Top 100 Contractors in NAICS 56: Administrative and Support and Waste Management and Remediation Services, Jul 2025–Jun 2026

Name: Top 100 Contractors in NAICS 56: Administrative and Support and Waste Management and Remediation Services, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 45% of NAICS 56 contract dollars from July 2025 through June 2026

Contract obligations: $65,606,545,717 Net of deobligations, by contracts coded NAICS 56 or a code under it
Contractors: 9,962 Parent companies with an obligation
Largest contractor: Honeywell International Inc. $6.44 billion, 9.1% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Honeywell International Inc. 6 awardees, including National Technology & Engineering Solutions of Sandia, LLC and Honeywell Federal Manufacturing & Technologies, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) USAF (Department of the Air Force)	$6,435,089,063	9.1%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since Jul 2024–Jun 2025.
2	Triad National Security LLC 2 awardees Top agencies DOE (Department of Energy) DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$5,458,269,089	7.7%	Rank history: #2 in FY2021, #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since Jul 2024–Jun 2025.
3	Amentum Holdings, Inc. 28 awardees, including Amentum Services, Inc., United Cleanup Oak Ridge LLC and Idaho Environmental Coalition LLC Top agencies DOE (Department of Energy) Army (Department of the Army) DHS (Department of Homeland Security)	$4,167,772,510	5.9%	Rank history: not on the FY2021–FY2023 lists, #27 in FY2024 and #3 in FY2025; up 1 since Jul 2024–Jun 2025.
4	Fluor Corporation 5 awardees, including Savannah River Nuclear Solutions LLC, Fluor Intercontinental, Inc. and Fluor-Bwxt Portsmouth LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force) Navy (Department of the Navy)	$3,621,037,635	5.1%	Rank history: #9 in FY2021, #9 in FY2022, #16 in FY2023, #4 in FY2024 and #4 in FY2025; down 1 since Jul 2024–Jun 2025.
5	Ut-Battelle LLC Top agencies DOE (Department of Energy)	$3,090,480,030	4.4%	Rank history: #6 in FY2021, #6 in FY2022, #5 in FY2023, #5 in FY2024 and #5 in FY2025; up 1 since Jul 2024–Jun 2025.
6	Consolidated Nuclear Security, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) Army (Department of the Army)	$2,948,045,894	4.2%	Rank history: #4 in FY2021, #4 in FY2022, #3 in FY2023, #3 in FY2024 and #6 in FY2025; down 1 since Jul 2024–Jun 2025.
7	V2X, Inc. 4 awardees, including V2X Systems LLC, Vertex Modernization and Sustainment LLC and Vectrus Federal Services GMBH Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,944,332,577	2.8%	Rank history: not on the FY2021–FY2023 lists, #7 in FY2024 and #7 in FY2025; unchanged since Jul 2024–Jun 2025.
8	Pantexas Deterrence, LLC Top agencies DOE (Department of Energy) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,706,217,884	2.4%	Rank history: not on the FY2021–FY2024 lists and #8 in FY2025; up 1 since Jul 2024–Jun 2025.
9	Grimes Aerospace Company 3 awardees, including Honeywell Federal Manufacturing & Technologies, LLC and Honeywell International Inc. Top agencies DOE (Department of Energy) Navy (Department of the Navy) USAF (Department of the Air Force)	$1,224,392,918	1.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
10	CSI Aviation, Inc. Top agencies DHS (Department of Homeland Security)	$1,179,226,376	1.7%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2023, #31 in FY2024 and #19 in FY2025; up 12 since Jul 2024–Jun 2025.
11	Savannah River Mission Completion, LLC Top agencies DOE (Department of Energy)	$1,168,123,719	1.7%	Rank history: not on the FY2021 list, #17 in FY2022, #13 in FY2023, #11 in FY2024 and #13 in FY2025; up 4 since Jul 2024–Jun 2025.
12	KBR Wyle Services LLC 3 awardees, including KBR Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,072,492,571	1.5%	Rank history: not on the FY2021–FY2023 lists, #8 in FY2024 and #11 in FY2025; down 1 since Jul 2024–Jun 2025.
