Top 100 Contractors in PSC DJ: IT and Telecom – Security and Compliance, FY2021

Name: Top 100 Contractors in PSC DJ: IT and Telecom – Security and Compliance, FY2021
Creator: GovTribe

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

The top 10 won 57% of FY2021 PSC DJ contract dollars

Contract obligations: $858,931,843 Net of deobligations, by contracts coded PSC DJ or a code under it
Contractors: 292 Parent companies with an obligation
Largest contractor: Perspecta Inc. $174 million, 20.1% 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	Perspecta Inc. Through Peraton Enterprise Solutions LLC Top agencies Navy (Department of the Navy)	$174,005,687	20.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
2	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) Army (Department of the Army)	$150,782,971	17.4%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; new, not ranked in FY2020.
3	Iron Vine Security LLC Top agencies HHS (Department of Health and Human Services) ED (Department of Education)	$39,833,265	4.6%	Rank history: #2 in FY2022, not on the FY2023 list, #5 in FY2024 and #6 in FY2025; new, not ranked in FY2020.
4	Arctic Slope Regional Corporation 2 awardees, including Asrc Communications, Ltd. and Netcentric Technology, LLC Top agencies DISA (Defense Information Systems Agency) DHRA (Defense Human Resources Activity)	$28,456,734	3.3%	Rank history: #3 in FY2022, #6 in FY2023, #8 in FY2024 and #2 in FY2025; new, not ranked in FY2020.
5	HP Enterprise Services LLC 2 awardees, including Peraton Enterprise Solutions LLC and Peraton Technology Services Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$23,752,035	2.7%	Rank history: #7 in FY2022, #17 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
6	Northrop Grumman Corporation 2 awardees, including Northrop Grumman Systems Corporation Top agencies DISA (Defense Information Systems Agency) Navy (Department of the Navy)	$17,621,466	2.0%	Rank history: #33 in FY2022, #32 in FY2023, not on the FY2024 list and #37 in FY2025; new, not ranked in FY2020.
7	Broadleaf, Inc. Top agencies DCSA (Defense Counterintelligence and Security Agency)	$16,415,790	1.9%	Rank history: #9 in FY2022, not on the FY2023 list, #70 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
8	Nana Regional Corporation Inc 2 awardees, including Cloud Lake Technology LLC and Affigent, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$14,915,122	1.7%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
9	Foxhole Technology LLC Top agencies DHS (Department of Homeland Security) ED (Department of Education) DOT (Department of Transportation)	$14,478,111	1.7%	Rank history: #13 in FY2022, #18 in FY2023, #22 in FY2024 and #19 in FY2025; new, not ranked in FY2020.
10	Microsoft Corporation Top agencies DOJ (Department of Justice) DOT (Department of Transportation)	$13,560,440	1.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
11	Sentrillion Corporation Top agencies DHS (Department of Homeland Security)	$13,516,361	1.6%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
12	Saliense Consulting LLC Top agencies DHS (Department of Homeland Security)	$13,168,344	1.5%	Rank history: #10 in FY2022, #25 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
13	Thundercat Technology, LLC Top agencies DHS (Department of Homeland Security) USSOCOM (United States Special Operations Command) Commerce (Department of Commerce)	$11,836,766	1.4%	Rank history: #20 in FY2022, #41 in FY2023, #34 in FY2024 and #36 in FY2025; new, not ranked in FY2020.
14	Agile-Bot II LLC Top agencies Navy (Department of the Navy)	$9,980,818	1.2%	Rank history: #15 in FY2022, #22 in FY2023, #26 in FY2024 and #26 in FY2025; new, not ranked in FY2020.
15	Nippon Telegraph and Telephone Corporation Through NTT Data Federal Services, Inc. Top agencies DOJ (Department of Justice)	$8,422,460	1.0%	Rank history: #24 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
16	The IQ Business Group (PTY) Ltd Through The IQ Business Group, Inc. Top agencies DOI (Department of the Interior)	$8,354,106	1.0%	Rank history: #35 in FY2022, #59 in FY2023, #95 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
17	Visual Connections LLC Top agencies HHS (Department of Health and Human Services)	$8,318,224	1.0%	Rank history: #32 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
18	International Business Machines Corporation Top agencies Treasury (Department of the Treasury) VA (Department of Veterans Affairs)	$8,308,467	1.0%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
19	Sierra7, Inc. Top agencies VA (Department of Veterans Affairs) DHS (Department of Homeland Security)	$8,300,383	1.0%	Rank history: #29 in FY2022, not on the FY2023 list, #38 in FY2024 and #44 in FY2025; new, not ranked in FY2020.
20	Softek Feditc LLC Top agencies DHS (Department of Homeland Security)	$8,019,543	0.9%	Rank history: #12 in FY2022, #19 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
