Top 100 Contractors in NAICS 561: Administrative and Support Services, FY2023

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) USAF (Department of the Air Force) Navy (Department of the Navy)	$6,522,241,095	10.9%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	Triad National Security LLC 2 awardees Top agencies DOE (Department of Energy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$4,578,543,111	7.7%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2024 and #2 in FY2025; unchanged since FY2022.
3	Consolidated Nuclear Security, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) Army (Department of the Army)	$3,329,130,207	5.6%	Rank history: #4 in FY2021, #4 in FY2022, #3 in FY2024 and #4 in FY2025; up 1 since FY2022.
4	Vectrus Systems Corporation 6 awardees, including V2X Systems LLC, Vectrus Federal Services GMBH and Vectrus Services A / S Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$2,740,933,037	4.6%	Rank history: #6 in FY2021, #7 in FY2022, #20 in FY2024 and not on the FY2025 list; up 3 since FY2022.
5	Ut-Battelle LLC Top agencies DOE (Department of Energy)	$2,712,833,486	4.5%	Rank history: #5 in FY2021, #5 in FY2022, #4 in FY2024 and #3 in FY2025; unchanged since FY2022.
6	Savannah River Nuclear Solutions LLC Top agencies DOE (Department of Energy)	$2,539,868,766	4.3%	Rank history: #7 in FY2021, #6 in FY2022, #42 in FY2024 and not on the FY2025 list; unchanged since FY2022.
7	KBR Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$2,079,872,264	3.5%	Rank history: not on the FY2021 list, #43 in FY2022, #18 in FY2024 and not on the FY2025 list; up 36 since FY2022.
8	RTX Corporation 5 awardees, including Raytheon Company, Carrier Corporation and Kidde Technologies, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$1,942,264,965	3.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
9	General Dynamics Corporation 5 awardees, including General Dynamics OTS (Wilkes Barre), LLC, General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) NASA (National Aeronautics and Space Administration)	$1,651,460,126	2.8%	Rank history: #29 in FY2021, #17 in FY2022, #16 in FY2024 and #20 in FY2025; up 8 since FY2022.
10	Mission Support & Test Services LLC Top agencies DOE (Department of Energy) DFAS (Defense Finance and Accounting Service) USAF (Department of the Air Force)	$837,756,290	1.4%	Rank history: #10 in FY2021, #9 in FY2022, #9 in FY2024 and #11 in FY2025; down 1 since FY2022.
11	Amentum Services, Inc. 6 awardees, including Dyncorp International LLC and URS Federal Services International, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$837,103,512	1.4%	Rank history: #9 in FY2021, #8 in FY2022, #8 in FY2024 and not on the FY2025 list; down 3 since FY2022.
12	The GEO Group, Inc. 4 awardees, including B.i. Incorporated and GEO Secure Services, LLC Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$804,366,211	1.3%	Rank history: #14 in FY2021, #12 in FY2022, #11 in FY2024 and #12 in FY2025; unchanged since FY2022.
13	Maximus Inc. Through Maximus Federal Services, Inc. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) OPM (Office of Personnel Management)	$798,254,334	1.3%	Rank history: #8 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
14	Lockheed Martin Corporation 5 awardees, including Sikorsky Aircraft Corporation Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force) Army (Department of the Army)	$774,845,682	1.3%	Rank history: #11 in FY2021, #11 in FY2022, #12 in FY2024 and #13 in FY2025; down 3 since FY2022.
15	Xator LLC Top agencies DOS (Department of State) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$772,778,566	1.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 137 since FY2022.
16	Securitas AB 6 awardees, including Paragon Systems Inc. and Securitas OY Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) AOUSC (Administrative Office of the U.S. Courts)	$664,448,160	1.1%	Rank history: #13 in FY2021, #14 in FY2022, #26 in FY2024 and not on the FY2025 list; down 2 since FY2022.
17	PAE Government Services Inc. 10 awardees, including Amentum Spaceport LLC, Pae-Perini LLC and PAE Applied Technologies LLC Top agencies DOS (Department of State) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$586,153,238	1.0%	Rank history: #17 in FY2021, #18 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
18	Triple Canopy Inc. 5 awardees, including Centerra Group, LLC, Centerra Integrated Facilities Services, LLC and Centerra Integrated Services GMBH Top agencies AOUSC (Administrative Office of the U.S. Courts) DOE (Department of Energy) DHS (Department of Homeland Security)	$524,939,632	0.9%	Rank history: #12 in FY2021, #10 in FY2022, #32 in FY2024 and #22 in FY2025; down 8 since FY2022.