13	The GEO Group, Inc. 4 awardees, including B.i. Incorporated, GEO Transport, Inc. and GEO Secure Services, LLC Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$973,134,741	1.4%	Rank history: #16 in FY2021, #13 in FY2022, #14 in FY2023, #12 in FY2024 and #15 in FY2025; up 4 since Jul 2024–Jun 2025.
14	Mission Support & Test Services LLC Top agencies DOE (Department of Energy) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$956,315,599	1.4%	Rank history: #12 in FY2021, #10 in FY2022, #11 in FY2023, #9 in FY2024 and #14 in FY2025; unchanged since Jul 2024–Jun 2025.
15	Hanford Tank Waste Operations & Closure, LLC Top agencies DOE (Department of Energy)	$841,002,959	1.2%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; up 5 since Jul 2024–Jun 2025.
16	Lockheed Martin Corporation 6 awardees Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force) Army (Department of the Army)	$823,726,209	1.2%	Rank history: #13 in FY2021, #12 in FY2022, #17 in FY2023, #13 in FY2024 and #16 in FY2025; unchanged since Jul 2024–Jun 2025.
17	Maximus Federal Services, Inc. Top agencies HHS (Department of Health and Human Services) WHS (DOD Washington Headquarters Service) Treasury (Department of the Treasury)	$785,139,868	1.1%	Rank history: not on the FY2021–FY2023 lists, #14 in FY2024 and #12 in FY2025; down 5 since Jul 2024–Jun 2025.
18	Arctic Slope Regional Corporation 15 awardees, including RSI Entech, LLC, Asrc Federal Field Services, LLC and Asrc Federal Facilities Logistics LLC Top agencies USAF (Department of the Air Force) DOE (Department of Energy) NASA (National Aeronautics and Space Administration)	$565,282,200	0.8%	Rank history: #25 in FY2021, #27 in FY2022, #26 in FY2023, #33 in FY2024 and #18 in FY2025; up 10 since Jul 2024–Jun 2025.
19	General Dynamics Corporation 9 awardees, including General Dynamics OTS (Wilkes Barre), LLC, General Dynamics Information Technology, Inc. and General Dynamics Land Systems Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$538,470,337	0.8%	Rank history: #30 in FY2021, #19 in FY2022, #10 in FY2023, #17 in FY2024 and #25 in FY2025; up 6 since Jul 2024–Jun 2025.
20	Metropolitan Security Services, Inc. Top agencies AOUSC (Administrative Office of the U.S. Courts) DOJ (Department of Justice) GSA (General Services Administration)	$531,119,601	0.8%	Rank history: #36 in FY2021, #28 in FY2022, #32 in FY2023, #21 in FY2024 and #22 in FY2025; down 1 since Jul 2024–Jun 2025.
21	Securitas Electronic Security Inc. 2 awardees, including Paragon Systems Inc. Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$463,575,366	0.7%	Rank history: not on the FY2021–FY2023 lists, #36 in FY2024 and #20 in FY2025; down 3 since Jul 2024–Jun 2025.
22	Strategic Storage Partners, Llc. Top agencies DOE (Department of Energy)	$424,026,021	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
23	Fedex Corp Through Fedex Supply Chain Distribution System, Inc. Top agencies VA (Department of Veterans Affairs)	$405,786,021	0.6%	Rank history: #27 in FY2021, #25 in FY2022, #29 in FY2023, #32 in FY2024 and #23 in FY2025; unchanged since Jul 2024–Jun 2025.
24	CACI International Inc. 4 awardees, including Caci, Inc. - Federal Top agencies DCSA (Defense Counterintelligence and Security Agency) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$344,950,195	0.5%	Rank history: #24 in FY2021, #41 in FY2022, #33 in FY2023, #39 in FY2024 and #28 in FY2025; up 5 since Jul 2024–Jun 2025.
25	Nana Regional Corporation, Inc. 9 awardees, including Akima Global Logistics, LLC, Akima Facilities Operations LLC and Akima Intra-Data, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$342,042,554	0.5%	Rank history: not on the FY2021–FY2023 lists, #76 in FY2024 and #32 in FY2025; up 121 since Jul 2024–Jun 2025.
26	Corecivic, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$335,807,592	0.5%	Rank history: #32 in FY2021, #29 in FY2022, #43 in FY2023, #50 in FY2024 and #27 in FY2025; up 11 since Jul 2024–Jun 2025.
