Top 100 Contractors in PSC H: Quality Control, Test, Inspection, FY2024

Name: Top 100 Contractors in PSC H: Quality Control, Test, Inspection, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 52% of FY2024 PSC H contract dollars

Contract obligations: $2,177,891,321 Net of deobligations, by contracts coded PSC H or a code under it
Contractors: 2,597 Parent companies with an obligation
Largest contractor: GDC Middle East Company $414 million, 17.6% 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	GDC Middle East Company Top agencies Army (Department of the Army)	$413,682,264	17.6%	Rank history: not on the FY2021–FY2023 lists and #1 in FY2025; new.
2	RTX Corporation 20 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)	$151,396,947	6.4%	Rank history: #1 in FY2021, #5 in FY2022, #8 in FY2023 and #2 in FY2025; up 6 since FY2023.
3	Reliance Test & Technology, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$135,009,315	5.7%	Rank history: #3 in FY2021, #3 in FY2022, #4 in FY2023 and #4 in FY2025; up 1 since FY2023.
4	L3Harris Technologies, Inc. 6 awardees, including L3Harris Interstate Electronics Corporation, L3 Technologies, Inc. and Stellant Systems Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$130,084,483	5.5%	Rank history: #6 in FY2021, #2 in FY2022, #2 in FY2023 and #3 in FY2025; down 2 since FY2023.
5	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies USAF (Department of the Air Force)	$120,133,807	5.1%	Rank history: #9 in FY2021, #6 in FY2022, #6 in FY2023 and #21 in FY2025; up 1 since FY2023.
6	Golder Europe Service Centre SRL 2 awardees, including WSP USA Services Inc. Top agencies DHS (Department of Homeland Security)	$66,396,826	2.8%	Rank history: not on the FY2021–FY2023 lists and #10 in FY2025; new.
7	Veritas Capital Fund Management, L.L.C. Through Analex Corporation Top agencies Navy (Department of the Navy)	$59,823,799	2.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
8	The Boeing Company 5 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$56,380,616	2.4%	Rank history: #12 in FY2021, #12 in FY2022, #12 in FY2023 and #52 in FY2025; up 4 since FY2023.
9	Rocket Lab National Security LLC Top agencies OSD (Office of the Secretary of Defense)	$42,359,240	1.8%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2023 and #50 in FY2025; up 19 since FY2023.
10	Northrop Grumman Corporation 7 awardees, including Northrop Grumman Systems Corporation and Vinnell Arabia, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$40,212,910	1.7%	Rank history: #2 in FY2021, #1 in FY2022, #1 in FY2023 and #11 in FY2025; down 9 since FY2023.
11	Peckham Vocational Industries Inc. 2 awardees Top agencies Army (Department of the Army)	$37,635,826	1.6%	Rank history: #10 in FY2021, #11 in FY2022, #13 in FY2023 and #7 in FY2025; up 2 since FY2023.
12	Hermeus Corp Top agencies OSD (Office of the Secretary of Defense)	$36,023,000	1.5%	Rank history: not on the FY2021–FY2023 lists and #29 in FY2025; new.
13	Vanguard Inspection Services Top agencies DHS (Department of Homeland Security)	$30,053,530	1.3%	Rank history: #4 in FY2021, #7 in FY2022, #7 in FY2023 and #8 in FY2025; down 6 since FY2023.
14	Trax International Corporation Top agencies Army (Department of the Army)	$27,896,000	1.2%	Rank history: not on the FY2021–FY2023 lists and #13 in FY2025; new.
15	Jll-Rer Solutions, LLC Top agencies Army (Department of the Army)	$27,028,346	1.1%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023 and not on the FY2025 list; down 4 since FY2023.
16	Lockheed Martin Corporation 8 awardees, including Lockheed Martin Coherent Technologies, Inc. Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency) Navy (Department of the Navy)	$26,487,558	1.1%	Rank history: #8 in FY2021, #4 in FY2022, #3 in FY2023 and #5 in FY2025; down 13 since FY2023.
17	Applied Research Associates, Inc. Top agencies DTRA (Defense Threat Reduction Agency) DOT (Department of Transportation)	$24,599,305	1.0%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2023 and #12 in FY2025; up 7 since FY2023.
