Top 100 Contractors in PSC H: Quality Control, Test, Inspection, FY2023

Name: Top 100 Contractors in PSC H: Quality Control, Test, Inspection, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 48% of FY2023 PSC H contract dollars

Contract obligations: $2,016,437,223 Net of deobligations, by contracts coded PSC H or a code under it
Contractors: 2,494 Parent companies with an obligation
Largest contractor: Northrop Grumman Corporation $249 million, 11.3% 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	Northrop Grumman Corporation 6 awardees, including Northrop Grumman Systems Corporation and Vinnell Arabia, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$248,750,120	11.3%	Rank history: #2 in FY2021, #1 in FY2022, #10 in FY2024 and #11 in FY2025; unchanged since FY2022.
2	L3Harris Technologies, Inc. 7 awardees, including L3 Technologies, Inc., L3Harris Interstate Electronics Corporation and Stellant Systems Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Smithsonian (Smithsonian Institution)	$156,358,123	7.1%	Rank history: #6 in FY2021, #2 in FY2022, #4 in FY2024 and #3 in FY2025; unchanged since FY2022.
3	Lockheed Martin Corporation 10 awardees, including Lockheed Martin Coherent Technologies, Inc. and Sikorsky Aircraft Corporation Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army) USAF (Department of the Air Force)	$130,892,430	6.0%	Rank history: #8 in FY2021, #4 in FY2022, #16 in FY2024 and #5 in FY2025; up 1 since FY2022.
4	Reliance Test & Technology, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$127,230,546	5.8%	Rank history: #3 in FY2021, #3 in FY2022, #3 in FY2024 and #4 in FY2025; down 1 since FY2022.
5	Danaher Corporation 5 awardees, including Global Life Sciences Solutions USA LLC, AB Sciex LLC and Hach Company Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation) VA (Department of Veterans Affairs)	$92,289,364	4.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
6	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies USAF (Department of the Air Force)	$86,175,047	3.9%	Rank history: #9 in FY2021, #6 in FY2022, #5 in FY2024 and #21 in FY2025; unchanged since FY2022.
7	Vanguard Inspection Services Top agencies DHS (Department of Homeland Security)	$79,214,960	3.6%	Rank history: #4 in FY2021, #7 in FY2022, #13 in FY2024 and #8 in FY2025; unchanged since FY2022.
8	RTX Corporation 16 awardees, including Raytheon Company, Rockwell Collins, Inc. and Goodrich Corporation Top agencies MDA (DOD Missile Defense Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$54,297,354	2.5%	Rank history: #1 in FY2021, #5 in FY2022, #2 in FY2024 and #2 in FY2025; down 3 since FY2022.
9	National Collegiate Inventors & Innovators Alliance, Inc. Top agencies HHS (Department of Health and Human Services)	$45,688,704	2.1%	Rank history: #17 in FY2021, #8 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
10	WSP USA Services Inc. Top agencies DHS (Department of Homeland Security)	$36,322,597	1.7%	Rank history: not on the FY2021 list, #20 in FY2022 and not on the FY2024–FY2025 lists; up 10 since FY2022.
11	Jll-Rer Solutions, LLC Top agencies Army (Department of the Army)	$31,309,315	1.4%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2024 and not on the FY2025 list; new.
12	The Boeing Company 6 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$28,318,854	1.3%	Rank history: #12 in FY2021, #12 in FY2022, #8 in FY2024 and #52 in FY2025; unchanged since FY2022.
13	Peckham Vocational Industries, Inc. Top agencies Army (Department of the Army)	$22,322,478	1.0%	Rank history: #10 in FY2021, #11 in FY2022, #11 in FY2024 and #7 in FY2025; down 2 since FY2022.
14	Tyonek Services Overhaul Facility - Stennis LLC 2 awardees, including Tyonek Global Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$20,937,500	1.0%	Rank history: not on the FY2021 list, #53 in FY2022, #33 in FY2024 and not on the FY2025 list; up 39 since FY2022.
15	The Whiskey Project Group Ltd Top agencies OSD (Office of the Secretary of Defense)	$20,495,800	0.9%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #27 in FY2025; new.
16	Johnson Controls Security Solutions LLC 9 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) Navy (Department of the Navy)	$19,787,473	0.9%	Rank history: #11 in FY2021, #10 in FY2022, #31 in FY2024 and not on the FY2025 list; down 6 since FY2022.
17	The Bionetics Corporation 2 awardees Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$19,733,859	0.9%	Rank history: #14 in FY2021, #14 in FY2022, #18 in FY2024 and #17 in FY2025; down 3 since FY2022.