27	Leidos Holdings, Inc. 7 awardees, including Leidos, Inc., Hanford Mission Integration Solutions, LLC and Leidos Security Detection & Automation, Inc. Top agencies NSF (National Science Foundation) DOE (Department of Energy) Army (Department of the Army)	$326,675,349	0.5%	Rank history: #22 in FY2021, #23 in FY2022, #27 in FY2023, #28 in FY2024 and #24 in FY2025; unchanged since Jul 2024–Jun 2025.
28	Triple Canopy Inc. Top agencies DHS (Department of Homeland Security) DOS (Department of State) Army (Department of the Army)	$318,351,699	0.5%	Rank history: #14 in FY2021, #11 in FY2022, #22 in FY2023, #40 in FY2024 and #26 in FY2025; down 4 since Jul 2024–Jun 2025.
29	Skookum Educational Programs Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$302,131,871	0.4%	Rank history: #43 in FY2021, #36 in FY2022, #41 in FY2023, #47 in FY2024 and #37 in FY2025; up 16 since Jul 2024–Jun 2025.
30	Peraton Risk Decision Inc. Top agencies DCSA (Defense Counterintelligence and Security Agency) DHS (Department of Homeland Security)	$276,248,330	0.4%	Rank history: not on the FY2021–FY2023 lists, #62 in FY2024 and #29 in FY2025; up 1 since Jul 2024–Jun 2025.
31	Inter-CON Security Systems Inc. Top agencies DOS (Department of State) DOJ (Department of Justice) GAO (Government Accountability Office)	$233,027,191	0.3%	Rank history: not on the FY2021–FY2023 lists, #60 in FY2024 and #44 in FY2025; up 35 since Jul 2024–Jun 2025.
32	Akima Infrastructure Protection LLC Top agencies DHS (Department of Homeland Security)	$224,135,531	0.3%	Rank history: not on the FY2021–FY2024 lists and #47 in FY2025; up 50 since Jul 2024–Jun 2025.
33	Nova Space Solutions, LLC Top agencies NASA (National Aeronautics and Space Administration)	$222,742,114	0.3%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; up 236 since Jul 2024–Jun 2025.
34	Covenant Aviation Security, LLC Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$221,637,098	0.3%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; up 173 since Jul 2024–Jun 2025.
35	Loyalty Support Services Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$212,587,019	0.3%	Rank history: #65 in FY2021, #64 in FY2022, #68 in FY2023, #73 in FY2024 and #36 in FY2025; up 20 since Jul 2024–Jun 2025.
36	Universal Protection Service, Limited Partnership Top agencies DHS (Department of Homeland Security) Smithsonian (Smithsonian Institution) DOS (Department of State)	$212,502,032	0.3%	Rank history: not on the FY2021–FY2024 lists and #64 in FY2025; up 40 since Jul 2024–Jun 2025.
37	Professional Contract Services, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DHA (Defense Health Agency)	$197,634,210	0.3%	Rank history: #53 in FY2021, #48 in FY2022, #50 in FY2023, #55 in FY2024 and #41 in FY2025; up 16 since Jul 2024–Jun 2025.
38	Peckham Vocational Industries Inc. Top agencies DOS (Department of State) DLA (Defense Logistics Agency)	$183,847,501	0.3%	Rank history: #77 in FY2021, #83 in FY2022, #61 in FY2023, #42 in FY2024 and #33 in FY2025; up 10 since Jul 2024–Jun 2025.
39	Akima Facilities Operations LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$174,702,951	0.2%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2023, #58 in FY2024 and #40 in FY2025; up 11 since Jul 2024–Jun 2025.
40	M.c. Dean, Inc. Top agencies DOT (Department of Transportation) DOD (Department of Defense) AOUSC (Administrative Office of the U.S. Courts)	$158,196,730	0.2%	Rank history: #66 in FY2021, #56 in FY2022, #62 in FY2023, #63 in FY2024 and #52 in FY2025; up 22 since Jul 2024–Jun 2025.
41	Ashbritt Inc. Top agencies Army (Department of the Army)	$158,046,577	0.2%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; down 31 since Jul 2024–Jun 2025.