18	The Bionetics Corporation Top agencies USAF (Department of the Air Force) DOI (Department of the Interior)	$22,872,313	1.0%	Rank history: #14 in FY2021, #14 in FY2022, #17 in FY2023 and #17 in FY2025; down 1 since FY2023.
19	Parsons Corporation Through Parsons Government Services Inc. Top agencies DTRA (Defense Threat Reduction Agency) DOS (Department of State)	$21,766,259	0.9%	Rank history: not on the FY2021–FY2022 lists, #19 in FY2023 and #14 in FY2025; unchanged since FY2023.
20	Man-Machine Systems Assessment (Msa), Incorporated Top agencies Army (Department of the Army)	$18,790,462	0.8%	Rank history: #24 in FY2021, #16 in FY2022, #20 in FY2023 and #18 in FY2025; unchanged since FY2023.
21	Ensco Inc. Top agencies DOT (Department of Transportation) DOE (Department of Energy)	$16,874,316	0.7%	Rank history: not on the FY2021 list, #70 in FY2022, #18 in FY2023 and #19 in FY2025; down 3 since FY2023.
22	Dark Wolf Solutions, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$14,977,433	0.6%	Rank history: #50 in FY2021, #36 in FY2022, #26 in FY2023 and #24 in FY2025; up 4 since FY2023.
23	General Dynamics Corporation 4 awardees, including General Dynamics Information Technology, Inc., General Dynamics Mission Systems, Inc. and General Dynamics Ordnance & Tactical Systems, Inc. Top agencies Navy (Department of the Navy)	$14,860,697	0.6%	Rank history: #22 in FY2021, #23 in FY2022, #27 in FY2023 and #15 in FY2025; up 4 since FY2023.
24	Amentum Services, Inc. Top agencies DHS (Department of Homeland Security)	$12,269,388	0.5%	Rank history: #35 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
25	Atlas Technologies Inc. Top agencies Navy (Department of the Navy)	$11,923,503	0.5%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2025; new.
26	Predictant, LLC Top agencies USAF (Department of the Air Force)	$11,033,257	0.5%	Rank history: #31 in FY2021, #17 in FY2022, #23 in FY2023 and not on the FY2025 list; down 3 since FY2023.
27	Eospace Inc. Top agencies MDA (DOD Missile Defense Agency)	$10,500,000	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
28	Parsons Government Services Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$9,801,103	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
29	Tyonek Global Services LLC Top agencies Army (Department of the Army)	$9,670,000	0.4%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2025; new.
30	Joint Research and Development LLC Top agencies Army (Department of the Army)	$8,615,016	0.4%	Rank history: #32 in FY2021, #34 in FY2022, #33 in FY2023 and #46 in FY2025; up 3 since FY2023.
31	Johnson Controls Security Solutions LLC 2 awardees, including Johnson Controls Government Systems, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$8,574,289	0.4%	Rank history: #11 in FY2021, #10 in FY2022, #16 in FY2023 and not on the FY2025 list; down 15 since FY2023.
32	Sossec Inc. Top agencies USAF (Department of the Air Force)	$8,545,251	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
33	Tyonek Services Overhaul Facility - Stennis LLC Through Tyonek Global Services LLC Top agencies Army (Department of the Army)	$7,900,000	0.3%	Rank history: not on the FY2021 list, #53 in FY2022, #14 in FY2023 and not on the FY2025 list; down 19 since FY2023.
34	Linde LLC Through Linde Special Projects LLC Top agencies USAF (Department of the Air Force)	$7,877,483	0.3%	Rank history: #33 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 288 since FY2023.
35	Valiant Global Defense Services Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$7,873,328	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
36	Air Company Holdings, Inc. Top agencies OSD (Office of the Secretary of Defense)	$7,555,614	0.3%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2023 and #73 in FY2025; up 21 since FY2023.
37	Siemens Industry Inc. Top agencies Smithsonian (Smithsonian Institution) Army (Department of the Army) VA (Department of Veterans Affairs)	$7,423,276	0.3%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2025; new.
38	Global Technology and Management Resources Inc. Top agencies Navy (Department of the Navy)	$7,412,174	0.3%	Rank history: not on the FY2021 list, #41 in FY2022, #37 in FY2023 and #35 in FY2025; down 1 since FY2023.
