Top 100 Contractors in PSC J063: Maintenance, Repair and Rebuilding of Equipment: Alarm, Signal, and Security Detection Systems, FY2021

Name: Top 100 Contractors in PSC J063: Maintenance, Repair and Rebuilding of Equipment: Alarm, Signal, and Security Detection Systems, FY2021
Creator: GovTribe

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

The top 10 won 82% of FY2021 PSC J063 contract dollars

Contract obligations: $591,698,451 Net of deobligations, by contracts coded PSC J063
Contractors: 482 Parent companies with an obligation
Largest contractor: Techflow, Inc. $188 million, 30.7% 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	Techflow, Inc. Top agencies DHS (Department of Homeland Security)	$188,480,090	30.7%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; unchanged since FY2020.
2	Leidos Holdings, Inc. 4 awardees, including Leidos, Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force) CSOSA (Court Services and Offender Supervision Agency)	$169,620,561	27.6%	Rank history: #2 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; unchanged since FY2020.
3	General Dynamics Corporation 2 awardees, including General Dynamics Mission Systems, Inc. and General Dynamics Information Technology, Inc. Top agencies Navy (Department of the Navy) DOT (Department of Transportation)	$50,573,541	8.2%	Rank history: #4 in FY2022, #4 in FY2023, #3 in FY2024 and #3 in FY2025; unchanged since FY2020.
4	M.c. Dean, Inc. Top agencies AOUSC (Administrative Office of the U.S. Courts) Navy (Department of the Navy) DHS (Department of Homeland Security)	$32,962,767	5.4%	Rank history: #3 in FY2022, #3 in FY2023, #4 in FY2024 and #4 in FY2025; up 21 since FY2020.
5	Science Applications International Corporation Top agencies USAF (Department of the Air Force)	$18,687,350	3.0%	Rank history: #5 in FY2022, #5 in FY2023, #5 in FY2024 and #5 in FY2025; new, not ranked in FY2020.
6	Triple Canopy Inc. Top agencies DHS (Department of Homeland Security)	$15,887,691	2.6%	Rank history: #6 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
7	Johnson Controls Security Solutions LLC 15 awardees, including Johnson Controls, Inc., Johnson Controls Fire Protection LP and Johnson Controls Building Automation Systems, LLC Top agencies AOUSC (Administrative Office of the U.S. Courts) VA (Department of Veterans Affairs) Army (Department of the Army)	$9,128,088	1.5%	Rank history: #7 in FY2022, #19 in FY2023, #23 in FY2024 and #25 in FY2025; down 2 since FY2020.
8	Kbr, Inc. Through KBR Wyle Services, LLC Top agencies DOT (Department of Transportation)	$6,379,619	1.0%	Rank history: #39 in FY2022, #8 in FY2023, #9 in FY2024 and not on the FY2025 list; down 1 since FY2020.
9	Cynergy Professional Systems LLC Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs) MDA (DOD Missile Defense Agency)	$5,700,202	0.9%	Rank history: #8 in FY2022, #10 in FY2023, #11 in FY2024 and #13 in FY2025; up 41 since FY2020.
10	Vectrus Systems Corporation 2 awardees, including Advantor Systems II LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$4,648,167	0.8%	Rank history: #18 in FY2022, #15 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
11	Cherokee Nation 2 awardees, including Cherokee Federal Solutions, L.L.C. and Cherokee Services Group LLC Top agencies Treasury (Department of the Treasury)	$4,590,248	0.7%	Rank history: #12 in FY2022, #64 in FY2023 and not on the FY2024–FY2025 lists; up 12 since FY2020.
12	Trofholz Technologies, Inc. Top agencies USSOCOM (United States Special Operations Command) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$3,893,734	0.6%	Rank history: #13 in FY2022, #12 in FY2023, #14 in FY2024 and #16 in FY2025; up 3 since FY2020.
13	Siemens Aktiengesellschaft 3 awardees, including Siemens Industry Inc. and Siemens Mobility GMBH Top agencies Commerce (Department of Commerce) VA (Department of Veterans Affairs) Army (Department of the Army)	$3,631,331	0.6%	Rank history: #16 in FY2022, #17 in FY2023, #35 in FY2024 and not on the FY2025 list; up 11 since FY2020.