18	Ensco Inc. Top agencies DOT (Department of Transportation) DOE (Department of Energy)	$19,199,123	0.9%	Rank history: not on the FY2021 list, #70 in FY2022, #21 in FY2024 and #19 in FY2025; up 52 since FY2022.
19	Parsons Corporation Through Parsons Government Services Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$17,972,741	0.8%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2024 and #14 in FY2025; new.
20	Man-Machine Systems Assessment (Msa), Incorporated Top agencies Army (Department of the Army)	$16,384,673	0.7%	Rank history: #24 in FY2021, #16 in FY2022, #20 in FY2024 and #18 in FY2025; down 4 since FY2022.
21	Honeywell International Inc. 7 awardees, including Vindicator Technologies, Inc. and Honeywell Analytics Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOT (Department of Transportation)	$15,448,122	0.7%	Rank history: #20 in FY2021, #22 in FY2022, #59 in FY2024 and #38 in FY2025; up 1 since FY2022.
22	Sparksoft Corporation Top agencies HHS (Department of Health and Human Services)	$14,767,362	0.7%	Rank history: #30 in FY2021, #21 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
23	Predictant, LLC Top agencies USAF (Department of the Air Force)	$14,502,497	0.7%	Rank history: #31 in FY2021, #17 in FY2022, #26 in FY2024 and not on the FY2025 list; down 6 since FY2022.
24	Applied Research Associates, Inc. Top agencies DTRA (Defense Threat Reduction Agency) DOT (Department of Transportation)	$13,711,407	0.6%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2024 and #12 in FY2025; up 151 since FY2022.
25	Kbr, Inc. 2 awardees, including KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$13,156,297	0.6%	Rank history: #25 in FY2021, #25 in FY2022, #88 in FY2024 and not on the FY2025 list; unchanged since FY2022.
26	Dark Wolf Solutions, LLC Top agencies USAF (Department of the Air Force)	$13,004,523	0.6%	Rank history: #50 in FY2021, #36 in FY2022, #22 in FY2024 and #24 in FY2025; up 10 since FY2022.
27	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. Top agencies Navy (Department of the Navy)	$12,912,083	0.6%	Rank history: #22 in FY2021, #23 in FY2022, #23 in FY2024 and #15 in FY2025; down 4 since FY2022.
28	Rocket Lab National Security LLC Top agencies OSD (Office of the Secretary of Defense)	$12,266,240	0.6%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2024 and #50 in FY2025; new.
29	Cherokee Nation Operational Solutions, L.L.C. Top agencies Navy (Department of the Navy) DHA (Defense Health Agency)	$11,213,505	0.5%	Rank history: not on the FY2021 list, #33 in FY2022, #72 in FY2024 and #47 in FY2025; up 4 since FY2022.
30	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$9,881,923	0.5%	Rank history: #15 in FY2021, #13 in FY2022 and not on the FY2024–FY2025 lists; down 17 since FY2022.
31	PPI Technical Services LLC Top agencies USAF (Department of the Air Force)	$8,612,398	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Hypersonix Launch Systems Ltd Top agencies OSD (Office of the Secretary of Defense)	$8,500,000	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
33	Joint Research and Development LLC Top agencies Army (Department of the Army)	$8,456,270	0.4%	Rank history: #32 in FY2021, #34 in FY2022, #30 in FY2024 and #46 in FY2025; up 1 since FY2022.
34	Linde Special Projects LLC Top agencies USAF (Department of the Air Force)	$7,647,772	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #32 in FY2025; new.
35	Swiftships, LLC Top agencies OSD (Office of the Secretary of Defense)	$7,499,990	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
36	General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy)	$7,452,894	0.3%	Rank history: #41 in FY2021, #67 in FY2022, #39 in FY2024 and not on the FY2025 list; up 31 since FY2022.
37	Global Technology and Management Resources Inc. Top agencies Navy (Department of the Navy)	$7,203,526	0.3%	Rank history: not on the FY2021 list, #41 in FY2022, #38 in FY2024 and #35 in FY2025; up 4 since FY2022.
38	Atlas Technologies, Inc. Top agencies Navy (Department of the Navy)	$6,812,907	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
39	Procon Consulting LLC Top agencies DOI (Department of the Interior) NASA (National Aeronautics and Space Administration)	$6,719,856	0.3%	Rank history: not on the FY2021 list, #60 in FY2022, #44 in FY2024 and #41 in FY2025; up 21 since FY2022.
40	AECOM 2 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)	$6,340,620	0.3%	Rank history: #21 in FY2021, #26 in FY2022, #83 in FY2024 and not on the FY2025 list; down 14 since FY2022.