39	General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy)	$6,971,106	0.3%	Rank history: #41 in FY2021, #67 in FY2022, #36 in FY2023 and not on the FY2025 list; down 3 since FY2023.
40	Scientia Global, Inc. Top agencies Army (Department of the Army)	$6,955,100	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
41	Versar, Inc. 3 awardees Top agencies Army (Department of the Army)	$6,593,466	0.3%	Rank history: #26 in FY2021, #28 in FY2022, #46 in FY2023 and not on the FY2025 list; up 5 since FY2023.
42	Accura Engineering and Consulting Services, Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$6,397,448	0.3%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2023 and #60 in FY2025; up 6 since FY2023.
43	Innoveering LLC Top agencies OSD (Office of the Secretary of Defense)	$6,299,160	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 400 since FY2023.
44	Procon Consulting LLC Top agencies NASA (National Aeronautics and Space Administration) DOI (Department of the Interior)	$6,207,612	0.3%	Rank history: not on the FY2021 list, #60 in FY2022, #39 in FY2023 and #41 in FY2025; down 5 since FY2023.
45	Dynetics, Inc. Top agencies USAF (Department of the Air Force)	$6,000,000	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
46	Tribal One Technology, LLC Top agencies USDA (Department of Agriculture)	$5,932,320	0.3%	Rank history: not on the FY2021–FY2022 lists, #49 in FY2023 and #37 in FY2025; up 3 since FY2023.
47	System Dynamics International Incorporated Top agencies USAF (Department of the Air Force)	$5,472,674	0.2%	Rank history: #49 in FY2021, #44 in FY2022, #52 in FY2023 and not on the FY2025 list; up 5 since FY2023.
48	The Charles Stark Draper Laboratory, Inc. Top agencies USAF (Department of the Air Force)	$5,425,874	0.2%	Rank history: #38 in FY2021, #37 in FY2022, #43 in FY2023 and #40 in FY2025; down 5 since FY2023.
49	Crawford Consulting Services, Inc. 2 awardees Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$5,074,718	0.2%	Rank history: not on the FY2021–FY2023 lists and #30 in FY2025; up 182 since FY2023.
50	Simpson Gumpertz & Heger Inc. Top agencies USAF (Department of the Air Force)	$5,042,196	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
51	CAE USA Inc. Top agencies USAF (Department of the Air Force)	$5,035,480	0.2%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; new.
52	Sierra Nevada Company, LLC 3 awardees Top agencies USAF (Department of the Air Force)	$4,997,072	0.2%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2025; new.
53	The Pennsylvania State University Top agencies Navy (Department of the Navy)	$4,792,381	0.2%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2023 and #88 in FY2025; up 17 since FY2023.
54	Johnson Controls Inc 2 awardees, including Johnson Controls Fire Protection LP Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) DOJ (Department of Justice)	$4,544,425	0.2%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2025; new.
55	Stoke Space Technologies, Inc. Top agencies OSD (Office of the Secretary of Defense)	$4,500,000	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
56	Parsons Brinckerhoff Holdings Inc. Through WSP USA Services Inc. Top agencies DHS (Department of Homeland Security)	$4,298,373	0.2%	Rank history: #5 in FY2021, #9 in FY2022, #79 in FY2023 and not on the FY2025 list; up 23 since FY2023.
57	Solutions Through Innovative Technologies Inc. Top agencies USAF (Department of the Air Force)	$4,187,883	0.2%	Rank history: not on the FY2021 list, #95 in FY2022, #73 in FY2023 and #75 in FY2025; up 16 since FY2023.
58	Project Solutions, Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture) Army (Department of the Army)	$4,185,714	0.2%	Rank history: #64 in FY2021, not on the FY2022 list, #53 in FY2023 and #33 in FY2025; down 5 since FY2023.
59	Honeywell International Inc. 2 awardees Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$4,136,857	0.2%	Rank history: #20 in FY2021, #22 in FY2022, #21 in FY2023 and #38 in FY2025; down 38 since FY2023.
60	Next Generation Logistics, LLC Top agencies Army (Department of the Army)	$4,007,854	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 119 since FY2023.