14	OSI Systems Inc. 2 awardees, including American Science & Engineering Inc. and Rapiscan Systems Inc. Top agencies USAF (Department of the Air Force) AOUSC (Administrative Office of the U.S. Courts) Treasury (Department of the Treasury)	$3,581,827	0.6%	Rank history: #27 in FY2022, #30 in FY2023, #40 in FY2024 and not on the FY2025 list; up 55 since FY2020.
15	Smiths Group PLC Through Smiths Detection Inc. Top agencies DHS (Department of Homeland Security) AOUSC (Administrative Office of the U.S. Courts) DOJ (Department of Justice)	$3,091,051	0.5%	Rank history: #21 in FY2022, #13 in FY2023, #95 in FY2024 and not on the FY2025 list; up 13 since FY2020.
16	Serco North America (Holdings) Inc Through Serco Inc. Top agencies Navy (Department of the Navy)	$3,075,055	0.5%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
17	Signet Technologies Inc. 3 awardees, including Convergint Technologies LLC Top agencies DLA (Defense Logistics Agency) DISA (Defense Information Systems Agency) Navy (Department of the Navy)	$2,771,937	0.5%	Rank history: #20 in FY2022, #23 in FY2023, #15 in FY2024 and #17 in FY2025; down 7 since FY2020.
18	Itm4G LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$2,352,273	0.4%	Rank history: #22 in FY2022, #34 in FY2023, #83 in FY2024 and #70 in FY2025; unchanged since FY2020.
19	Evergreen Fire Alarms LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DLA (Defense Logistics Agency)	$2,291,966	0.4%	Rank history: #24 in FY2022, #14 in FY2023, #19 in FY2024 and #20 in FY2025; up 8 since FY2020.
20	Versar Inc. 2 awardees, including Versar Security Systems, LLC Top agencies DLA (Defense Logistics Agency) GAO (Government Accountability Office) DFAS (Defense Finance and Accounting Service)	$1,864,209	0.3%	Rank history: #29 in FY2022, #36 in FY2023 and not on the FY2024–FY2025 lists; up 79 since FY2020.
21	Security2000 LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$1,791,645	0.3%	Rank history: #40 in FY2022, #42 in FY2023, #47 in FY2024 and #38 in FY2025; up 27 since FY2020.
22	Surescan Corporation Top agencies DHS (Department of Homeland Security)	$1,630,804	0.3%	Rank history: #26 in FY2022, #45 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2020.
23	Systems Northwest, LLC Top agencies HHS (Department of Health and Human Services)	$1,612,199	0.3%	Rank history: #38 in FY2022, #27 in FY2023, #26 in FY2024 and #84 in FY2025; up 43 since FY2020.
24	Symetrica Inc. Top agencies DHS (Department of Homeland Security)	$1,602,796	0.3%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; down 12 since FY2020.
25	Firelake Construction Inc. Top agencies Army (Department of the Army)	$1,476,290	0.2%	Rank history: #33 in FY2022, #31 in FY2023, #36 in FY2024 and #18 in FY2025; up 6 since FY2020.
26	Analogic Corporation Top agencies DHS (Department of Homeland Security)	$1,444,756	0.2%	Rank history: #25 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; down 5 since FY2020.
27	Integrated Security Technologies, Inc. Top agencies EOP (Executive Office of the President) Navy (Department of the Navy) DOJ (Department of Justice)	$1,387,805	0.2%	Rank history: #41 in FY2022, #25 in FY2023, #29 in FY2024 and #26 in FY2025; new, not ranked in FY2020.
28	Vista Defense Technologies, LLC Top agencies Army (Department of the Army)	$1,266,783	0.2%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
29	Planning, Inc. Top agencies DISA (Defense Information Systems Agency) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,193,442	0.2%	Rank history: #72 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
30	The Concourse Group, LLC Top agencies Navy (Department of the Navy)	$1,177,740	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	Chenega Security International, LLC Top agencies Navy (Department of the Navy)	$1,072,598	0.2%	Rank history: #31 in FY2022, #32 in FY2023, #33 in FY2024 and #29 in FY2025; up 5 since FY2020.
32	Hurtvet Subcontracting, Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$1,043,028	0.2%	Rank history: #35 in FY2022, #44 in FY2023 and not on the FY2024–FY2025 lists; down 10 since FY2020.
