Top 100 Contractors in PSC H: Quality Control, Test, Inspection, FY2021

Name: Top 100 Contractors in PSC H: Quality Control, Test, Inspection, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 55% of FY2021 PSC H contract dollars

Contract obligations: $1,732,864,014 Net of deobligations, by contracts coded PSC H or a code under it
Contractors: 2,503 Parent companies with an obligation
Largest contractor: RTX Corporation $340 million, 18.3% 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	RTX Corporation 17 awardees, including Raytheon Company, Rockwell Collins, Inc. and Hamilton Sundstrand Corporation Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) Army (Department of the Army)	$340,102,219	18.3%	Rank history: #5 in FY2022, #8 in FY2023, #2 in FY2024 and #2 in FY2025; up 17 since FY2020.
2	Northrop Grumman Corporation 9 awardees, including Northrop Grumman Systems Corporation, Alliant Techsystems Operations LLC and Scaled Composites, LLC Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$152,889,191	8.2%	Rank history: #1 in FY2022, #1 in FY2023, #10 in FY2024 and #11 in FY2025; up 52 since FY2020.
3	Reliance Test & Technology, LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$118,239,044	6.3%	Rank history: #3 in FY2022, #4 in FY2023, #3 in FY2024 and #4 in FY2025; unchanged since FY2020.
4	Vanguard Inspection Services Top agencies DHS (Department of Homeland Security)	$103,221,581	5.5%	Rank history: #7 in FY2022, #7 in FY2023, #13 in FY2024 and #8 in FY2025; up 17 since FY2020.
5	Parsons Brinckerhoff Holdings Inc. Through WSP USA Services Inc. Top agencies DHS (Department of Homeland Security)	$80,300,042	4.3%	Rank history: #9 in FY2022, #79 in FY2023, #56 in FY2024 and not on the FY2025 list; up 10 since FY2020.
6	L3Harris Technologies, Inc. 7 awardees, including L3Harris Interstate Electronics Corporation, L3 Technologies, Inc. and Stellant Systems Inc. Top agencies Navy (Department of the Navy) DOJ (Department of Justice) Smithsonian (Smithsonian Institution)	$64,059,161	3.4%	Rank history: #2 in FY2022, #2 in FY2023, #4 in FY2024 and #3 in FY2025; down 1 since FY2020.
7	Logistic Services International, Inc. Top agencies Army (Department of the Army)	$56,039,470	3.0%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
8	Lockheed Martin Corporation 10 awardees, including Sikorsky Aircraft Corporation and Lockheed Martin Coherent Technologies, Inc. Top agencies MDA (DOD Missile Defense Agency) DOJ (Department of Justice) Navy (Department of the Navy)	$44,097,882	2.4%	Rank history: #4 in FY2022, #3 in FY2023, #16 in FY2024 and #5 in FY2025; down 6 since FY2020.
9	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies USAF (Department of the Air Force) NSA (Department of Defense National Security Agency) Navy (Department of the Navy)	$35,246,780	1.9%	Rank history: #6 in FY2022, #6 in FY2023, #5 in FY2024 and #21 in FY2025; up 31 since FY2020.
10	Peckham Vocational Industries, Inc. Top agencies Army (Department of the Army)	$27,008,212	1.4%	Rank history: #11 in FY2022, #13 in FY2023, #11 in FY2024 and #7 in FY2025; new, not ranked in FY2020.
11	Johnson Controls Security Solutions LLC 16 awardees, including Johnson Controls Government Systems, LLC, Johnson Controls, Inc. and Johnson Controls Fire Protection LP Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) DFAS (Defense Finance and Accounting Service)	$26,819,910	1.4%	Rank history: #10 in FY2022, #16 in FY2023, #31 in FY2024 and not on the FY2025 list; up 2 since FY2020.
12	The Boeing Company 7 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$26,345,280	1.4%	Rank history: #12 in FY2022, #12 in FY2023, #8 in FY2024 and #52 in FY2025; up 4 since FY2020.
13	Perspecta Inc. Through Peraton Enterprise Solutions LLC Top agencies DCSA (Defense Counterintelligence and Security Agency)	$23,016,178	1.2%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
14	The Bionetics Corp Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$20,282,759	1.1%	Rank history: #14 in FY2022, #17 in FY2023, #18 in FY2024 and #17 in FY2025; down 4 since FY2020.