61	KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$3,966,278	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
62	Eagle Systems Inc. Top agencies Navy (Department of the Navy)	$3,908,801	0.2%	Rank history: #42 in FY2021, #47 in FY2022, #51 in FY2023 and #54 in FY2025; down 11 since FY2023.
63	Four Points Technology, L.L.C. Top agencies VA (Department of Veterans Affairs) SBA (Small Business Administration)	$3,769,367	0.2%	Rank history: #75 in FY2021, #54 in FY2022, #56 in FY2023 and not on the FY2025 list; down 7 since FY2023.
64	Elektro Noack GMBH Top agencies DOS (Department of State)	$3,726,555	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 271 since FY2023.
65	Korea Electric Power Jeonuhoe Through JW Business Company Top agencies Army (Department of the Army)	$3,535,136	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
66	Vista Defense Technologies, LLC Top agencies DHA (Defense Health Agency)	$3,507,697	0.1%	Rank history: #54 in FY2021, #63 in FY2022, #64 in FY2023 and #57 in FY2025; down 2 since FY2023.
67	Red Six Solutions, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$3,459,341	0.1%	Rank history: not on the FY2021–FY2022 lists, #85 in FY2023 and not on the FY2025 list; up 18 since FY2023.
68	Puretech Systems Inc. Top agencies DOT (Department of Transportation)	$3,454,466	0.1%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and not on the FY2025 list; up 32 since FY2023.
69	Computer Evidence Specialists, LLC Top agencies HHS (Department of Health and Human Services)	$3,381,752	0.1%	Rank history: not on the FY2021 list, #31 in FY2022, not on the FY2023 list and #43 in FY2025; up 78 since FY2023.
70	K. Parks Consulting, Inc. Top agencies HHS (Department of Health and Human Services)	$3,217,392	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 65 since FY2023.
71	L3HARRIS Aviation Products Inc Through L3 Technologies, Inc. Top agencies Navy (Department of the Navy)	$3,195,673	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
72	Cherokee Nation Operational Solutions, L.L.C. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy)	$3,050,216	0.1%	Rank history: not on the FY2021 list, #33 in FY2022, #29 in FY2023 and #47 in FY2025; down 43 since FY2023.
73	Nemean Solutions LLC Top agencies DHS (Department of Homeland Security)	$3,049,727	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
74	Tetra TECH Railai Inc. Top agencies DOT (Department of Transportation)	$2,882,867	0.1%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023 and #63 in FY2025; down 3 since FY2023.
75	Sunshine Aero Industries, Incorporated Top agencies USAF (Department of the Air Force)	$2,877,589	0.1%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2025; new.
76	Jung Research and Development Corp Top agencies MDA (DOD Missile Defense Agency)	$2,743,239	0.1%	Rank history: not on the FY2021 list, #92 in FY2022, #89 in FY2023 and not on the FY2025 list; up 13 since FY2023.
77	G 2 Software Systems Inc. Top agencies Navy (Department of the Navy)	$2,733,649	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 117 since FY2023.
78	Spaceport Authority Inc. Top agencies OSD (Office of the Secretary of Defense)	$2,684,237	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
79	Professionals HIR LLC Top agencies DHS (Department of Homeland Security)	$2,484,775	0.1%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and not on the FY2025 list; up 1 since FY2023.
80	The Survice Engineering Company LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$2,469,344	0.1%	Rank history: #45 in FY2021, #69 in FY2022, #76 in FY2023 and #89 in FY2025; down 4 since FY2023.
81	Interspec, LLC Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) DHS (Department of Homeland Security)	$2,441,668	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 157 since FY2023.
82	Solid Blend Technologies, Inc. Top agencies VA (Department of Veterans Affairs)	$2,431,011	0.1%	Rank history: not on the FY2021–FY2023 lists and #95 in FY2025; new.
83	AECOM 2 awardees, including AECOM Technical Services, Inc. and AECOM Usa, Inc. Top agencies Army (Department of the Army)	$2,416,454	0.1%	Rank history: #21 in FY2021, #26 in FY2022, #40 in FY2023 and not on the FY2025 list; down 43 since FY2023.