19	BAE Systems PLC 3 awardees, including BAE Systems Ordnance Systems Inc. and BAE Systems Onearc Usa, Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$472,392,271	0.8%	Rank history: #16 in FY2021, #39 in FY2022 and not on the FY2024–FY2025 lists; up 20 since FY2022.
20	Omniplex World Services Corp 2 awardees, including Triple Canopy Inc. Top agencies DHS (Department of Homeland Security) DOS (Department of State) Army (Department of the Army)	$461,909,963	0.8%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2024 and not on the FY2025 list; new.
21	Fluor Corporation 5 awardees, including Fluor Intercontinental, Inc., Fluor Federal Petroleum Operations, LLC and Fluor Intercontinental Germany GMBH Top agencies Army (Department of the Army) DOE (Department of Energy) USAF (Department of the Air Force)	$310,016,555	0.5%	Rank history: #15 in FY2021, #15 in FY2022, #5 in FY2024 and #5 in FY2025; down 6 since FY2022.
22	Leidos Holdings, Inc. 7 awardees, including Leidos, Inc., Leidos Biomedical Research Inc. and Leidos Security Detection & Automation, Inc. Top agencies NSF (National Science Foundation) HHS (Department of Health and Human Services) Army (Department of the Army)	$299,192,986	0.5%	Rank history: #20 in FY2021, #21 in FY2022, #21 in FY2024 and #21 in FY2025; down 1 since FY2022.
23	Michael Baker International, LLC Through Sallyport Global Holdings Inc. Top agencies USAF (Department of the Air Force)	$298,550,570	0.5%	Rank history: #34 in FY2021, #19 in FY2022, #30 in FY2024 and not on the FY2025 list; down 4 since FY2022.
24	Fedex Corp Through Fedex Supply Chain Distribution System, Inc. Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$292,660,865	0.5%	Rank history: #25 in FY2021, #22 in FY2022, #24 in FY2024 and #19 in FY2025; down 2 since FY2022.
25	Arctic Slope Regional Corporation 7 awardees, including Asrc Federal Field Services, LLC, Asrc Communications, Ltd. and Asrc Federal Professional Services, LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) DCSA (Defense Counterintelligence and Security Agency)	$272,476,683	0.5%	Rank history: #28 in FY2021, #28 in FY2022, #25 in FY2024 and #18 in FY2025; up 3 since FY2022.
26	Loyal Source Government Services LLC Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$267,757,413	0.4%	Rank history: #30 in FY2021, #45 in FY2022, #29 in FY2024 and #42 in FY2025; up 19 since FY2022.
27	Jacobs Engineering Group Inc. 3 awardees, including Amentum Technology, Inc. and Ch2M Facility Support Services, LLC Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$260,279,946	0.4%	Rank history: #23 in FY2021, #24 in FY2022, #96 in FY2024 and not on the FY2025 list; down 3 since FY2022.
28	The Chenega Corporation 13 awardees, including Chenega Global Protection, LLC, Chenega Facilities Management LLC and Chenega Tri-Services, LLC Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) HHS (Department of Health and Human Services)	$259,415,464	0.4%	Rank history: #44 in FY2021, #32 in FY2022, #87 in FY2024 and not on the FY2025 list; up 4 since FY2022.
29	Metropolitan Security Services, Inc. Top agencies AOUSC (Administrative Office of the U.S. Courts) DOJ (Department of Justice) GSA (General Services Administration)	$257,999,121	0.4%	Rank history: #33 in FY2021, #25 in FY2022, #17 in FY2024 and #17 in FY2025; down 4 since FY2022.
30	CACI International Inc. 5 awardees, including Caci, Inc. - Federal, Caci, LLC - Commercial and Caci Premier Technology, LLC Top agencies DCSA (Defense Counterintelligence and Security Agency) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$246,275,356	0.4%	Rank history: #22 in FY2021, #38 in FY2022, #31 in FY2024 and #24 in FY2025; up 8 since FY2022.
31	Nana Regional Corporation Inc 6 awardees, including Akima Global Services, LLC, Akima Support Operations, LLC and Akima Intra-Data, LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) Army (Department of the Army)	$244,780,214	0.4%	Rank history: #21 in FY2021, #29 in FY2022, #44 in FY2024 and #26 in FY2025; down 2 since FY2022.