15	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top agencies USDA (Department of Agriculture)	$19,850,300	1.1%	Rank history: #13 in FY2022, #30 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
16	Tyonek Native Corporatio 2 awardees, including Tyonek Global Services LLC and Tyonek Services Overhaul Facility-Stennis, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$15,983,768	0.9%	Rank history: #15 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
17	National Collegiate Inventors & Innovators Alliance, Inc. Top agencies HHS (Department of Health and Human Services)	$15,860,152	0.9%	Rank history: #8 in FY2022, #9 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
18	Abbott Laboratories 5 awardees, including Abbott Molecular Inc., Abbott Rapid Diagnostics Informatics, Inc. and Abbott Rapid DX North America LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$14,574,988	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	HP Enterprise Services LLC 4 awardees, including Peraton Inc. and Peraton Enterprise Solutions LLC Top agencies Navy (Department of the Navy) DCSA (Defense Counterintelligence and Security Agency)	$14,291,777	0.8%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
20	Honeywell International Inc. 7 awardees, including Vindicator Technologies, Inc. Top agencies Army (Department of the Army) DOT (Department of Transportation) DOI (Department of the Interior)	$14,198,615	0.8%	Rank history: #22 in FY2022, #21 in FY2023, #59 in FY2024 and #38 in FY2025; down 1 since FY2020.
21	AECOM 3 awardees, including AECOM Technical Services, Inc. and AECOM Usa, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$14,037,420	0.8%	Rank history: #26 in FY2022, #40 in FY2023, #83 in FY2024 and not on the FY2025 list; down 4 since FY2020.
22	General Dynamics Corporation 5 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy)	$13,089,884	0.7%	Rank history: #23 in FY2022, #27 in FY2023, #23 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
23	National Security Technology Accelerator Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$12,897,557	0.7%	Rank history: #43 in FY2022, #50 in FY2023, not on the FY2024 list and #23 in FY2025; new, not ranked in FY2020.
24	Man-Machine Systems Assessment (Msa), Incorporated Top agencies Army (Department of the Army)	$12,409,001	0.7%	Rank history: #16 in FY2022, #20 in FY2023, #20 in FY2024 and #18 in FY2025; down 1 since FY2020.
25	Kbr, Inc. 2 awardees, including KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$10,825,437	0.6%	Rank history: #25 in FY2022, #25 in FY2023, #88 in FY2024 and not on the FY2025 list; up 14 since FY2020.
26	Versar Inc. Top agencies Army (Department of the Army)	$10,079,216	0.5%	Rank history: #28 in FY2022, #46 in FY2023, #41 in FY2024 and not on the FY2025 list; down 4 since FY2020.
27	Oneida Engineering Solutions LLC Top agencies DOJ (Department of Justice)	$9,895,914	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	Goldbelt, Incorporated Through Goldbelt Falcon LLC Top agencies USAF (Department of the Air Force)	$9,176,577	0.5%	Rank history: #39 in FY2022 and not on the FY2023–FY2025 lists; up 7 since FY2020.
29	Psi Services LLC Through Performance Assessment Network, Inc. Top agencies DHS (Department of Homeland Security)	$8,832,598	0.5%	Rank history: #32 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
30	Sparksoft Corporation Top agencies HHS (Department of Health and Human Services)	$8,548,106	0.5%	Rank history: #21 in FY2022, #22 in FY2023 and not on the FY2024–FY2025 lists; up 21 since FY2020.
31	Predictant, LLC Top agencies USAF (Department of the Air Force)	$8,484,390	0.5%	Rank history: #17 in FY2022, #23 in FY2023, #26 in FY2024 and not on the FY2025 list; up 5 since FY2020.
32	Joint Research and Development LLC Top agencies Army (Department of the Army)	$8,128,589	0.4%	Rank history: #34 in FY2022, #33 in FY2023, #30 in FY2024 and #46 in FY2025; up 88 since FY2020.
33	Linde LLC Through Linde Special Projects LLC Top agencies USAF (Department of the Air Force)	$7,208,720	0.4%	Rank history: not on the FY2022–FY2023 lists, #34 in FY2024 and not on the FY2025 list; down 7 since FY2020.
34	CAE Inc. Through CAE USA Mission Solutions Inc. Top agencies USAF (Department of the Air Force)	$6,600,000	0.4%	Rank history: #48 in FY2022, #47 in FY2023 and not on the FY2024–FY2025 lists; up 27 since FY2020.
35	Amentum Services, Inc. 3 awardees Top agencies Navy (Department of the Navy)	$6,003,488	0.3%	Rank history: #42 in FY2022, not on the FY2023 list, #24 in FY2024 and not on the FY2025 list; up 77 since FY2020.