21	Accenture Federal Services LLC Top agencies DHS (Department of Homeland Security) DOE (Department of Energy)	$7,896,204	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
22	Silosmashers, Inc. Top agencies DHS (Department of Homeland Security)	$7,441,464	0.9%	Rank history: #25 in FY2022, #38 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
23	Po`okela Solutions, LLC Top agencies Army (Department of the Army)	$7,058,591	0.8%	Rank history: #39 in FY2022, #49 in FY2023, #28 in FY2024 and #17 in FY2025; new, not ranked in FY2020.
24	Netorian Limited Liability Company Top agencies USAF (Department of the Air Force)	$6,929,223	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
25	Mindpoint Group LLC Top agencies Treasury (Department of the Treasury)	$6,754,234	0.8%	Rank history: not on the FY2022 list, #51 in FY2023, #55 in FY2024 and #50 in FY2025; new, not ranked in FY2020.
26	Discover Technologies LLC Top agencies HHS (Department of Health and Human Services)	$6,742,136	0.8%	Rank history: #69 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
27	International Business Sales and Services Corp Top agencies DODEA (Department of Defense Education Activity)	$6,642,507	0.8%	Rank history: #53 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
28	Sysnet Technologies, Inc. Top agencies DOT (Department of Transportation)	$6,550,516	0.8%	Rank history: #48 in FY2022, #34 in FY2023, #36 in FY2024 and #20 in FY2025; new, not ranked in FY2020.
29	Lockheed Martin Corporation Top agencies Navy (Department of the Navy)	$6,327,677	0.7%	Rank history: #41 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
30	Zermount, Inc. Top agencies DHS (Department of Homeland Security)	$6,003,188	0.7%	Rank history: #46 in FY2022, #35 in FY2023, #35 in FY2024 and #39 in FY2025; new, not ranked in FY2020.
31	Veterans EZ Info Inc. Top agencies VA (Department of Veterans Affairs)	$5,877,914	0.7%	Rank history: #49 in FY2022, #58 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
32	Valiant Solutions, LLC Top agencies ED (Department of Education)	$4,626,760	0.5%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
33	XOR Security LLC Top agencies DHS (Department of Homeland Security) PCLOB (Privacy and Civil Liberties Oversight Board) FTC (Federal Trade Commission)	$4,496,625	0.5%	Rank history: #87 in FY2022, not on the FY2023 list, #51 in FY2024 and #59 in FY2025; new, not ranked in FY2020.
34	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies HHS (Department of Health and Human Services) Navy (Department of the Navy) DISA (Defense Information Systems Agency)	$3,735,845	0.4%	Rank history: #16 in FY2022, #4 in FY2023, #6 in FY2024 and #8 in FY2025; new, not ranked in FY2020.
35	EDC Consulting, LLC Through Mclane Advanced Technologies LLC Top agencies DOE (Department of Energy)	$3,692,025	0.4%	Rank history: #55 in FY2022, #65 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
36	Carahsoft Technology Corp Top agencies GSA (General Services Administration) DODEA (Department of Defense Education Activity) DOS (Department of State)	$3,516,119	0.4%	Rank history: #22 in FY2022, #7 in FY2023, #45 in FY2024 and #86 in FY2025; new, not ranked in FY2020.
37	On Assignment, Inc. Through Indrasoft Inc. Top agencies DHRA (Defense Human Resources Activity)	$3,332,050	0.4%	Rank history: #4 in FY2022, #2 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
38	Leidos, Inc. 2 awardees Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$3,298,517	0.4%	Rank history: #45 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
39	Epoch Concepts LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$3,296,681	0.4%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
40	Sentek Consulting, Inc. Top agencies Navy (Department of the Navy)	$3,272,882	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	Presidio Government Solutions LLC Top agencies DOJ (Department of Justice)	$3,127,487	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
42	Alaska Native Government Services LLC Through Copper River Cyber Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$2,949,242	0.3%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
43	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$2,902,003	0.3%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
44	Sysorex Government Services Inc. Top agencies DOJ (Department of Justice)	$2,838,112	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
45	Tacg, LLC Top agencies HHS (Department of Health and Human Services)	$2,825,040	0.3%	Rank history: #56 in FY2022, #64 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
46	Asrc Federal Data Networx, LLC Top agencies Commerce (Department of Commerce)	$2,821,651	0.3%	Rank history: #75 in FY2022, #71 in FY2023, #88 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
47	Amyx Inc. Top agencies DLA (Defense Logistics Agency) DMEA (Defense Microelectronics Activity)	$2,786,300	0.3%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