32	Mvm, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$235,903,133	0.4%	Rank history: #46 in FY2021, #23 in FY2022, #36 in FY2024 and #37 in FY2025; down 9 since FY2022.
33	Pride Industries Top agencies Army (Department of the Army) USAF (Department of the Air Force) Treasury (Department of the Treasury)	$220,743,556	0.4%	Rank history: #32 in FY2021, #31 in FY2022, #37 in FY2024 and #46 in FY2025; down 2 since FY2022.
34	HP Enterprise Services LLC 3 awardees, including Peraton Risk Decision Inc. and Peraton Inc. Top agencies DCSA (Defense Counterintelligence and Security Agency) DHS (Department of Homeland Security) Navy (Department of the Navy)	$215,200,499	0.4%	Rank history: not on the FY2021 list, #40 in FY2022, #63 in FY2024 and not on the FY2025 list; up 6 since FY2022.
35	The Day & Zimmermann Group, Inc. 4 awardees, including American Ordnance LLC and SOC LLC Top agencies Army (Department of the Army) DOS (Department of State) DOE (Department of Energy)	$213,312,712	0.4%	Rank history: #26 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
36	Skookum Educational Programs Top agencies Army (Department of the Army) Navy (Department of the Navy) DHS (Department of Homeland Security)	$192,774,740	0.3%	Rank history: #40 in FY2021, #33 in FY2022, #38 in FY2024 and #29 in FY2025; down 3 since FY2022.
37	J & J Maintenance Inc. 3 awardees, including J&J and Alms Mission Support Solutions, LLC and J&J Germany GMBH Top agencies Army (Department of the Army) DECA (Defense Commissary Agency) Navy (Department of the Navy)	$191,604,022	0.3%	Rank history: #36 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
38	Corecivic, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$186,813,874	0.3%	Rank history: #31 in FY2021, #26 in FY2022, #40 in FY2024 and #23 in FY2025; down 12 since FY2022.
39	Ranger Land Systems, Inc. Top agencies DHS (Department of Homeland Security)	$180,038,843	0.3%	Rank history: not on the FY2021 list, #58 in FY2022 and not on the FY2024–FY2025 lists; up 19 since FY2022.
40	G4S Holding One Inc. 12 awardees, including G4S Secure Integration LLC, G4S Secure Solutions (USA) Inc. and G4S Peru S.a.c. Top agencies DOS (Department of State) DHS (Department of Homeland Security) Navy (Department of the Navy)	$163,906,112	0.3%	Rank history: #39 in FY2021, #37 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
41	Chugach Alaska Corporation 6 awardees, including Wolf Creek Federal Services LLC, Defense Base Services, LLC and Chugach Consolidated Solutions, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$159,580,519	0.3%	Rank history: #42 in FY2021, #41 in FY2022, #69 in FY2024 and not on the FY2025 list; unchanged since FY2022.
42	Inter-Con Security Systems, Inc. Top agencies DOS (Department of State) DOJ (Department of Justice) NARA (National Archives and Records Administration)	$157,505,522	0.3%	Rank history: #38 in FY2021, #35 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
43	Professional Contract Services, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DHA (Defense Health Agency)	$151,113,601	0.3%	Rank history: #47 in FY2021, #44 in FY2022, #43 in FY2024 and #32 in FY2025; up 1 since FY2022.
44	CSI Aviation, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$150,069,398	0.3%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2024 and #14 in FY2025; new.
45	Syncom Space Services LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) DFAS (Defense Finance and Accounting Service)	$146,326,083	0.2%	Rank history: #35 in FY2021, #36 in FY2022, #84 in FY2024 and not on the FY2025 list; down 9 since FY2022.
46	Teamstaff Inc. Through DLH Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$146,323,822	0.2%	Rank history: #81 in FY2021, #65 in FY2022, #46 in FY2024 and #55 in FY2025; up 19 since FY2022.
47	Tlingit Haida Tribal Business Corporation 5 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)	$146,029,737	0.2%	Rank history: #53 in FY2021, #42 in FY2022, #68 in FY2024 and not on the FY2025 list; down 5 since FY2022.
48	Covenant Aviation Security LLC Top agencies DHS (Department of Homeland Security)	$134,211,436	0.2%	Rank history: #50 in FY2021, #49 in FY2022, #45 in FY2024 and #40 in FY2025; up 1 since FY2022.
