Top agencies DOE (Department of Energy)	$60,619,531	0.1%	Rank history: not on the FY2022–FY2025 lists; down 51 since FY2020.
80	Tiya Services, L.L.C. Top agencies Army (Department of the Army)	$60,091,915	0.1%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; up 29 since FY2020.
81	Teamstaff Inc. Through DLH Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$59,580,760	0.1%	Rank history: #65 in FY2022, #46 in FY2023, #46 in FY2024 and #55 in FY2025; up 38 since FY2020.
82	VS2 LLC Top agencies Army (Department of the Army)	$58,205,033	0.1%	Rank history: not on the FY2022–FY2025 lists; up 58 since FY2020.
83	Sciolex Corporation Top agencies DHS (Department of Homeland Security)	$58,087,971	0.1%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 34 since FY2020.
84	Global Precision Systems, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$58,026,727	0.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; up 22 since FY2020.
85	EOD Technology Inc. Through Acuity - Janus Global, LLC Top agencies DOS (Department of State)	$55,894,927	0.1%	Rank history: #73 in FY2022, #94 in FY2023 and not on the FY2024–FY2025 lists; up 58 since FY2020.
86	Winnebago Tribe of Nebraska 2 awardees, including HCI Management Services Company and Protege Health Services LLC Top agencies DOS (Department of State) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$54,786,734	0.1%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
87	Atkins Nuclear Secured Holdings Corporation Through Isotek Systems, LLC Top agencies DOE (Department of Energy)	$54,633,150	0.1%	Rank history: #96 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; up 80 since FY2020.
88	Nova Global Supply and Services LLC 4 awardees, including Valiant Government Services LLC, Valiant / Alca JV LLC and Valiant Global Defense Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$53,761,470	0.1%	Rank history: not on the FY2022–FY2025 lists; up 50 since FY2020.
89	Servicesource Inc. Top agencies WHS (DOD Washington Headquarters Service) Treasury (Department of the Treasury) HHS (Department of Health and Human Services)	$52,640,474	0.1%	Rank history: #61 in FY2022, #71 in FY2023, #70 in FY2024 and #61 in FY2025; up 19 since FY2020.
90	Arctec Alaska JV Top agencies USAF (Department of the Air Force)	$52,116,904	0.1%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; up 93 since FY2020.
91	Ghost RX Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOI (Department of the Interior)	$52,062,552	0.1%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; up 206 since FY2020.
92	Koniag, Inc. 7 awardees, including Pacarctic, LLC, Arlluk Technology Solutions LLC and Koniag Brillient, LLC Top agencies DOS (Department of State) DHS (Department of Homeland Security) DOJ (Department of Justice)	$51,755,548	0.1%	Rank history: not on the FY2022 list, #80 in FY2023 and not on the FY2024–FY2025 lists; up 87 since FY2020.
93	Central Research Inc. Top agencies ED (Department of Education)	$51,620,013	0.1%	Rank history: not on the FY2022–FY2025 lists; down 29 since FY2020.
94	Action Financial Services, LLC Top agencies ED (Department of Education)	$51,215,405	0.1%	Rank history: not on the FY2022–FY2025 lists; down 19 since FY2020.
95	Serco North America (Holdings) Inc 2 awardees, including Serco Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$51,152,572	0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
96	Tanaq Support Services, LLC Top agencies HHS (Department of Health and Human Services)	$50,966,007	0.1%	Rank history: not on the FY2022–FY2025 lists; up 305 since FY2020.
97	F.h. Cann & Associates, Inc. Top agencies ED (Department of Education)	$49,979,924	0.1%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
98	Millbrook Support Services Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$48,408,943	0.1%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; up 276 since FY2020.
99	Trax International Corporation Top agencies NASA (National Aeronautics and Space Administration)	$48,378,521	0.1%	Rank history: #81 in FY2022 and not on the FY2023–FY2025 lists; down 29 since FY2020.
100	Rapid Temps, LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$48,372,613	0.1%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 263 since FY2020.

Rankings for the codes under NAICS 561

How this ranking works

• Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
• Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $52.2 billion obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

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