48	Veteran Technology Partners II LLC Top agencies DHS (Department of Homeland Security)	$2,785,765	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
49	Tetrad Digital Integrity LLC Top agencies Navy (Department of the Navy)	$2,634,994	0.3%	Rank history: #91 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
50	Skyepoint Decisions, Inc. Top agencies ED (Department of Education)	$2,631,616	0.3%	Rank history: #26 in FY2022, #26 in FY2023, #23 in FY2024 and #30 in FY2025; new, not ranked in FY2020.
51	ZEN Strategics LLC Top agencies ED (Department of Education)	$2,616,813	0.3%	Rank history: #14 in FY2022, #11 in FY2023, #9 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
52	Longeviti LLC Top agencies Navy (Department of the Navy)	$2,441,029	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	Axis Management Group, LLC Top agencies Treasury (Department of the Treasury)	$2,434,290	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy)	$2,349,161	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	RTL Networks, Inc. Top agencies Navy (Department of the Navy)	$2,312,002	0.3%	Rank history: #77 in FY2022, #87 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
56	Strategic Data Systems, Inc. Top agencies Navy (Department of the Navy)	$2,273,900	0.3%	Rank history: #83 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
57	Verizon Communications Inc. 4 awardees, including MCI Communications Services LLC, Cellco Partnership and Verizon Washington, DC Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) DOJ (Department of Justice)	$2,257,452	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Sugpiat Defense, LLC Top agencies ED (Department of Education)	$2,212,065	0.3%	Rank history: not on the FY2022 list, #80 in FY2023, #94 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
59	Dev Technology Group Inc. Top agencies DHS (Department of Homeland Security)	$2,189,982	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies SSA (Social Security Administration)	$2,107,781	0.2%	Rank history: #64 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
61	Minburn Technology Group, LLC Top agencies VA (Department of Veterans Affairs)	$2,081,497	0.2%	Rank history: #97 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
62	Information Technology Company, L.L.C. Top agencies DHS (Department of Homeland Security)	$2,069,382	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
63	Seneca Global Services LLC Top agencies DOJ (Department of Justice)	$2,039,911	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
64	Omni Fed LLC Top agencies Army (Department of the Army)	$2,000,000	0.2%	Rank history: #60 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
65	Clarity Innovations LLC Top agencies Army (Department of the Army)	$2,000,000	0.2%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
66	Hana Technologies & Systems, Inc. Top agencies Navy (Department of the Navy)	$1,973,136	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Creative Systems and Consulting L.L.C. Top agencies USDA (Department of Agriculture)	$1,957,670	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	Calibre Systems Inc. Top agencies GSA (General Services Administration)	$1,928,843	0.2%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
69	Am Pierce & Associates, Inc. Top agencies OSD (Office of the Secretary of Defense)	$1,907,078	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	V3Gate, LLC Top agencies OSD (Office of the Secretary of Defense) VA (Department of Veterans Affairs)	$1,877,404	0.2%	Rank history: #98 in FY2022, not on the FY2023–FY2024 lists and #53 in FY2025; new, not ranked in FY2020.
71	Aquarian Systems LLC Top agencies DOS (Department of State)	$1,822,201	0.2%	Rank history: #96 in FY2022, #61 in FY2023, #65 in FY2024 and #79 in FY2025; new, not ranked in FY2020.
72	V3 Gate Team, LLP Top agencies DHS (Department of Homeland Security)	$1,813,195	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Alpha Omega Integration LLC Top agencies Commerce (Department of Commerce)	$1,785,754	0.2%	Rank history: not on the FY2022–FY2023 lists, #63 in FY2024 and #55 in FY2025; new, not ranked in FY2020.
74	Metgreen Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$1,771,000	0.2%	Rank history: not on the FY2022–FY2024 lists and #46 in FY2025; new, not ranked in FY2020.
75	Prince of Wales Tribal Enterprise Consortium LLC Through Powtec Solutions LLC Top agencies DOI (Department of the Interior)	$1,731,878	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	HP, Inc. Through Hewlett-Packard Company Top agencies DOS (Department of State)	$1,730,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Norseman Inc. Top agencies DISA (Defense Information Systems Agency) Navy (Department of the Navy)	$1,700,302	0.2%	Rank history: not on the FY2022 list, #98 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