49	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top agencies DOJ (Department of Justice) DOS (Department of State)	$133,782,645	0.2%	Rank history: not on the FY2021 list, #48 in FY2022, #91 in FY2024 and not on the FY2025 list; down 1 since FY2022.
50	Deployed Services, LLC Top agencies HHS (Department of Health and Human Services)	$132,765,588	0.2%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2024 and not on the FY2025 list; new.
51	Pond Security Service GMBH Top agencies Army (Department of the Army) DOS (Department of State) DODEA (Department of Defense Education Activity)	$131,924,312	0.2%	Rank history: #48 in FY2021, #46 in FY2022, #55 in FY2024 and #45 in FY2025; down 5 since FY2022.
52	Dzsp 21 LLC Top agencies Navy (Department of the Navy)	$131,322,722	0.2%	Rank history: #57 in FY2021, #51 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
53	The Dewberry Companies LC Through Dewberry Engineers Inc. Top agencies DHS (Department of Homeland Security)	$119,134,168	0.2%	Rank history: not on the FY2021 list, #67 in FY2022 and not on the FY2024–FY2025 lists; up 14 since FY2022.
54	Peckham Vocational Industries, Inc. Top agencies DOS (Department of State) DLA (Defense Logistics Agency) USDA (Department of Agriculture)	$118,193,595	0.2%	Rank history: #69 in FY2021, #69 in FY2022, #35 in FY2024 and #27 in FY2025; up 15 since FY2022.
55	M. C. Dean Inc. Through M.c. Dean, Inc. Top agencies DOD (Department of Defense) AOUSC (Administrative Office of the U.S. Courts) USAF (Department of the Air Force)	$116,951,349	0.2%	Rank history: #60 in FY2021, #50 in FY2022, #53 in FY2024 and #41 in FY2025; down 5 since FY2022.
56	Afognak Native Corporation 9 awardees, including Alutiiq Commercial Enterprises LLC, Alutiiq Information Management, LLC and "Alutiiq Logistics & Maintenance Services, Llc" Top agencies DOS (Department of State) USAF (Department of the Air Force) DOE (Department of Energy)	$111,742,947	0.2%	Rank history: #27 in FY2021, #34 in FY2022 and not on the FY2024–FY2025 lists; down 22 since FY2022.
57	BC Partners LLP Through Gardaworld Federal Services LLC Top agencies DOS (Department of State) Navy (Department of the Navy)	$106,415,029	0.2%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and #36 in FY2025; up 137 since FY2022.
58	Loyalty Support Services Top agencies Army (Department of the Army)	$95,195,441	0.2%	Rank history: #59 in FY2021, #55 in FY2022, #57 in FY2024 and #28 in FY2025; down 3 since FY2022.
59	Universal Protection GP, LLC 2 awardees, including Universal Protection Service, Limited Partnership and Universal Protection Service, LLC Top agencies DHS (Department of Homeland Security) Smithsonian (Smithsonian Institution) DOI (Department of the Interior)	$94,520,631	0.2%	Rank history: not on the FY2021 list, #99 in FY2022 and not on the FY2024–FY2025 lists; up 40 since FY2022.
60	Facility Services Management, Inc. Top agencies Army (Department of the Army) NARA (National Archives and Records Administration) DHA (Defense Health Agency)	$93,545,844	0.2%	Rank history: #72 in FY2021, #77 in FY2022, #67 in FY2024 and not on the FY2025 list; up 17 since FY2022.
61	ITC Federal, LLC Top agencies DHS (Department of Homeland Security)	$92,697,722	0.2%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2024 and not on the FY2025 list; up 70 since FY2022.
62	King & George, LLC 2 awardees, including Invicta Global, LLC Top agencies Navy (Department of the Navy) GSA (General Services Administration) DHA (Defense Health Agency)	$92,477,407	0.2%	Rank history: #65 in FY2021, #54 in FY2022, not on the FY2024 list and #98 in FY2025; down 8 since FY2022.
63	Akima Facilities Operations LLC Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$85,933,713	0.1%	Rank history: not on the FY2021–FY2022 lists, #47 in FY2024 and #31 in FY2025; up 76 since FY2022.
64	Paragon Professional Services LLC Top agencies DHS (Department of Homeland Security) DOS (Department of State) USAF (Department of the Air Force)	$81,800,707	0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2024 and #51 in FY2025; up 356 since FY2022.
