Top 100 Contractors in PSC L0: Technical Representative Services, FY2021

Name: Top 100 Contractors in PSC L0: Technical Representative Services, FY2021
Creator: GovTribe

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

The top 10 won 68% of FY2021 PSC L0 contract dollars

Contract obligations: $1,911,365,887 Net of deobligations, by contracts coded PSC L0 or a code under it
Contractors: 619 Parent companies with an obligation
Largest contractor: Northrop Grumman Corporation $302 million, 14.8% 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 11 awardees, including Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHS (Department of Homeland Security)	$301,639,891	14.8%	Rank history: #1 in FY2022, #1 in FY2023, #3 in FY2024 and #3 in FY2025; up 1 since FY2020.
2	The Boeing Company 8 awardees, including Insitu, Inc. and Boeing Aerospace Operations, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) USSOCOM (United States Special Operations Command)	$233,953,722	11.5%	Rank history: #4 in FY2022, #5 in FY2023, #4 in FY2024 and #5 in FY2025; down 1 since FY2020.
3	BAE Systems PLC 3 awardees, including BAE Systems Technology Solutions & Services Inc., BAE Systems Information and Electronic Systems Integration Inc. and BAE Systems Land & Armaments L.P. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$219,014,174	10.8%	Rank history: #2 in FY2022, #2 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
4	RTX Corporation 12 awardees, including Raytheon Company Top agencies MDA (DOD Missile Defense Agency) Army (Department of the Army) USAF (Department of the Air Force)	$148,686,398	7.3%	Rank history: #3 in FY2022, #4 in FY2023, #9 in FY2024 and #2 in FY2025; up 10 since FY2020.
5	Amentum Services, Inc. 3 awardees, including Dyncorp International LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$132,287,801	6.5%	Rank history: #14 in FY2022, #6 in FY2023, #6 in FY2024 and not on the FY2025 list; up 53 since FY2020.
6	Textron Inc. 3 awardees, including Textron Systems Corporation and Bell Textron Inc. Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command) Army (Department of the Army)	$92,159,251	4.5%	Rank history: #6 in FY2022, #8 in FY2023, #11 in FY2024 and #11 in FY2025; down 2 since FY2020.
7	Lockheed Martin Corporation 11 awardees, including Sikorsky Aircraft Corporation and Sikorsky Support Services Inc. Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency) USAF (Department of the Air Force)	$84,498,401	4.1%	Rank history: #5 in FY2022, #7 in FY2023, #5 in FY2024 and #6 in FY2025; down 2 since FY2020.
8	Kbr, Inc. 4 awardees, including KBR Wyle Services, LLC Top agencies DOI (Department of the Interior) Navy (Department of the Navy)	$60,705,816	3.0%	Rank history: #7 in FY2022, #9 in FY2023, #33 in FY2024 and not on the FY2025 list; up 11 since FY2020.
9	Scientific Research Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$54,122,417	2.7%	Rank history: #11 in FY2022, #12 in FY2023, #18 in FY2024 and #10 in FY2025; down 1 since FY2020.
10	BAE Systems Land & Armaments L.P. 3 awardees, including BAE Systems Technology Solutions & Services Inc. and BAE Systems Information and Electronic Systems Integration Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$53,564,183	2.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
11	Arcturus Uav, Inc. Top agencies USSOCOM (United States Special Operations Command)	$50,197,557	2.5%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
12	Aerovironment, Inc. Through Arcturus Uav, Inc. Top agencies USSOCOM (United States Special Operations Command)	$45,521,226	2.2%	Rank history: #9 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
13	Northrop Grumman Systems Corporation 2 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$37,948,203	1.9%	Rank history: #17 in FY2022, not on the FY2023 list, #10 in FY2024 and #12 in FY2025; down 7 since FY2020.
14	General Atomic Technologies Corporation 2 awardees, including General Atomics Aeronautical Systems, Inc. and General Atomics Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command) USAF (Department of the Air Force)	$33,878,469	1.7%	Rank history: not on the FY2022 list, #14 in FY2023, #27 in FY2024 and not on the FY2025 list; down 2 since FY2020.
15	General Dynamics Corporation 6 awardees, including Electric Boat Corporation, General Dynamics Mission Systems, Inc. and General Dynamics Information Technology, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$21,470,430	1.1%	Rank history: #15 in FY2022, #11 in FY2023, #16 in FY2024 and #15 in FY2025; down 2 since FY2020.