36	State of California Controllers Office 4 awardees, including California Department of Public Health, California Department of Food & Agriculture and State of California Water Resources Control Board Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) NASA (National Aeronautics and Space Administration)	$5,724,442	0.3%	Rank history: not on the FY2022 list, #44 in FY2023, #100 in FY2024 and not on the FY2025 list; up 32 since FY2020.
37	Global Technology and Management Resources, Inc. Top agencies Navy (Department of the Navy)	$5,231,414	0.3%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
38	The Charles Stark Draper Laboratory, Inc. Top agencies USAF (Department of the Air Force)	$5,182,991	0.3%	Rank history: #37 in FY2022, #43 in FY2023, #48 in FY2024 and #40 in FY2025; new, not ranked in FY2020.
39	Centerpoint Energy, Inc. Through Energy Systems Group, LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$5,071,597	0.3%	Rank history: #51 in FY2022, #84 in FY2023 and not on the FY2024–FY2025 lists; up 34 since FY2020.
40	3D Systems Corporation 3 awardees Top agencies VA (Department of Veterans Affairs) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$5,054,464	0.3%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
41	General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy)	$4,674,692	0.3%	Rank history: #67 in FY2022, #36 in FY2023, #39 in FY2024 and not on the FY2025 list; down 14 since FY2020.
42	Eagle Systems Inc. Top agencies Navy (Department of the Navy)	$4,574,784	0.2%	Rank history: #47 in FY2022, #51 in FY2023, #62 in FY2024 and #54 in FY2025; up 7 since FY2020.
43	Blue Cardinal LLC Top agencies HHS (Department of Health and Human Services)	$4,495,008	0.2%	Rank history: #52 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
44	BMA Technical Services, Inc. Top agencies Army (Department of the Army)	$4,332,944	0.2%	Rank history: #87 in FY2022, #95 in FY2023, #89 in FY2024 and #78 in FY2025; down 16 since FY2020.
45	The Survice Engineering Company LLC Top agencies Army (Department of the Army)	$4,066,278	0.2%	Rank history: #69 in FY2022, #76 in FY2023, #80 in FY2024 and #89 in FY2025; up 1 since FY2020.
46	Skyquest Aviation LLC Top agencies USAF (Department of the Air Force)	$3,973,850	0.2%	Rank history: #55 in FY2022 and not on the FY2023–FY2025 lists; up 164 since FY2020.
47	Building Inspection Service, Inc. Top agencies DHS (Department of Homeland Security)	$3,959,971	0.2%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; up 284 since FY2020.
48	Johnson, Mirmiran & Thompson, Inc. Top agencies DOI (Department of the Interior)	$3,690,494	0.2%	Rank history: not on the FY2022–FY2025 lists; up 92 since FY2020.
49	System Dynamics International Incorporated Top agencies USAF (Department of the Air Force)	$3,572,737	0.2%	Rank history: #44 in FY2022, #52 in FY2023, #47 in FY2024 and not on the FY2025 list; down 4 since FY2020.
50	Dark Wolf Solutions, LLC Top agencies USAF (Department of the Air Force)	$3,545,278	0.2%	Rank history: #36 in FY2022, #26 in FY2023, #22 in FY2024 and #24 in FY2025; up 57 since FY2020.
51	Professionals HIR LLC Top agencies DHS (Department of Homeland Security)	$3,512,397	0.2%	Rank history: not on the FY2022–FY2025 lists; up 23 since FY2020.
52	Martinfederal Consulting, LLC Top agencies Army (Department of the Army)	$3,474,214	0.2%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
53	MYI Limited Top agencies EXIM (Export Import Bank of the US)	$3,225,000	0.2%	Rank history: #49 in FY2022, #60 in FY2023 and not on the FY2024–FY2025 lists; up 72 since FY2020.
54	Vista Defense Technologies, LLC Top agencies Army (Department of the Army)	$3,214,682	0.2%	Rank history: #63 in FY2022, #64 in FY2023, #66 in FY2024 and #57 in FY2025; new, not ranked in FY2020.
55	Favor Techconsulting, LLC Top agencies VA (Department of Veterans Affairs)	$3,195,599	0.2%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
56	The Kleinfelder Group, Inc. Through Kleinfelder Inc. Top agencies Army (Department of the Army)	$3,121,237	0.2%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
57	Mountain Horse LLC Top agencies DHS (Department of Homeland Security)	$3,083,190	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	SRS Battelle JV, LLC Top agencies Army (Department of the Army)	$2,921,741	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Sarai Services Group Inc. Top agencies Army (Department of the Army)	$2,774,430	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
60	Markon LLC Top agencies DOI (Department of the Interior)	$2,740,532	0.1%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
61	Hurtvet Subcontracting, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) DOI (Department of the Interior)	$2,713,576	0.1%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
62	J3 Consulting LLC Top agencies USDA (Department of Agriculture)	$2,607,769	0.1%	Rank history: not on the FY2022–FY2025 lists; up 48 since FY2020.