78	Aretec, Inc. Top agencies DHS (Department of Homeland Security)	$1,671,971	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Oasis Systems, LLC Top agencies NRC (Nuclear Regulatory Commission)	$1,617,251	0.2%	Rank history: #57 in FY2022, #29 in FY2023, #42 in FY2024 and #41 in FY2025; new, not ranked in FY2020.
80	Customer Value Partners, LLC Top agencies HHS (Department of Health and Human Services)	$1,591,489	0.2%	Rank history: #28 in FY2022, #53 in FY2023, #64 in FY2024 and #60 in FY2025; new, not ranked in FY2020.
81	VMD Systems Integrators, LLC Top agencies DHS (Department of Homeland Security)	$1,562,603	0.2%	Rank history: not on the FY2022 list, #99 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
82	Executive Information Systems, L.L.C. Top agencies SSA (Social Security Administration) DOJ (Department of Justice)	$1,515,800	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Deloitte LLP Through Deloitte Consulting LLP Top agencies USAF (Department of the Air Force) DOL (Department of Labor)	$1,479,339	0.2%	Rank history: #17 in FY2022, #3 in FY2023, #2 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
84	Triple Point Security Inc. Top agencies HHS (Department of Health and Human Services)	$1,405,113	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	Criterion Systems, L.L.C. Top agencies DOT (Department of Transportation)	$1,371,172	0.2%	Rank history: #85 in FY2022, #47 in FY2023, #46 in FY2024 and #84 in FY2025; new, not ranked in FY2020.
86	It TECH Direct LLC Top agencies DHS (Department of Homeland Security)	$1,361,645	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
87	August Schell Enterprises, Inc. Top agencies DOJ (Department of Justice) Commerce (Department of Commerce)	$1,360,809	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Softrams LLC Top agencies USDA (Department of Agriculture)	$1,331,538	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Ernst & Young LLP Top agencies DOT (Department of Transportation)	$1,270,590	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Innovative Management Concepts, Inc. Top agencies DHS (Department of Homeland Security)	$1,259,371	0.1%	Rank history: #44 in FY2022, #27 in FY2023, #19 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
91	Alvarez LLC Top agencies DISA (Defense Information Systems Agency) Navy (Department of the Navy) Commerce (Department of Commerce)	$1,251,894	0.1%	Rank history: not on the FY2022–FY2024 lists and #88 in FY2025; new, not ranked in FY2020.
92	Four LLC Top agencies DOJ (Department of Justice) GSA (General Services Administration) Army (Department of the Army)	$1,179,858	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Iqvia Inc. Through Iqvia Government Solutions Inc. Top agencies Army (Department of the Army)	$1,168,683	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	The One 23 Group Inc. Top agencies DHS (Department of Homeland Security)	$1,122,195	0.1%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
95	Obsidian Global, LLC Top agencies ED (Department of Education)	$1,112,453	0.1%	Rank history: #27 in FY2022, #42 in FY2023, #15 in FY2024 and #27 in FY2025; new, not ranked in FY2020.
96	Sapient Corporation Through Sapient Government Services, Inc. Top agencies CPSC (Consumer Product Safety Commission)	$1,090,496	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Integrated Security Technologies, Inc. Top agencies DOE (Department of Energy)	$1,090,268	0.1%	Rank history: #67 in FY2022, #70 in FY2023, #54 in FY2024 and #56 in FY2025; new, not ranked in FY2020.
98	Dynamo Technologies, LLC Top agencies USDA (Department of Agriculture)	$1,028,832	0.1%	Rank history: #11 in FY2022, #9 in FY2023, #11 in FY2024 and #12 in FY2025; new, not ranked in FY2020.
99	Intellipeak Solutions Inc. Top agencies DISA (Defense Information Systems Agency)	$990,900	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	Coalfire Systems, Inc. Through Veris Group, LLC Top agencies HHS (Department of Health and Human Services) SSA (Social Security Administration)	$988,009	0.1%	Rank history: not on the FY2022 list, #76 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.

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100 of 292 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC DJ

Code	Net obligations	Largest contractor
DJ01 IT and Telecom – Security and Compliance Support Services (Labor)	$684,246,901	Perspecta Inc.
DJ10 IT and Telecom – Security and Compliance as a Service	$174,684,942	Leidos Holdings, Inc.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $865 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 DJ contractors in FY2021?

1. Perspecta Inc. ($174M), 2. Leidos Holdings, Inc. ($151M), 3. Iron Vine Security LLC ($39.8M), 4. Arctic Slope Regional Corporation ($28.5M), 5. HP Enterprise Services LLC ($23.8M), 6. Northrop Grumman Corporation ($17.6M), 7. Broadleaf, Inc. ($16.4M), 8. Nana Regional Corporation Inc ($14.9M), 9. Foxhole Technology LLC ($14.5M), 10. Microsoft Corporation ($13.6M).

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