65	Union Station Venture, Ltd. Through Jones Lang Lasalle Americas, Inc. Top agencies GSA (General Services Administration) DECA (Defense Commissary Agency) DHS (Department of Homeland Security)	$79,851,039	0.1%	Rank history: not on the FY2021 list, #93 in FY2022 and not on the FY2024–FY2025 lists; up 28 since FY2022.
66	IAP Global Services LLC 4 awardees, including Readiness Management Support LC, IAP Worldwide Services, Inc. and Iap-Ecc LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$79,731,458	0.1%	Rank history: #41 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 36 since FY2022.
67	Weston Solutions Holdings, Inc. Through Weston Solutions, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) GSA (General Services Administration)	$77,647,853	0.1%	Rank history: not on the FY2021 list, #91 in FY2022, #82 in FY2024 and not on the FY2025 list; up 24 since FY2022.
68	ISS Action Inc. Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior) CFPB (Consumer Financial Protection Bureau)	$77,103,832	0.1%	Rank history: not on the FY2021 list, #95 in FY2022 and not on the FY2024–FY2025 lists; up 27 since FY2022.
69	Cherokee Nation Federal Consulting, L.L.C. Top agencies Treasury (Department of the Treasury) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$76,427,023	0.1%	Rank history: not on the FY2021 list, #47 in FY2022 and not on the FY2024–FY2025 lists; down 22 since FY2022.
70	Koa Lani JV LLC Top agencies Navy (Department of the Navy)	$74,619,739	0.1%	Rank history: not on the FY2021 list, #60 in FY2022, #83 in FY2024 and #74 in FY2025; down 10 since FY2022.
71	Servicesource Inc. Top agencies WHS (DOD Washington Headquarters Service) Treasury (Department of the Treasury) DOJ (Department of Justice)	$74,545,655	0.1%	Rank history: #89 in FY2021, #61 in FY2022, #70 in FY2024 and #61 in FY2025; down 10 since FY2022.
72	Melwood Horticultural Training Center, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$73,003,953	0.1%	Rank history: #63 in FY2021, #57 in FY2022, #64 in FY2024 and #59 in FY2025; down 15 since FY2022.
73	Vendtech-Sgi LLC Top agencies DHS (Department of Homeland Security)	$72,697,514	0.1%	Rank history: #74 in FY2021, #78 in FY2022, #75 in FY2024 and #66 in FY2025; up 5 since FY2022.
74	Brillient Corporation Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$71,407,563	0.1%	Rank history: #58 in FY2021, not on the FY2022 list, #85 in FY2024 and #77 in FY2025; up 388 since FY2022.
75	Kbr, Inc. 3 awardees, including KBR Wyle Services, LLC Top agencies Army (Department of the Army) AOUSC (Administrative Office of the U.S. Courts) DOT (Department of Transportation)	$71,327,445	0.1%	Rank history: #3 in FY2021, #3 in FY2022, #89 in FY2024 and not on the FY2025 list; down 72 since FY2022.
76	Emcor Group Inc. Through Emcor Government Services, Inc. Top agencies GSA (General Services Administration) GAO (Government Accountability Office) NARA (National Archives and Records Administration)	$69,877,678	0.1%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2024 and #60 in FY2025; up 285 since FY2022.
77	Didlake Inc. Top agencies Navy (Department of the Navy) DOE (Department of Energy) DLA (Defense Logistics Agency)	$65,642,462	0.1%	Rank history: #71 in FY2021, #59 in FY2022, #76 in FY2024 and #75 in FY2025; down 18 since FY2022.
78	Diversified Protection Corp Top agencies DHS (Department of Homeland Security) DOL (Department of Labor) EPA (Environmental Protection Agency)	$64,308,855	0.1%	Rank history: #66 in FY2021, #62 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
79	Johnson Controls Security Solutions LLC 10 awardees, including Johnson Controls Government Systems, LLC, Johnson Controls, Inc. and Johnson Controls Fire Protection LP Top agencies AOUSC (Administrative Office of the U.S. Courts) DHS (Department of Homeland Security) Navy (Department of the Navy)	$64,239,746	0.1%	Rank history: #55 in FY2021, #52 in FY2022 and not on the FY2024–FY2025 lists; down 27 since FY2022.