63	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies Navy (Department of the Navy)	$2,522,335	0.1%	Rank history: #84 in FY2022, not on the FY2023 list, #99 in FY2024 and #25 in FY2025; down 26 since FY2020.
64	Project Solutions, Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$2,517,786	0.1%	Rank history: not on the FY2022 list, #53 in FY2023, #58 in FY2024 and #33 in FY2025; up 52 since FY2020.
65	Jacobs Engineering Group Inc. 3 awardees, including Amentum Technology, Inc. and Ch2M Hill - HDR JV Top agencies EPA (Environmental Protection Agency) Army (Department of the Army)	$2,511,313	0.1%	Rank history: not on the FY2022–FY2025 lists; up 178 since FY2020.
66	AFG Group Inc. Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$2,455,348	0.1%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; up 14 since FY2020.
67	Simventions Inc. Top agencies Navy (Department of the Navy)	$2,450,982	0.1%	Rank history: not on the FY2022–FY2025 lists; down 10 since FY2020.
68	Level 3 Associates, LLC Top agencies Army (Department of the Army)	$2,399,863	0.1%	Rank history: not on the FY2022–FY2025 lists; up 32 since FY2020.
69	Alaska Testlab, LLC Top agencies Army (Department of the Army)	$2,309,552	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Apsi Construction Management Top agencies DOI (Department of the Interior) GSA (General Services Administration)	$2,283,649	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Aitheras LLC Top agencies FCC (Federal Communications Commission)	$2,234,849	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	CGI Federal Inc. Top agencies PBGC (Pension Benefit Guaranty Corporation)	$2,224,681	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Wisconsin State of 2 awardees, including State of Wisconsin Department of Health Services and Trade and Consumer Protection Wisconsin Department of Agriculture Top agencies HHS (Department of Health and Human Services)	$2,187,837	0.1%	Rank history: not on the FY2022–FY2025 lists; up 115 since FY2020.
74	R. S. Means Company LLC 7 awardees, including The Gordian Group, Inc., Pacific Scientific Energetic Materials Co California LLC and Landauer, Inc. Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$2,136,448	0.1%	Rank history: #100 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; up 197 since FY2020.
75	Four Points Technology, L.L.C. Top agencies VA (Department of Veterans Affairs) SBA (Small Business Administration) DOJ (Department of Justice)	$2,134,716	0.1%	Rank history: #54 in FY2022, #56 in FY2023, #63 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
76	Fultonst1 LLC Top agencies DLA (Defense Logistics Agency)	$2,102,843	0.1%	Rank history: not on the FY2022–FY2024 lists and #66 in FY2025; new, not ranked in FY2020.
77	Phigenics LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$2,092,181	0.1%	Rank history: #45 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; down 12 since FY2020.
78	Exponent Inc. Top agencies DHRA (Defense Human Resources Activity)	$2,045,390	0.1%	Rank history: #85 in FY2022 and not on the FY2023–FY2025 lists; up 12 since FY2020.
79	Tic Security, LLC Top agencies Treasury (Department of the Treasury) DOI (Department of the Interior)	$2,044,374	0.1%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
80	Alpha Construction and Engineering Corporation Top agencies DOI (Department of the Interior)	$1,955,282	0.1%	Rank history: not on the FY2022–FY2024 lists and #79 in FY2025; up 167 since FY2020.
81	Intertek Group PLC 5 awardees, including Intertek USA Inc., Intertek Testing Services NA, Inc. and Its Testing Services UK Ltd. Shj. BR. Top agencies USDA (Department of Agriculture) DLA (Defense Logistics Agency) EPA (Environmental Protection Agency)	$1,924,678	0.1%	Rank history: not on the FY2022 list, #78 in FY2023 and not on the FY2024–FY2025 lists; up 170 since FY2020.