42	Chenega Global Protection, LLC Top agencies NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services) Army (Department of the Army)	$157,882,579	0.2%	Rank history: not on the FY2021–FY2023 lists, #64 in FY2024 and #42 in FY2025; up 12 since Jul 2024–Jun 2025.
43	Paragon Professional Services LLC Top agencies DHS (Department of Homeland Security) DOS (Department of State) EPA (Environmental Protection Agency)	$147,970,319	0.2%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023, #65 in FY2024 and #51 in FY2025; up 17 since Jul 2024–Jun 2025.
44	Guidehouse Inc. 3 awardees, including Aptim Federal Services, LLC Top agencies Army (Department of the Army) DOE (Department of Energy) Navy (Department of the Navy)	$144,099,972	0.2%	Rank history: not on the FY2021–FY2023 lists, #54 in FY2024 and #50 in FY2025; up 7 since Jul 2024–Jun 2025.
45	Hydrogeologic, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$140,965,215	0.2%	Rank history: #44 in FY2021, #57 in FY2022, #45 in FY2023, #52 in FY2024 and #54 in FY2025; up 12 since Jul 2024–Jun 2025.
46	BC Partners LLP Through Gardaworld Federal Services LLC Top agencies DOS (Department of State) Army (Department of the Army) Navy (Department of the Navy)	$140,943,717	0.2%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023, #51 in FY2024 and #45 in FY2025; down 8 since Jul 2024–Jun 2025.
47	J & J Maintenance Inc. Top agencies Army (Department of the Army) DECA (Defense Commissary Agency) DHA (Defense Health Agency)	$138,029,755	0.2%	Rank history: not on the FY2021–FY2023 lists, #61 in FY2024 and #43 in FY2025; down 1 since Jul 2024–Jun 2025.
48	Kerberos International Inc. Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior)	$131,585,581	0.2%	Rank history: not on the FY2021–FY2023 lists, #71 in FY2024 and #60 in FY2025; up 21 since Jul 2024–Jun 2025.
49	Blackwatch International Corporation Top agencies DMEA (Defense Microelectronics Activity)	$128,512,086	0.2%	Rank history: not on the FY2021–FY2025 lists; up 357 since Jul 2024–Jun 2025.
50	Environmental Restoration LLC Top agencies EPA (Environmental Protection Agency) DOJ (Department of Justice) Army (Department of the Army)	$127,259,158	0.2%	Rank history: #69 in FY2021, #49 in FY2022, #67 in FY2023, not on the FY2024 list and #65 in FY2025; up 65 since Jul 2024–Jun 2025.
51	JBW Group LLC Top agencies Army (Department of the Army) DOS (Department of State) USAF (Department of the Air Force)	$122,362,400	0.2%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; up 30 since Jul 2024–Jun 2025.
52	Pride Industries Top agencies USAF (Department of the Air Force) Army (Department of the Army) Treasury (Department of the Treasury)	$118,482,463	0.2%	Rank history: #34 in FY2021, #34 in FY2022, #38 in FY2023, #45 in FY2024 and #59 in FY2025; down 12 since Jul 2024–Jun 2025.
53	Pond Security Service GMBH Top agencies Army (Department of the Army) DOS (Department of State) DECA (Defense Commissary Agency)	$117,328,021	0.2%	Rank history: #54 in FY2021, #51 in FY2022, #58 in FY2023, #66 in FY2024 and #58 in FY2025; up 15 since Jul 2024–Jun 2025.
54	Centerra Group, LLC Top agencies AOUSC (Administrative Office of the U.S. Courts) DOE (Department of Energy) Commerce (Department of Commerce)	$110,611,851	0.2%	Rank history: not on the FY2021–FY2023 lists, #59 in FY2024 and #62 in FY2025; up 7 since Jul 2024–Jun 2025.
55	Bechtel Parsons Blue Grass, A Joint Venture Top agencies Army (Department of the Army)	$109,599,732	0.2%	Rank history: not on the FY2021–FY2023 lists, #30 in FY2024 and #30 in FY2025; down 23 since Jul 2024–Jun 2025.