33	Computer Information Systems Inc. Through Security Information Systems, LLC Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$983,887	0.2%	Rank history: #73 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; up 211 since FY2020.
34	Professional Technologies Group, Inc. Top agencies Army (Department of the Army)	$977,598	0.2%	Rank history: #55 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
35	Integrity Protection Systems LLC Top agencies VA (Department of Veterans Affairs)	$935,099	0.2%	Rank history: #62 in FY2022, #52 in FY2023, #54 in FY2024 and #45 in FY2025; new, not ranked in FY2020.
36	BAE Systems PLC Through BAE Systems Technology Solutions & Services Inc. Top agencies Navy (Department of the Navy)	$926,851	0.2%	Rank history: #61 in FY2022, #47 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
37	Starboard Industries LLC Top agencies VA (Department of Veterans Affairs)	$906,093	0.1%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
38	Afognak Native Corporation 3 awardees, including Red Peak Technical Services, LLC and Shields Point LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$852,828	0.1%	Rank history: #19 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; up 127 since FY2020.
39	Apogee-Ssu Joint Venture LLC Top agencies DHS (Department of Homeland Security)	$814,402	0.1%	Rank history: #34 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
40	Blue Construction Services LLC Top agencies USAF (Department of the Air Force)	$749,426	0.1%	Rank history: #50 in FY2022, #48 in FY2023, #52 in FY2024 and not on the FY2025 list; up 6 since FY2020.
41	Lorimar Group, Inc. Top agencies Navy (Department of the Navy)	$739,500	0.1%	Rank history: not on the FY2022–FY2025 lists; up 6 since FY2020.
42	Oatridge Security Group, Inc. Top agencies Army (Department of the Army)	$723,533	0.1%	Rank history: #51 in FY2022, #80 in FY2023 and not on the FY2024–FY2025 lists; up 10 since FY2020.
43	Mts3 Inc. Through Mandex Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$705,399	0.1%	Rank history: #54 in FY2022, #51 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
44	Advanced It Concepts, LLC Top agencies Army (Department of the Army)	$695,864	0.1%	Rank history: #49 in FY2022, #37 in FY2023, #46 in FY2024 and #56 in FY2025; down 10 since FY2020.
45	Red Heritage Media LLC Top agencies DOE (Department of Energy)	$687,961	0.1%	Rank history: #88 in FY2022, #88 in FY2023, #86 in FY2024 and #69 in FY2025; new, not ranked in FY2020.
46	Strategic Endeavor LLC Top agencies NRC (Nuclear Regulatory Commission)	$676,760	0.1%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
47	Digital Air Control, Inc. Top agencies Army (Department of the Army)	$661,666	0.1%	Rank history: #66 in FY2022, not on the FY2023–FY2024 lists and #40 in FY2025; new, not ranked in FY2020.
48	Intellimar Inc. Through Concentric Security LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security)	$657,448	0.1%	Rank history: #63 in FY2022, #55 in FY2023 and not on the FY2024–FY2025 lists; up 7 since FY2020.
49	Tic Security, LLC Top agencies DHS (Department of Homeland Security) Treasury (Department of the Treasury) SSA (Social Security Administration)	$629,026	0.1%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; down 10 since FY2020.
50	Stanley Black & Decker, Inc. 2 awardees, including Securitas Technology Corporation Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security) DOI (Department of the Interior)	$618,536	0.1%	Rank history: #78 in FY2022, not on the FY2023 list, #71 in FY2024 and not on the FY2025 list; down 13 since FY2020.
51	Native American Electric, Inc. Top agencies DOI (Department of the Interior)	$605,800	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
52	Idemia Identity & Security USA LLC Top agencies DHS (Department of Homeland Security)	$593,525	0.1%	Rank history: #37 in FY2022, #35 in FY2023, #43 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
53	Zeva Incorporated Top agencies VA (Department of Veterans Affairs)	$524,060	0.1%	Rank history: #83 in FY2022, #73 in FY2023, not on the FY2024 list and #49 in FY2025; new, not ranked in FY2020.
54	Point Security Inc. Top agencies DOT (Department of Transportation)	$507,014	0.1%	Rank history: #43 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; up 212 since FY2020.