41	Nova Global Supply and Services LLC Through Valiant Global Defense Services Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$6,178,962	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	Rmgs Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$5,893,866	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
43	The Charles Stark Draper Laboratory, Inc. Top agencies USAF (Department of the Air Force)	$5,840,066	0.3%	Rank history: #38 in FY2021, #37 in FY2022, #48 in FY2024 and #40 in FY2025; down 6 since FY2022.
44	State of California Controllers Office 3 awardees, including California Department of Public Health, California State University, Maritime Academy and State of California Department of Water Resources Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation) VA (Department of Veterans Affairs)	$5,721,909	0.3%	Rank history: #36 in FY2021, not on the FY2022 list, #100 in FY2024 and not on the FY2025 list; up 135 since FY2022.
45	Smart Munitions Expert Solutions, Inc. Top agencies USAF (Department of the Air Force)	$5,587,872	0.3%	Rank history: #83 in FY2021, #78 in FY2022 and not on the FY2024–FY2025 lists; up 33 since FY2022.
46	Versar Inc. 3 awardees Top agencies Army (Department of the Army)	$5,580,037	0.3%	Rank history: #26 in FY2021, #28 in FY2022, #41 in FY2024 and not on the FY2025 list; down 18 since FY2022.
47	CAE Inc. Through CAE USA Inc. Top agencies USAF (Department of the Air Force)	$5,395,101	0.2%	Rank history: #34 in FY2021, #48 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
48	Accura Engineering and Consulting Services, Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$5,336,485	0.2%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2024 and #60 in FY2025; up 136 since FY2022.
49	Tribal One Technology, LLC Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force)	$5,299,112	0.2%	Rank history: not on the FY2021–FY2022 lists, #46 in FY2024 and #37 in FY2025; new.
50	National Security Technology Accelerator Inc. Top agencies Navy (Department of the Navy)	$5,273,631	0.2%	Rank history: #23 in FY2021, #43 in FY2022, not on the FY2024 list and #23 in FY2025; down 7 since FY2022.
51	Eagle Systems Inc. Top agencies Navy (Department of the Navy)	$5,141,512	0.2%	Rank history: #42 in FY2021, #47 in FY2022, #62 in FY2024 and #54 in FY2025; down 4 since FY2022.
52	System Dynamics International Incorporated Top agencies USAF (Department of the Air Force)	$5,077,397	0.2%	Rank history: #49 in FY2021, #44 in FY2022, #47 in FY2024 and not on the FY2025 list; down 8 since FY2022.
53	Project Solutions, Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$4,951,619	0.2%	Rank history: #64 in FY2021, not on the FY2022 list, #58 in FY2024 and #33 in FY2025; up 171 since FY2022.
54	Black & Veatch Special Projects Corp. Top agencies DTRA (Defense Threat Reduction Agency)	$4,916,804	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
55	Sierra Nevada Company, LLC 2 awardees Top agencies USAF (Department of the Air Force)	$4,884,901	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
56	Four Points Technology, L.L.C. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture) National Gallery of Art	$4,591,183	0.2%	Rank history: #75 in FY2021, #54 in FY2022, #63 in FY2024 and not on the FY2025 list; down 2 since FY2022.
57	Air Company Holdings, Inc. Top agencies OSD (Office of the Secretary of Defense)	$4,254,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2024 and #73 in FY2025; up 58 since FY2022.
58	Republic Mission Systems, Inc. Top agencies OSD (Office of the Secretary of Defense)	$4,232,043	0.2%	Rank history: not on the FY2021 list, #46 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
59	Johnson Controls Industries 4 awardees, including Johnson Controls, Inc., Johnson Controls S.P.A. and Johnson Controls Building Automation Systems, LLC Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) DOS (Department of State)	$4,211,292	0.2%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2024 and not on the FY2025 list; new.
60	MYI Limited Top agencies EXIM (Export Import Bank of the US)	$4,000,000	0.2%	Rank history: #53 in FY2021, #49 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
61	EMCOR Group, Inc. 2 awardees, including Mechanical Services of Central Florida, Inc. and Mesa Energy Systems, Inc. Top agencies DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$3,718,745	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
62	Edenred Commuter Benefit Solutions LLC Through Edenred Benefits LLC Top agencies Smithsonian (Smithsonian Institution)	$3,528,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
63	Psi Services LLC Through Performance Assessment Network, Inc. Top agencies DHS (Department of Homeland Security)	$3,518,608	0.2%	Rank history: #29 in FY2021, #32 in FY2022 and not on the FY2024–FY2025 lists; down 31 since FY2022.