56	Hanford Laboratory Management and Integration LLC Top agencies DOE (Department of Energy)	$106,922,566	0.2%	Rank history: not on the FY2021 list, #74 in FY2022, #77 in FY2023, #67 in FY2024 and #67 in FY2025; up 8 since Jul 2024–Jun 2025.
57	Jones Lang Lasalle Americas, Inc. Top agencies GSA (General Services Administration) DECA (Defense Commissary Agency) DOT (Department of Transportation)	$106,857,872	0.2%	Rank history: not on the FY2021–FY2023 lists, #74 in FY2024 and #71 in FY2025; up 23 since Jul 2024–Jun 2025.
58	Action Facilities Management Inc. Top agencies GSA (General Services Administration) DOJ (Department of Justice) DHS (Department of Homeland Security)	$105,403,591	0.1%	Rank history: not on the FY2021–FY2024 lists and #84 in FY2025; up 28 since Jul 2024–Jun 2025.
59	Chugach Logistics and Facility Services JV, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$104,628,909	0.1%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 41 since Jul 2024–Jun 2025.
60	Serco Inc 2 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$104,594,694	0.1%	Rank history: not on the FY2021–FY2023 lists, #78 in FY2024 and #69 in FY2025; up 24 since Jul 2024–Jun 2025.
61	West Valley Cleanup Alliance, LLC Top agencies DOE (Department of Energy)	$104,567,286	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
62	EA Engineering Science and Technology Inc. PBC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) Navy (Department of the Navy)	$103,738,555	0.1%	Rank history: not on the FY2021–FY2023 lists, #46 in FY2024 and #63 in FY2025; down 26 since Jul 2024–Jun 2025.
63	G4S Secure Solutions (USA) Inc. Top agencies DHS (Department of Homeland Security)	$102,867,149	0.1%	Rank history: not on the FY2021–FY2024 lists and #75 in FY2025; up 71 since Jul 2024–Jun 2025.
64	Parsons Corporation 4 awardees, including Xator LLC, Parsons Government Services Inc. and Ptsi Managed Services Inc. Top agencies DOS (Department of State) USAF (Department of the Air Force) Army (Department of the Army)	$98,141,773	0.1%	Rank history: not on the FY2021–FY2023 lists, #10 in FY2024 and #21 in FY2025; down 51 since Jul 2024–Jun 2025.
65	Emcor Group Inc. 3 awardees, including Emcor Government Services, Inc., Mesa Energy Systems, Inc. and S A Comunale Co Inc. Top agencies GSA (General Services Administration) NARA (National Archives and Records Administration) GAO (Government Accountability Office)	$97,194,611	0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023, #95 in FY2024 and #79 in FY2025; up 36 since Jul 2024–Jun 2025.
66	Pegasus Support Services LLC Top agencies Army (Department of the Army) GSA (General Services Administration) DHS (Department of Homeland Security)	$96,434,993	0.1%	Rank history: not on the FY2021–FY2023 lists, #99 in FY2024 and #87 in FY2025; up 47 since Jul 2024–Jun 2025.
67	Tetra Tech, Inc. 11 awardees, including Tetra TECH EC, Inc. Top agencies DOS (Department of State) Army (Department of the Army) EPA (Environmental Protection Agency)	$92,451,776	0.1%	Rank history: #78 in FY2021, #55 in FY2022, #47 in FY2023, #72 in FY2024 and #68 in FY2025; up 11 since Jul 2024–Jun 2025.
68	North Wind Portage, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army)	$92,259,460	0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #72 in FY2025; up 2 since Jul 2024–Jun 2025.
69	Sevenson Environmental Services, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) Navy (Department of the Navy)	$91,940,821	0.1%	Rank history: #92 in FY2021, #60 in FY2022, #74 in FY2023, #25 in FY2024 and #38 in FY2025; down 48 since Jul 2024–Jun 2025.
70	Ho-Chunk, Inc. 5 awardees, including Dynamic-Hhs JV, LLC, HCI Management Services Company and Ho-Chunk Shared Services Company Top agencies DHA (Defense Health Agency) DOS (Department of State) USAF (Department of the Air Force)	$90,640,799	0.1%	Rank history: not on the FY2021–FY2025 lists; up 139 since Jul 2024–Jun 2025.