16	Government of Canada Through Canadian Commercial Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy)	$16,013,361	0.8%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
17	General Electric Company 4 awardees, including OEC Medical Systems, Inc. and GE Aviation Systems Limited Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$15,481,290	0.8%	Rank history: #29 in FY2022, #18 in FY2023, #23 in FY2024 and #30 in FY2025; up 11 since FY2020.
18	Centurum Inc. Through Centurum Information Technology Inc. Top agencies Navy (Department of the Navy)	$15,344,892	0.8%	Rank history: #23 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
19	Halvik LLC Top agencies Army (Department of the Army)	$10,742,105	0.5%	Rank history: #19 in FY2022, #17 in FY2023, #21 in FY2024 and #23 in FY2025; new, not ranked in FY2020.
20	Koniag, Inc. 2 awardees, including Digitized Schematic Solutions LLC Top agencies USAF (Department of the Air Force)	$9,919,617	0.5%	Rank history: #16 in FY2022, #19 in FY2023, #25 in FY2024 and not on the FY2025 list; up 55 since FY2020.
21	Riptide Software, Inc. Top agencies Navy (Department of the Navy)	$9,511,811	0.5%	Rank history: #41 in FY2022, #43 in FY2023, #67 in FY2024 and not on the FY2025 list; up 15 since FY2020.
22	Great Eastern Group, Inc. Top agencies Navy (Department of the Navy)	$8,764,379	0.4%	Rank history: #22 in FY2022, #23 in FY2023, #28 in FY2024 and #37 in FY2025; up 19 since FY2020.
23	Potawatomi Business Development Corp Through Advancia Technologies, LLC Top agencies Navy (Department of the Navy)	$8,526,616	0.4%	Rank history: #20 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
24	The Informatics Applications Group, Inc. Top agencies Navy (Department of the Navy)	$8,078,408	0.4%	Rank history: #25 in FY2022, #45 in FY2023, not on the FY2024 list and #54 in FY2025; up 5 since FY2020.
25	Synectic Solutions, Inc. Top agencies Navy (Department of the Navy)	$7,425,902	0.4%	Rank history: #26 in FY2022, #30 in FY2023, #37 in FY2024 and #33 in FY2025; up 8 since FY2020.
26	Katmai Health Services LLC Top agencies Navy (Department of the Navy)	$6,801,506	0.3%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
27	Serco North America (Holdings) Inc 2 awardees, including Brtrc Federal Solutions, Inc. and Serco Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$6,614,113	0.3%	Rank history: #12 in FY2022, #13 in FY2023 and not on the FY2024–FY2025 lists; up 47 since FY2020.
28	Systems Planning and Analysis, Inc. Top agencies Navy (Department of the Navy)	$6,578,287	0.3%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
29	Shoulder 2 Shoulder Inc. Top agencies USSOCOM (United States Special Operations Command) WHS (DOD Washington Headquarters Service) Army (Department of the Army)	$6,318,631	0.3%	Rank history: #42 in FY2022, #36 in FY2023, #43 in FY2024 and #49 in FY2025; up 19 since FY2020.
30	J Star Enterprises Inc. Top agencies Army (Department of the Army)	$6,255,788	0.3%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; up 93 since FY2020.
31	Insitu, Inc. Top agencies Navy (Department of the Navy)	$6,174,505	0.3%	Rank history: not on the FY2022–FY2025 lists; down 21 since FY2020.
32	Hatalom Corp Top agencies Navy (Department of the Navy)	$6,120,994	0.3%	Rank history: #24 in FY2022, #27 in FY2023, #35 in FY2024 and #41 in FY2025; new, not ranked in FY2020.
33	Technology Service Corp Top agencies USSOCOM (United States Special Operations Command)	$6,010,744	0.3%	Rank history: #10 in FY2022, #10 in FY2023, #13 in FY2024 and #14 in FY2025; new, not ranked in FY2020.
34	EPS Corporation Top agencies Army (Department of the Army)	$5,783,498	0.3%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
35	Compliance Corporation Top agencies Navy (Department of the Navy)	$5,636,522	0.3%	Rank history: #30 in FY2022, #32 in FY2023, #63 in FY2024 and not on the FY2025 list; up 2 since FY2020.
36	Management Services Group, Inc. Top agencies Navy (Department of the Navy) DOT (Department of Transportation)	$5,587,317	0.3%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; down 4 since FY2020.
37	L3Harris Technologies, Inc. 5 awardees, including L3Harris Maritime Services Inc., L3Harris Unmanned Systems, Inc. and L3 Technologies, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$5,576,527	0.3%	Rank history: #36 in FY2022, #44 in FY2023, #8 in FY2024 and #9 in FY2025; up 1 since FY2020.