64	Vista Defense Technologies, LLC Top agencies Army (Department of the Army)	$3,405,531	0.2%	Rank history: #54 in FY2021, #63 in FY2022, #66 in FY2024 and #57 in FY2025; down 1 since FY2022.
65	Phigenics LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$3,276,427	0.1%	Rank history: #77 in FY2021, #45 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
66	Watertight Solutions LLC Top agencies DOS (Department of State)	$3,115,975	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
67	Orbit Fab, Inc. Top agencies OSD (Office of the Secretary of Defense)	$3,050,000	0.1%	Rank history: not on the FY2021 list, #64 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
68	Technology Management & Budget Department of 3 awardees, including Michigan Department of Health and Human Services, Michigan Department of Agriculture and Rural Development and Michigan Department of Labor and Economic Opportunity Top agencies HHS (Department of Health and Human Services)	$2,910,234	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #98 in FY2024 and not on the FY2025 list; up 21 since FY2022.
69	R. S. Means Company LLC 7 awardees, including The Gordian Group, Inc., Censis Technologies, Inc. and Pacific Scientific Energetic Materials Company (California Llc) Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$2,849,484	0.1%	Rank history: #74 in FY2021, #100 in FY2022 and not on the FY2024–FY2025 lists; up 31 since FY2022.
70	The Pennsylvania State University Top agencies Navy (Department of the Navy)	$2,834,670	0.1%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2024 and #88 in FY2025; up 181 since FY2022.
71	Tetra TECH Railai Inc. Top agencies DOT (Department of Transportation)	$2,806,717	0.1%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2024 and #63 in FY2025; new.
72	The Building People LLC Top agencies GSA (General Services Administration) USDA (Department of Agriculture)	$2,744,929	0.1%	Rank history: not on the FY2021 list, #90 in FY2022 and not on the FY2024–FY2025 lists; up 18 since FY2022.
73	Solutions Through Innovative Technologies Inc. Top agencies USAF (Department of the Air Force)	$2,695,475	0.1%	Rank history: not on the FY2021 list, #95 in FY2022, #57 in FY2024 and #75 in FY2025; up 22 since FY2022.
74	Theodor Wille Intertrade GMBH Through Atlantic Diving Supply, Inc. Top agencies USAF (Department of the Air Force) DOS (Department of State)	$2,668,935	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
75	The Mitre Corporation Top agencies DHS (Department of Homeland Security)	$2,650,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	The Survice Engineering Company LLC Top agencies Army (Department of the Army)	$2,646,491	0.1%	Rank history: #45 in FY2021, #69 in FY2022, #80 in FY2024 and #89 in FY2025; down 7 since FY2022.
77	Texas State University System Through Texas State University Top agencies HHS (Department of Health and Human Services)	$2,588,877	0.1%	Rank history: #95 in FY2021, #74 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
78	Intertek Group PLC 5 awardees, including Intertek USA Inc., Intertek Testing Services NA, Inc. and Its Testing Services UK Ltd. Shj. BR. Top agencies DLA (Defense Logistics Agency) EPA (Environmental Protection Agency) VA (Department of Veterans Affairs)	$2,568,190	0.1%	Rank history: #81 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 80 since FY2022.
79	Parsons Brinckerhoff Holdings Inc. Through WSP USA Services Inc. Top agencies DHS (Department of Homeland Security)	$2,518,524	0.1%	Rank history: #5 in FY2021, #9 in FY2022, #56 in FY2024 and not on the FY2025 list; down 70 since FY2022.
80	Professionals HIR LLC Top agencies DHS (Department of Homeland Security)	$2,484,350	0.1%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2024 and not on the FY2025 list; new.
81	GA Mechanical Inc. Top agencies Army (Department of the Army)	$2,477,294	0.1%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2024 and #80 in FY2025; up 44 since FY2022.
82	State of New Jersey 3 awardees, including New Jersey Department of Health, New Jersey Department of Environmental Protection and New Jersey Department of Agriculture Top agencies HHS (Department of Health and Human Services)	$2,450,849	0.1%	Rank history: not on the FY2021 list, #72 in FY2022 and not on the FY2024–FY2025 lists; down 10 since FY2022.
83	Agilent Technologies, Inc. 2 awardees, including Agilent Technologies Japan, Ltd. Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation) DHS (Department of Homeland Security)	$2,419,155	0.1%	Rank history: not on the FY2021 list, #75 in FY2022 and not on the FY2024–FY2025 lists; down 8 since FY2022.