71	ECC International, LLC Top agencies USAF (Department of the Air Force)	$89,793,172	0.1%	Rank history: not on the FY2021–FY2024 lists and #39 in FY2025; up 3 since Jul 2024–Jun 2025.
72	Navarro Research and Engineering, Inc. Top agencies DOE (Department of Energy) Army (Department of the Army)	$86,864,638	0.1%	Rank history: #73 in FY2021, #98 in FY2022, #97 in FY2023, #100 in FY2024 and #98 in FY2025; up 35 since Jul 2024–Jun 2025.
73	Bradley Technologies Inc. Top agencies DHS (Department of Homeland Security) CSOSA (Court Services and Offender Supervision Agency) Army (Department of the Army)	$86,113,419	0.1%	Rank history: not on the FY2021–FY2024 lists and #74 in FY2025; up 15 since Jul 2024–Jun 2025.
74	Equifax Workforce Solutions LLC Top agencies SSA (Social Security Administration) DCSA (Defense Counterintelligence and Security Agency) DOS (Department of State)	$85,970,467	0.1%	Rank history: not on the FY2021–FY2024 lists and #91 in FY2025; up 57 since Jul 2024–Jun 2025.
75	Mvm, Inc. Top agencies DHS (Department of Homeland Security)	$85,124,399	0.1%	Rank history: #52 in FY2021, #26 in FY2022, #37 in FY2023, #44 in FY2024 and #46 in FY2025; down 36 since Jul 2024–Jun 2025.
76	Kemron Environmental Services Inc. 3 awardees, including Kemron / Arrowhead JV, LLC Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$82,792,349	0.1%	Rank history: not on the FY2021–FY2023 lists, #69 in FY2024 and not on the FY2025 list; up 21 since Jul 2024–Jun 2025.
77	Vendtech-Sgi LLC Top agencies DHS (Department of Homeland Security)	$82,353,426	0.1%	Rank history: #85 in FY2021, #94 in FY2022, #88 in FY2023, #97 in FY2024 and #86 in FY2025; up 15 since Jul 2024–Jun 2025.
78	AED Stratecon LLC Top agencies DOS (Department of State)	$81,685,728	0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; new, not ranked in Jul 2024–Jun 2025.
79	Servicesource Inc. Top agencies Treasury (Department of the Treasury) WHS (DOD Washington Headquarters Service) Army (Department of the Army)	$80,792,470	0.1%	Rank history: not on the FY2021 list, #71 in FY2022, #86 in FY2023, #92 in FY2024 and #81 in FY2025; down 7 since Jul 2024–Jun 2025.
80	Melwood Horticultural Training Center, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USDA (Department of Agriculture)	$80,493,353	0.1%	Rank history: #70 in FY2021, #66 in FY2022, #87 in FY2023, #86 in FY2024 and #78 in FY2025; up 13 since Jul 2024–Jun 2025.
81	Nve, Inc. Top agencies DOS (Department of State) Treasury (Department of the Treasury) USDA (Department of Agriculture)	$80,482,127	0.1%	Rank history: not on the FY2021 list, #92 in FY2022, not on the FY2023–FY2024 lists and #85 in FY2025; up 46 since Jul 2024–Jun 2025.
82	Tmsab LLC Top agencies Army (Department of the Army)	$80,148,463	0.1%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; up 3 since Jul 2024–Jun 2025.
83	Loyal Source Government Services LLC Top agencies DHS (Department of Homeland Security) DHA (Defense Health Agency)	$79,494,704	0.1%	Rank history: #31 in FY2021, #50 in FY2022, #30 in FY2023, #37 in FY2024 and #53 in FY2025; down 40 since Jul 2024–Jun 2025.
84	Energy Technology Alliance LLC Top agencies DOE (Department of Energy)	$78,984,913	0.1%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #77 in FY2025; down 9 since Jul 2024–Jun 2025.
85	Koa Lani JV LLC Top agencies Navy (Department of the Navy)	$74,316,573	0.1%	Rank history: not on the FY2021 list, #70 in FY2022, #85 in FY2023, not on the FY2024 list and #94 in FY2025; up 10 since Jul 2024–Jun 2025.