80	Koniag, Inc. 5 awardees, including Pacarctic, LLC, Koniag Brillient, LLC and Kadiak LLC Top agencies DHS (Department of Homeland Security) DOS (Department of State) DOJ (Department of Justice)	$63,257,655	0.1%	Rank history: #92 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 30 since FY2022.
81	Fedcap Rehabilitation Services, Inc. 2 awardees, including Community Workshops, Inc. Top agencies GSA (General Services Administration) SSA (Social Security Administration) DOI (Department of the Interior)	$62,781,737	0.1%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2024 and #70 in FY2025; up 49 since FY2022.
82	Sourceamerica Top agencies Army (Department of the Army) USAF (Department of the Air Force) Treasury (Department of the Treasury)	$62,314,750	0.1%	Rank history: not on the FY2021 list, #75 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
83	Action Facilities Management Inc. 2 awardees, including Action Integrated Services LLC Top agencies DOJ (Department of Justice) GSA (General Services Administration) Army (Department of the Army)	$61,930,973	0.1%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2024 and #64 in FY2025; up 39 since FY2022.
84	Nve, Inc. Top agencies DOS (Department of State) Treasury (Department of the Treasury) USDA (Department of Agriculture)	$61,898,589	0.1%	Rank history: not on the FY2021 list, #76 in FY2022, not on the FY2024 list and #65 in FY2025; down 8 since FY2022.
85	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies DOE (Department of Energy) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$61,826,468	0.1%	Rank history: not on the FY2021 list, #71 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
86	Pegasus Support Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) GSA (General Services Administration)	$59,664,238	0.1%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
87	Pond Constructors Inc. Top agencies DLA (Defense Logistics Agency)	$58,840,898	0.1%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2024 and #82 in FY2025; up 70 since FY2022.
88	Equifax Inc. 3 awardees, including Equifax Workforce Solutions LLC and Equifax Information Services LLC Top agencies USDA (Department of Agriculture) SSA (Social Security Administration) DCSA (Defense Counterintelligence and Security Agency)	$58,691,556	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 303 since FY2022.
89	Global Pacific Design Builders, LLC Top agencies Navy (Department of the Navy)	$57,450,892	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 96 since FY2022.
90	KBR Diego Garcia, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$56,182,375	0.1%	Rank history: #64 in FY2021, #100 in FY2022, #92 in FY2024 and not on the FY2025 list; up 10 since FY2022.
91	Aptim Federal Services LLC 2 awardees, including High Desert Support Services, LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DHS (Department of Homeland Security)	$55,928,427	0.1%	Rank history: #54 in FY2021, #56 in FY2022 and not on the FY2024–FY2025 lists; down 35 since FY2022.
92	Kerberos International Inc. 2 awardees, including Acadia Protective Services II, LLC Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior) EPA (Environmental Protection Agency)	$55,302,497	0.1%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2024 and #47 in FY2025; new.
93	Chenega Infinity, LLC Top agencies DHS (Department of Homeland Security) MDA (DOD Missile Defense Agency) DARPA (Defense Advanced Research Projects Agency)	$54,796,814	0.1%	Rank history: not on the FY2021 list, #86 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
94	EOD Technology Inc. Through Acuity - Janus Global, LLC Top agencies DOS (Department of State)	$53,934,320	0.1%	Rank history: #85 in FY2021, #73 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
95	CMI Management, LLC Top agencies HUD (Department of Housing and Urban Development) DHS (Department of Homeland Security) AFRH (Armed Forces Retirement Home)	$53,297,441	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 47 since FY2022.
96	Fleetcor Technologies Inc. Through Corporate Lodging Consultants, Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) EPA (Environmental Protection Agency)	$52,777,575	0.1%	Rank history: #45 in FY2021, #64 in FY2022 and not on the FY2024–FY2025 lists; down 32 since FY2022.
97	Sierra Nevada Company, LLC Top agencies USAF (Department of the Air Force)	$51,495,665	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 37 since FY2022.
98	Ids International Government Services LLC 2 awardees Top agencies DOS (Department of State) NARA (National Archives and Records Administration)	$51,157,541	0.1%	Rank history: not on the FY2021 list, #87 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
99	WE2 Support Services 8A JV LLC Top agencies DOE (Department of Energy)	$50,626,426	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 20 since FY2022.
100	Atkins Nuclear Secured Holdings Corporation Through Isotek Systems, LLC Top agencies DOE (Department of Energy)	$50,508,521	0.1%	Rank history: #87 in FY2021, #96 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.

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 $59.7 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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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