84	Aviate Enterprises, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$2,351,880	0.1%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2025; up 186 since FY2023.
85	Colorado Department of Public Health & Environment Top agencies HHS (Department of Health and Human Services)	$2,258,775	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
86	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)	$2,233,168	0.1%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2023 and not on the FY2025 list; up 13 since FY2023.
87	GA Mechanical Inc. Top agencies Army (Department of the Army)	$2,224,126	0.1%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #80 in FY2025; down 6 since FY2023.
88	Kbr, Inc. Through KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$2,191,685	0.1%	Rank history: #25 in FY2021, #25 in FY2022, #25 in FY2023 and not on the FY2025 list; down 63 since FY2023.
89	BMA Technical Services, Inc. Top agencies Army (Department of the Army)	$2,191,000	0.1%	Rank history: #44 in FY2021, #87 in FY2022, #95 in FY2023 and #78 in FY2025; up 6 since FY2023.
90	Institute for Environmental Health Inc. Top agencies USDA (Department of Agriculture)	$2,165,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and not on the FY2025 list; unchanged since FY2023.
91	New Jersey Department of Health Top agencies HHS (Department of Health and Human Services)	$2,159,450	0.1%	Rank history: not on the FY2021–FY2023 lists and #72 in FY2025; new.
92	Johnson Controls Industries Through Johnson Controls, Inc. Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$2,074,609	0.1%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2023 and not on the FY2025 list; down 33 since FY2023.
93	Unified Business Technologies, Inc. Top agencies DOI (Department of the Interior)	$2,065,959	0.1%	Rank history: not on the FY2021 list, #77 in FY2022, not on the FY2023 list and not on the FY2025 list; up 9 since FY2023.
94	Astra Space Operations, LLC Top agencies OSD (Office of the Secretary of Defense)	$2,007,892	0.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2025; new.
95	Agilent Technologies, Inc. Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) DOI (Department of the Interior)	$2,000,007	0.1%	Rank history: not on the FY2021–FY2023 lists and #81 in FY2025; new.
96	Science Applications International Corporation Top agencies Navy (Department of the Navy)	$1,979,126	0.1%	Rank history: not on the FY2021–FY2023 lists and #36 in FY2025; new.
97	Food Safety Net Services, Ltd. Top agencies USDA (Department of Agriculture)	$1,939,390	0.1%	Rank history: not on the FY2021 list, #99 in FY2022, not on the FY2023 list and not on the FY2025 list; up 11 since FY2023.
98	Technology Management & Budget Department of 3 awardees, including Michigan Department of Health and Human Services and Michigan Department of Labor and Economic Opportunity Top agencies HHS (Department of Health and Human Services)	$1,935,548	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #68 in FY2023 and not on the FY2025 list; down 30 since FY2023.
99	Leidos Holdings, Inc. 5 awardees, including Leidos, Inc. Top agencies Navy (Department of the Navy)	$1,932,072	0.1%	Rank history: #63 in FY2021, #84 in FY2022, not on the FY2023 list and #25 in FY2025; up 31 since FY2023.
100	State of California Controllers Office Through California Department of Public Health Top agencies HHS (Department of Health and Human Services)	$1,931,645	0.1%	Rank history: #36 in FY2021, not on the FY2022 list, #44 in FY2023 and not on the FY2025 list; down 56 since FY2023.

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100 of 2,597 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	$848,600,164	Reliance Test & Technology, LLC
H1 Quality Control Services	$711,393,783	GDC Middle East Company
H9 Other Quality, Test, Inspect Services	$468,592,553	L3Harris Technologies, Inc.
H3 Inspection Services	$149,304,821	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 $2.35 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 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 FY2024?

1. GDC Middle East Company ($414M), 2. RTX Corporation ($151M), 3. Reliance Test & Technology, LLC ($135M), 4. L3Harris Technologies, Inc. ($130M), 5. Booz Allen Hamilton Holding Corporation ($120M), 6. Golder Europe Service Centre SRL ($66.4M), 7. Veritas Capital Fund Management, L.L.C. ($59.8M), 8. The Boeing Company ($56.4M), 9. Rocket Lab National Security LLC ($42.4M), 10. Northrop Grumman Corporation ($40.2M).

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