38	Coastal Management Solutions Inc. Top agencies Navy (Department of the Navy)	$5,238,870	0.3%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
39	HP Enterprise Services LLC Through Peraton Inc. Top agencies Navy (Department of the Navy)	$5,071,266	0.2%	Rank history: #32 in FY2022, #37 in FY2023 and not on the FY2024–FY2025 lists; up 28 since FY2020.
40	The Remi Group LLC Top agencies HHS (Department of Health and Human Services)	$4,661,438	0.2%	Rank history: #34 in FY2022, #31 in FY2023, #71 in FY2024 and not on the FY2025 list; up 5 since FY2020.
41	Arlington Capital Partners IV, L.P. Through Tyto Government Solutions Inc. Top agencies Navy (Department of the Navy)	$4,646,258	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Trident Research, LLC Top agencies Navy (Department of the Navy)	$4,535,493	0.2%	Rank history: #92 in FY2022, #25 in FY2023, #55 in FY2024 and #48 in FY2025; down 7 since FY2020.
43	American Systems Corporation Top agencies Navy (Department of the Navy)	$4,050,000	0.2%	Rank history: #40 in FY2022, #39 in FY2023, #49 in FY2024 and #50 in FY2025; new, not ranked in FY2020.
44	JRC Integrated Systems, LLC Top agencies Navy (Department of the Navy)	$3,990,908	0.2%	Rank history: #38 in FY2022, #35 in FY2023, #46 in FY2024 and #39 in FY2025; up 41 since FY2020.
45	Skyquest Aviation LLC Top agencies DOJ (Department of Justice)	$3,431,889	0.2%	Rank history: #45 in FY2022, #55 in FY2023, not on the FY2024 list and #82 in FY2025; up 5 since FY2020.
46	DTG Aviation Inc. Top agencies DHS (Department of Homeland Security)	$3,372,424	0.2%	Rank history: #43 in FY2022, #41 in FY2023, #48 in FY2024 and not on the FY2025 list; up 1 since FY2020.
47	Adamo Construction Inc. Top agencies Navy (Department of the Navy)	$3,308,466	0.2%	Rank history: #51 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; up 143 since FY2020.
48	Katmai Integrated Solutions, LLC Top agencies Navy (Department of the Navy)	$3,231,516	0.2%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
49	Oshkosh Corp Through Oshkosh Defense LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$3,064,305	0.2%	Rank history: #97 in FY2022, #80 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
50	Airbus Americas Inc. Through Airbus Helicopters, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$2,992,221	0.1%	Rank history: #44 in FY2022, #51 in FY2023, #61 in FY2024 and not on the FY2025 list; up 149 since FY2020.
51	Textron Systems Corporation Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command)	$2,833,995	0.1%	Rank history: #21 in FY2022 and not on the FY2023–FY2025 lists; down 40 since FY2020.
52	Remington Arms Company LLC 2 awardees, including Dyncorp International LLC Top agencies Army (Department of the Army)	$2,702,556	0.1%	Rank history: not on the FY2022–FY2025 lists; down 30 since FY2020.
53	Dexis Interactive LLC Through Checchi and Company Consulting, Inc. Top agencies USAID (US Agency for International Development)	$2,685,849	0.1%	Rank history: #55 in FY2022, not on the FY2023 list, #60 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
54	Science Applications International Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$2,666,220	0.1%	Rank history: #52 in FY2022, #15 in FY2023, #14 in FY2024 and #8 in FY2025; up 1 since FY2020.
55	I-Mazing Solutions Inc. Top agencies Navy (Department of the Navy)	$2,546,936	0.1%	Rank history: #46 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
56	Life Cycle Engineering Inc. Top agencies Navy (Department of the Navy)	$2,530,348	0.1%	Rank history: #50 in FY2022, #57 in FY2023, #59 in FY2024 and #58 in FY2025; down 3 since FY2020.
57	Didlake Inc. Top agencies DOE (Department of Energy)	$2,485,902	0.1%	Rank history: #54 in FY2022, #46 in FY2023, #64 in FY2024 and #60 in FY2025; up 33 since FY2020.
58	Ka'ala Systems Technology Corporation Top agencies Navy (Department of the Navy)	$2,354,162	0.1%	Rank history: not on the FY2022–FY2025 lists; up 201 since FY2020.
59	Systems Application & Technologies Inc. 2 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy)	$2,098,700	0.1%	Rank history: not on the FY2022–FY2025 lists; down 32 since FY2020.
60	Evotech, LLC Top agencies DOT (Department of Transportation)	$2,004,636	0.1%	Rank history: #39 in FY2022, #38 in FY2023, #39 in FY2024 and #43 in FY2025; up 4 since FY2020.