82	Transportation North Carolina Department of 2 awardees, including North Carolina Department of Health & Human Services and North Carolina Department of Agriculture & Consumer Services Top agencies HHS (Department of Health and Human Services)	$1,894,638	0.1%	Rank history: #93 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
83	Smart Munitions Expert Solutions, Inc. Top agencies USAF (Department of the Air Force)	$1,894,366	0.1%	Rank history: #78 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
84	The Tatitlek Corporation Through Geonorth, LLC Top agencies Navy (Department of the Navy)	$1,866,298	0.1%	Rank history: not on the FY2022–FY2025 lists; down 40 since FY2020.
85	Rohmann Services, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$1,859,138	0.1%	Rank history: not on the FY2022–FY2025 lists; down 7 since FY2020.
86	FAF Developments LLC Top agencies USDA (Department of Agriculture)	$1,766,420	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	NA Alii Consulting & Sales LLC Top agencies WHS (DOD Washington Headquarters Service)	$1,757,085	0.1%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
88	Systems Engineering Inc. Top agencies MDA (DOD Missile Defense Agency)	$1,685,607	0.1%	Rank history: not on the FY2022–FY2025 lists; down 18 since FY2020.
89	Sigma Health Consulting, LLC Top agencies VA (Department of Veterans Affairs)	$1,666,283	0.1%	Rank history: not on the FY2022–FY2025 lists; up 3 since FY2020.
90	Media Plumbing & Heating Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force) Navy (Department of the Navy)	$1,663,323	0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
91	David Clark Company Incorporated Top agencies NASA (National Aeronautics and Space Administration)	$1,643,601	0.1%	Rank history: not on the FY2022–FY2025 lists; down 31 since FY2020.
92	Winergy LLC Top agencies VA (Department of Veterans Affairs)	$1,640,439	0.1%	Rank history: #86 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
93	Siemens Aktiengesellschaft 6 awardees, including Siemens Industry Inc., Siemens Government Technologies Inc. and Siemens Healthcare Diagnostics Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) Smithsonian (Smithsonian Institution)	$1,613,262	0.1%	Rank history: #82 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
94	Washington Dept of Public Inst 4 awardees, including Washington State Liquor and Cannabis Board, Washington State Department of Health and State of Washington Department of Agriculture Top agencies HHS (Department of Health and Human Services)	$1,599,061	0.1%	Rank history: not on the FY2022–FY2025 lists; up 187 since FY2020.
95	Texas State University System Through Texas State University Top agencies HHS (Department of Health and Human Services)	$1,570,795	0.1%	Rank history: #74 in FY2022, #77 in FY2023 and not on the FY2024–FY2025 lists; down 23 since FY2020.
96	Bluepath Labs LLC Top agencies DHS (Department of Homeland Security)	$1,560,518	0.1%	Rank history: not on the FY2022–FY2025 lists; up 71 since FY2020.
97	Optimum Low Voltage LLC Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce) DOI (Department of the Interior)	$1,524,880	0.1%	Rank history: not on the FY2022–FY2025 lists; up 26 since FY2020.
98	Nelbud Services LLC Top agencies WHS (DOD Washington Headquarters Service)	$1,515,580	0.1%	Rank history: not on the FY2022–FY2025 lists; up 74 since FY2020.
99	Corrections Colorado Department of 2 awardees, including Colorado Department of Public Health & Environment and Colorado Department of Agriculture Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation)	$1,512,680	0.1%	Rank history: not on the FY2022 list, #86 in FY2023 and not on the FY2024–FY2025 lists; down 22 since FY2020.
100	Ecolab Inc. 3 awardees, including Championx LLC Top agencies VA (Department of Veterans Affairs)	$1,510,899	0.1%	Rank history: not on the FY2022–FY2025 lists; up 62 since FY2020.

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100 of 2,503 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC H

Code	Net obligations	Largest contractor
H2 Equipment and Materials Testing	$725,602,857	RTX Corporation
H9 Other Quality, Test, Inspect Services	$473,650,392	RTX Corporation
H1 Quality Control Services	$437,016,618	Northrop Grumman Corporation
H3 Inspection Services	$96,594,147	Versar 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 $1.86 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.

Quick answers

Who were the top 10 PSC H contractors in FY2021?

1. RTX Corporation ($340M), 2. Northrop Grumman Corporation ($153M), 3. Reliance Test & Technology, LLC ($118M), 4. Vanguard Inspection Services ($103M), 5. Parsons Brinckerhoff Holdings Inc. ($80.3M), 6. L3Harris Technologies, Inc. ($64.1M), 7. Logistic Services International, Inc. ($56M), 8. Lockheed Martin Corporation ($44.1M), 9. Booz Allen Hamilton Holding Corporation ($35.2M), 10. Peckham Vocational Industries, Inc. ($27M).

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