84	Centerpoint Energy, Inc. Through Energy Systems Group, LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$2,406,409	0.1%	Rank history: #39 in FY2021, #51 in FY2022 and not on the FY2024–FY2025 lists; down 33 since FY2022.
85	Red Six Solutions, LLC Top agencies Army (Department of the Army)	$2,390,611	0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2024 and not on the FY2025 list; new.
86	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) USDA (Department of Agriculture)	$2,386,025	0.1%	Rank history: #99 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 164 since FY2022.
87	Construction Support Solutions LLC Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior)	$2,312,505	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
88	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)	$2,302,788	0.1%	Rank history: #82 in FY2021, #93 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
89	Jung Research and Development Corp Top agencies MDA (DOD Missile Defense Agency)	$2,284,335	0.1%	Rank history: not on the FY2021 list, #92 in FY2022, #76 in FY2024 and not on the FY2025 list; up 3 since FY2022.
90	Institute for Environmental Health Inc. Top agencies USDA (Department of Agriculture)	$2,242,940	0.1%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2024 and not on the FY2025 list; up 167 since FY2022.
91	Nemean Trideum Joint Venture LLC Top agencies DHS (Department of Homeland Security)	$2,216,659	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 47 since FY2022.
92	Siemens Aktiengesellschaft 6 awardees, including Siemens Industry Inc., Siemens Medical Solutions Usa, Inc. and Siemens Government Technologies Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DOS (Department of State)	$2,198,663	0.1%	Rank history: #93 in FY2021, #82 in FY2022 and not on the FY2024–FY2025 lists; down 10 since FY2022.
93	Pennsylvania Commonwealth of 3 awardees, including Pennsylvania Department of Health, Pennsylvania Department of Environmental Protection and Department of Agriculture Pennsylvania Top agencies HHS (Department of Health and Human Services)	$2,178,674	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #67 in FY2025; up 88 since FY2022.
94	State of Illinois 3 awardees, including Illinois Department of Human Service, Department of Public Health Illinois and Illinois Department of Agriculture Top agencies HHS (Department of Health and Human Services)	$2,163,770	0.1%	Rank history: not on the FY2021 list, #88 in FY2022, not on the FY2024 list and #100 in FY2025; down 6 since FY2022.
95	BMA Technical Services, Inc. Top agencies Army (Department of the Army)	$2,049,923	0.1%	Rank history: #44 in FY2021, #87 in FY2022, #89 in FY2024 and #78 in FY2025; down 8 since FY2022.
96	Kratos Defense & Security Solutions, Inc. Through Kratos Sre, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$2,049,091	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
97	Winergy LLC Top agencies VA (Department of Veterans Affairs)	$2,045,504	0.1%	Rank history: #92 in FY2021, #86 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
98	Secretary of State Connecticut 4 awardees, including Mental Health & Addiction Services Conne, Dept of Energy & Environmental Protection and Consumer Protection Connecticut Department Top agencies HHS (Department of Health and Human Services)	$2,017,920	0.1%	Rank history: not on the FY2021 list, #98 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
99	Compagnie Merieux Alliance 2 awardees, including Silliker, Inc. and Biomerieux Inc. Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$2,009,827	0.1%	Rank history: not on the FY2021–FY2022 lists, #86 in FY2024 and not on the FY2025 list; up 123 since FY2022.
100	Puretech Systems Inc. Top agencies DOT (Department of Transportation)	$1,985,567	0.1%	Rank history: not on the FY2021–FY2022 lists, #68 in FY2024 and not on the FY2025 list; up 145 since FY2022.

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100 of 2,494 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	$814,974,908	Reliance Test & Technology, LLC
H9 Other Quality, Test, Inspect Services	$562,958,224	Danaher Corporation
H1 Quality Control Services	$482,591,105	Northrop Grumman Corporation
H3 Inspection Services	$155,912,987	Jll-Rer Solutions, LLC

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 $2.19 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.

Quick answers

Who were the top 10 PSC H contractors in FY2023?

1. Northrop Grumman Corporation ($249M), 2. L3Harris Technologies, Inc. ($156M), 3. Lockheed Martin Corporation ($131M), 4. Reliance Test & Technology, LLC ($127M), 5. Danaher Corporation ($92.3M), 6. Booz Allen Hamilton Holding Corporation ($86.2M), 7. Vanguard Inspection Services ($79.2M), 8. RTX Corporation ($54.3M), 9. National Collegiate Inventors & Innovators Alliance, Inc. ($45.7M), 10. WSP USA Services Inc. ($36.3M).

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