61	Valkyrie Enterprises, LLC Top agencies Navy (Department of the Navy)	$2,000,088	0.1%	Rank history: #79 in FY2022, #60 in FY2023, #62 in FY2024 and #65 in FY2025; up 7 since FY2020.
62	Whitney Bradley & Brown, Inc. Through Brtrc Federal Solutions, Inc. Top agencies Army (Department of the Army)	$1,947,231	0.1%	Rank history: #31 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; down 44 since FY2020.
63	At&T Inc. 2 awardees, including At&T Enterprises, LLC and Att Mobility LLC Top agencies VA (Department of Veterans Affairs) USAID (US Agency for International Development)	$1,939,775	0.1%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; down 33 since FY2020.
64	Ducom, Incorporated Top agencies Army (Department of the Army)	$1,848,314	0.1%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; up 14 since FY2020.
65	Huntington Ingalls Industries, Inc. Through HII Fleet Support Group LLC Top agencies Navy (Department of the Navy)	$1,793,929	0.1%	Rank history: not on the FY2022–FY2024 lists and #73 in FY2025; down 8 since FY2020.
66	Lytx, Inc. Top agencies Navy (Department of the Navy)	$1,509,921	0.1%	Rank history: not on the FY2022–FY2025 lists; unchanged since FY2020.
67	CDW Corporation Through CDW Government LLC Top agencies USAID (US Agency for International Development)	$1,469,406	0.1%	Rank history: not on the FY2022–FY2025 lists; up 14 since FY2020.
68	The Survice Engineering Company LLC Top agencies Navy (Department of the Navy)	$1,468,125	0.1%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
69	Rolls-Royce Military Aero Engines Ltd 4 awardees, including Rolls-Royce Corporation, Rolls-Royce Marine North America Inc. and Rolls-Royce Solutions America Inc. Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command) DHS (Department of Homeland Security)	$1,441,883	0.1%	Rank history: #89 in FY2022, #84 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
70	Rockwell Collins, Inc. Top agencies USAF (Department of the Air Force)	$1,437,200	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Wheelhouse Group LLC Top agencies Treasury (Department of the Treasury)	$1,430,400	0.1%	Rank history: #67 in FY2022, #64 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
72	Minburn Technology Group, LLC Top agencies VA (Department of Veterans Affairs)	$1,427,607	0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
73	BMT Group Ltd Through BMT Designers & Planners, Inc. Top agencies USDA (Department of Agriculture) DHS (Department of Homeland Security)	$1,411,645	0.1%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
74	Advanced Internet Marketing, Inc. Top agencies Navy (Department of the Navy)	$1,410,433	0.1%	Rank history: #70 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
75	Young & Rubicam Inc. Through Ogilvy Public Relations Worldwide LLC Top agencies USAID (US Agency for International Development)	$1,400,000	0.1%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
76	Cummins Inc. Top agencies Army (Department of the Army)	$1,350,780	0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
77	Panagora Group Inc. Top agencies USAID (US Agency for International Development)	$1,299,558	0.1%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; down 21 since FY2020.
78	Affordable Engineering Services L.L.C. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$1,287,218	0.1%	Rank history: not on the FY2022 list, #96 in FY2023, #69 in FY2024 and #38 in FY2025; up 8 since FY2020.
79	System Dynamics International Incorporated Top agencies USAF (Department of the Air Force)	$1,277,698	0.1%	Rank history: #85 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2020.
80	Microsoft Corporation Top agencies DHS (Department of Homeland Security) USAID (US Agency for International Development)	$1,269,219	0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; down 34 since FY2020.
81	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs)	$1,146,258	0.1%	Rank history: #78 in FY2022, #74 in FY2023, #83 in FY2024 and #84 in FY2025; up 43 since FY2020.
82	Nationwide It Services Inc. Top agencies DOE (Department of Energy)	$1,145,000	0.1%	Rank history: #99 in FY2022, not on the FY2023 list, #96 in FY2024 and not on the FY2025 list; up 120 since FY2020.
83	Communications Resource Inc. Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation)	$1,067,749	0.1%	Rank history: #98 in FY2022, #85 in FY2023, #95 in FY2024 and #92 in FY2025; up 28 since FY2020.
84	Integrated Surveillance and Defense, Inc. Top agencies Navy (Department of the Navy)	$972,836	<0.1%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; up 79 since FY2020.