55	Securitas AB Through Securitas Electronic Security, Inc. Top agencies Treasury (Department of the Treasury) DOJ (Department of Justice) AOUSC (Administrative Office of the U.S. Courts)	$503,609	0.1%	Rank history: not on the FY2022–FY2025 lists; up 30 since FY2020.
56	Acme Technical Group LLC Top agencies VA (Department of Veterans Affairs) DOJ (Department of Justice)	$503,500	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
57	Securitas Electronic Security, Inc. Top agencies Treasury (Department of the Treasury)	$490,418	0.1%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; up 43 since FY2020.
58	X Cell Management Inc. Top agencies Army (Department of the Army)	$488,796	0.1%	Rank history: #64 in FY2022, #59 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
59	Electronic Specialty Co Top agencies VA (Department of Veterans Affairs)	$456,780	0.1%	Rank history: #71 in FY2022, #92 in FY2023, #73 in FY2024 and #54 in FY2025; up 5 since FY2020.
60	ROK Systems Through Avasure, LLC Top agencies Army (Department of the Army)	$451,279	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Cam-Dex Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army) VA (Department of Veterans Affairs)	$449,065	0.1%	Rank history: not on the FY2022 list, #99 in FY2023, #68 in FY2024 and #67 in FY2025; up 4 since FY2020.
62	Sistemi Integrati Omse SRL Through Sistemi Integrati Antincendio E Sicurezza Top agencies USAF (Department of the Air Force)	$442,271	0.1%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
63	Scdatacom, LLC Top agencies VA (Department of Veterans Affairs)	$433,436	0.1%	Rank history: not on the FY2022–FY2025 lists; up 78 since FY2020.
64	F-Concepts, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$430,210	0.1%	Rank history: #77 in FY2022, not on the FY2023 list, #55 in FY2024 and #92 in FY2025; up 60 since FY2020.
65	Usmax Corporation Top agencies USAGM (US Agency for Global Media)	$421,825	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	Adept Patriot Services LLC Top agencies VA (Department of Veterans Affairs)	$411,738	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Johnson Controls Building Automation Systems, LLC Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$409,991	0.1%	Rank history: not on the FY2022–FY2023 lists, #63 in FY2024 and #24 in FY2025; up 1 since FY2020.
68	M3T Corporation Top agencies Army (Department of the Army) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$408,031	0.1%	Rank history: #69 in FY2022, #57 in FY2023, #42 in FY2024 and #41 in FY2025; up 14 since FY2020.
69	General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy)	$402,180	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Huang's Inc. Top agencies DOJ (Department of Justice)	$400,656	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Media Plumbing & Heating Inc. Top agencies Army (Department of the Army) OPM (Office of Personnel Management) Commerce (Department of Commerce)	$399,088	0.1%	Rank history: #44 in FY2022, #41 in FY2023, #16 in FY2024 and #14 in FY2025; down 15 since FY2020.
72	American Security Programs Inc 4 awardees, including Securadyne Systems Intermediate LLC and Service Works, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$395,638	0.1%	Rank history: #75 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; up 51 since FY2020.
73	Integrity Technology Service Inc. Top agencies Army (Department of the Army)	$395,250	0.1%	Rank history: not on the FY2022–FY2025 lists; up 240 since FY2020.
74	Sev1Tech, LLC Top agencies Navy (Department of the Navy)	$394,943	0.1%	Rank history: #15 in FY2022, #7 in FY2023, #18 in FY2024 and #90 in FY2025; down 66 since FY2020.
75	California Pacific Technical Services LLC Top agencies Navy (Department of the Navy)	$381,040	0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
76	Condortech Services, Inc. Top agencies DMA (Defense Media Activity) Navy (Department of the Navy) DHS (Department of Homeland Security)	$370,932	0.1%	Rank history: not on the FY2022 list, #61 in FY2023 and not on the FY2024–FY2025 lists; down 16 since FY2020.
77	Progressive Electronics Inc. Top agencies VA (Department of Veterans Affairs)	$370,367	0.1%	Rank history: not on the FY2022–FY2025 lists; up 4 since FY2020.
78	Rock Creek Logistics, Technology, & Management Business Solutions LLC Top agencies Army (Department of the Army)	$370,244	0.1%	Rank history: #89 in FY2022, #81 in FY2023, #45 in FY2024 and #46 in FY2025; up 40 since FY2020.