86	Weston Solutions Holdings Inc Through Weston Solutions Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$74,079,909	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
87	Global Connections To Employment, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$73,916,512	0.1%	Rank history: not on the FY2021–FY2025 lists; up 27 since Jul 2024–Jun 2025.
88	Chimes International, Ltd. Through Chimes District of Columbia Inc. Top agencies Army (Department of the Army) WHS (DOD Washington Headquarters Service) GSA (General Services Administration)	$73,315,602	0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; up 24 since Jul 2024–Jun 2025.
89	T&H Services, LLC Top agencies Army (Department of the Army) DOS (Department of State) Navy (Department of the Navy)	$73,213,593	0.1%	Rank history: not on the FY2021–FY2024 lists and #89 in FY2025; up 15 since Jul 2024–Jun 2025.
90	Pond Constructors Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$73,056,556	0.1%	Rank history: not on the FY2021–FY2025 lists; up 9 since Jul 2024–Jun 2025.
91	American Eagle Protective Services Corp Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice)	$72,848,305	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
92	CDA Incorporated Top agencies DHS (Department of Homeland Security)	$71,781,545	0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; down 5 since Jul 2024–Jun 2025.
93	VMD Systems Integrators Inc Top agencies DHS (Department of Homeland Security)	$71,525,432	0.1%	Rank history: not on the FY2021–FY2025 lists; up 132 since Jul 2024–Jun 2025.
94	South Dade Air Conditioning & Refrigeration Inc. Top agencies GSA (General Services Administration) OPM (Office of Personnel Management) Army (Department of the Army)	$71,085,810	0.1%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 26 since Jul 2024–Jun 2025.
95	Tiya Services L.L.C. Top agencies Army (Department of the Army)	$70,865,624	0.1%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; up 21 since Jul 2024–Jun 2025.
96	Performant Financial Corporation Through Performant Recovery, Inc. Top agencies HHS (Department of Health and Human Services)	$69,200,000	0.1%	Rank history: not on the FY2021–FY2025 lists; up 46 since Jul 2024–Jun 2025.
97	Bechtel Corp Through Bechtel National, Inc. Top agencies Army (Department of the Army)	$68,453,847	0.1%	Rank history: #17 in FY2021, #14 in FY2022, #12 in FY2023, #19 in FY2024 and #35 in FY2025; down 63 since Jul 2024–Jun 2025.
98	Atkins Nuclear Secured Holdings Corporation Through Isotek Systems, LLC Top agencies DOE (Department of Energy)	$68,378,923	0.1%	Rank history: not on the FY2021–FY2025 lists; up 21 since Jul 2024–Jun 2025.
99	Titan-Auxo, LLC Top agencies VA (Department of Veterans Affairs)	$64,812,874	0.1%	Rank history: not on the FY2021–FY2025 lists; up 164 since Jul 2024–Jun 2025.
100	CW Resources, Inc. Top agencies DECA (Defense Commissary Agency) Army (Department of the Army) USAF (Department of the Air Force)	$64,792,391	0.1%	Rank history: not on the FY2021–FY2025 lists; up 21 since Jul 2024–Jun 2025.

Show 75 more

100 of 9,962 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 56

Code	Net obligations	Largest contractor
561 Administrative and Support Services	$57,110,291,985	Honeywell International Inc.
562 Waste Management and Remediation Services	$8,496,253,732	Amentum Holdings, Inc.

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 $70.6 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.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Jul 2024–Jun 2025. "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.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 56 contractors in Jul 2025–Jun 2026?

1. Honeywell International Inc. ($6.44B), 2. Triad National Security LLC ($5.46B), 3. Amentum Holdings, Inc. ($4.17B), 4. Fluor Corporation ($3.62B), 5. Ut-Battelle LLC ($3.09B), 6. Consolidated Nuclear Security, LLC ($2.95B), 7. V2X, Inc. ($1.94B), 8. Pantexas Deterrence, LLC ($1.71B), 9. Grimes Aerospace Company ($1.22B), 10. CSI Aviation, Inc. ($1.18B).

On GovTribe

Research every contractor on this list

Every contract, task order and IDV they hold
Their subsidiaries, teammates and competitors
Open opportunities they're positioned for
Alerts when they win new work

Try for free Login