85	Alan E Fricke Memorials Inc Through Fricke, Alan E Memorials Inc. Top agencies VA (Department of Veterans Affairs)	$959,835	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	BSC Systems, Inc. Top agencies Navy (Department of the Navy)	$955,350	<0.1%	Rank history: #93 in FY2022, #93 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
87	Culpepper & Associates Security Services Inc. Top agencies Navy (Department of the Navy)	$952,354	<0.1%	Rank history: #71 in FY2022, #72 in FY2023, #80 in FY2024 and #80 in FY2025; up 12 since FY2020.
88	Koam Engineering Systems, Inc. Top agencies Navy (Department of the Navy)	$928,391	<0.1%	Rank history: not on the FY2022 list, #24 in FY2023, #41 in FY2024 and #100 in FY2025; down 17 since FY2020.
89	Leonardo S.p.A. 3 awardees, including DRS Advanced ISR LLC Top agencies USAF (Department of the Air Force)	$923,494	<0.1%	Rank history: not on the FY2022–FY2024 lists and #96 in FY2025; down 1 since FY2020.
90	Welin Lambie Limited Top agencies DHS (Department of Homeland Security)	$864,000	<0.1%	Rank history: #86 in FY2022, not on the FY2023–FY2024 lists and #81 in FY2025; up 41 since FY2020.
91	Vision Information Technology Consultants, LLC Top agencies USAF (Department of the Air Force)	$842,556	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
92	Argentech Solutions, Inc. Top agencies USSOCOM (United States Special Operations Command)	$840,368	<0.1%	Rank history: not on the FY2022–FY2023 lists, #51 in FY2024 and #25 in FY2025; down 43 since FY2020.
93	Kratos Defense & Security Solutions, Inc. 2 awardees, including Micro Systems, Inc. Top agencies Army (Department of the Army)	$820,974	<0.1%	Rank history: #59 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
94	Johnson Controls Security Solutions LLC 6 awardees, including Johnson Controls, Inc. and Johnson Controls Fire Protection LP Top agencies USAF (Department of the Air Force) SSA (Social Security Administration) DOI (Department of the Interior)	$810,654	<0.1%	Rank history: #82 in FY2022 and not on the FY2023–FY2025 lists; up 27 since FY2020.
95	Fortis Industries LLC Top agencies Navy (Department of the Navy)	$801,902	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 2 since FY2020.
96	Imes Group Holdings Ltd Through Imes, Inc. Top agencies Navy (Department of the Navy)	$778,552	<0.1%	Rank history: #87 in FY2022, #78 in FY2023, #86 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
97	MCH Consulting Services LLC Top agencies Navy (Department of the Navy)	$775,695	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 17 since FY2020.
98	First Division Consulting Inc. Top agencies Navy (Department of the Navy)	$749,772	<0.1%	Rank history: #83 in FY2022, not on the FY2023 list, #73 in FY2024 and #72 in FY2025; up 74 since FY2020.
99	Solutions Development Corp Top agencies Navy (Department of the Navy)	$738,864	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 36 since FY2020.
100	Intellectechs Inc. Top agencies Navy (Department of the Navy)	$730,691	<0.1%	Rank history: not on the FY2022 list, #87 in FY2023, #81 in FY2024 and #90 in FY2025; up 6 since FY2020.

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100 of 619 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC L0

Code	Net obligations	Largest contractor
L099 Technical Representation Services: Miscellaneous	$223,614,423	BAE Systems PLC
L020 Technical Representation Services: Ship and Marine Equipment	$54,662,794	Amentum Services, Inc.
L069 Technical Representation Services: Training Aids and Devices	$44,485,518	Riptide Software, Inc.
L070 Technical Representation Services: Automatic Data Processing Equipment (Including Firmware), Software, Supplies and Support Equipment	$27,231,814	The Informatics Applications Group, Inc.
L063 Technical Representation Services: Alarm, Signal, and Security Detection Systems	$10,873,738	Adamo Construction Inc.
L059 Technical Representation Services: Electrical and Electronic Equipment Components	$7,205,308	Leonardo S.p.A.
L066 Technical Representation Services: Instruments and Laboratory Equipment	$6,006,410	The Remi Group 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 $2.04 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 L0 contractors in FY2021?

1. Northrop Grumman Corporation ($302M), 2. The Boeing Company ($234M), 3. BAE Systems PLC ($219M), 4. RTX Corporation ($149M), 5. Amentum Services, Inc. ($132M), 6. Textron Inc. ($92.2M), 7. Lockheed Martin Corporation ($84.5M), 8. Kbr, Inc. ($60.7M), 9. Scientific Research Corporation ($54.1M), 10. BAE Systems Land & Armaments L.P. ($53.6M).

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