79	Electronic Technologies Corporation USA Top agencies USAF (Department of the Air Force)	$348,840	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Excalibur Associates Inc. Top agencies Army (Department of the Army)	$328,671	0.1%	Rank history: not on the FY2022 list, #84 in FY2023 and not on the FY2024–FY2025 lists; up 15 since FY2020.
81	Kastle Systems LLC Top agencies SBA (Small Business Administration) Treasury (Department of the Treasury) OSC (US Office of Special Counsel)	$316,025	0.1%	Rank history: #91 in FY2022, #98 in FY2023, #87 in FY2024 and #72 in FY2025; down 24 since FY2020.
82	AMW Security & Telecommunications Solutions LLC Top agencies Army (Department of the Army)	$309,080	0.1%	Rank history: not on the FY2022–FY2025 lists; down 40 since FY2020.
83	Chugach Technical Solutions LLC Top agencies DHS (Department of Homeland Security)	$307,178	<0.1%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
84	Government Contracting Services LLC Top agencies USAF (Department of the Air Force)	$283,680	<0.1%	Rank history: not on the FY2022 list, #56 in FY2023, not on the FY2024 list and #55 in FY2025; up 3 since FY2020.
85	Cherokee Federal Solutions, L.L.C. Top agencies Army (Department of the Army)	$278,739	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 76 since FY2020.
86	Rascap LLC Top agencies VA (Department of Veterans Affairs)	$276,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	PMA Associates, Inc. Top agencies Navy (Department of the Navy)	$275,293	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	K2 Contracting Group, LLC Top agencies DOI (Department of the Interior)	$272,925	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Pass, L.l.c Top agencies VA (Department of Veterans Affairs)	$262,555	<0.1%	Rank history: #93 in FY2022, #82 in FY2023, #74 in FY2024 and #65 in FY2025; up 7 since FY2020.
90	Communications Resource Inc. Top agencies CSOSA (Court Services and Offender Supervision Agency) Treasury (Department of the Treasury)	$261,782	<0.1%	Rank history: #36 in FY2022, not on the FY2023 list, #64 in FY2024 and not on the FY2025 list; up 138 since FY2020.
91	Borja Engineering & Construction, Inc. Top agencies VA (Department of Veterans Affairs)	$258,308	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
92	Comco, Inc. Top agencies Army (Department of the Army)	$257,340	<0.1%	Rank history: #99 in FY2022, #100 in FY2023, #97 in FY2024 and not on the FY2025 list; down 1 since FY2020.
93	Hogan Security Group LLC Top agencies Army (Department of the Army)	$253,680	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Virsig, LLC Top agencies VA (Department of Veterans Affairs)	$245,513	<0.1%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
95	Electripro, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army)	$241,251	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 15 since FY2020.
96	Honeywell International Inc. 5 awardees, including Honeywell Building Solutions GMBH Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) DLA (Defense Logistics Agency)	$237,086	<0.1%	Rank history: #42 in FY2022, #22 in FY2023, #24 in FY2024 and #39 in FY2025; down 33 since FY2020.
97	Trigent Solutions Inc. Top agencies Army (Department of the Army)	$236,823	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 7 since FY2020.
98	Ma Impianti S.R.L. Top agencies Army (Department of the Army)	$235,924	<0.1%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
99	J2 Associates, LLC Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$233,769	<0.1%	Rank history: not on the FY2022–FY2023 lists, #92 in FY2024 and #60 in FY2025; up 119 since FY2020.
100	Ideal System Solutions, Inc. Top agencies DHA (Defense Health Agency)	$233,702	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 85 since FY2020.

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100 of 482 contractors listed here. See the rest on GovTribe.

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 $615 million 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 J063 contractors in FY2021?

1. Techflow, Inc. ($188M), 2. Leidos Holdings, Inc. ($170M), 3. General Dynamics Corporation ($50.6M), 4. M.c. Dean, Inc. ($33M), 5. Science Applications International Corporation ($18.7M), 6. Triple Canopy Inc. ($15.9M), 7. Johnson Controls Security Solutions LLC ($9.13M), 8. Kbr, Inc. ($6.38M), 9. Cynergy Professional Systems LLC ($5.7M), 10. Vectrus Systems Corporation ($4.65M).

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