Top 100 Contractors in PSC DG: IT and Telecom – Network, FY2021

Name: Top 100 Contractors in PSC DG: IT and Telecom – Network, FY2021
Creator: GovTribe

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

The top 10 won 47% of FY2021 PSC DG contract dollars

Contract obligations: $2,046,049,194 Net of deobligations, by contracts coded PSC DG or a code under it
Contractors: 1,001 Parent companies with an obligation
Largest contractor: Vectrus Systems Corporation $183 million, 8.0% 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	Vectrus Systems Corporation Through V2X Systems LLC Top agencies Army (Department of the Army)	$183,116,285	8.0%	Rank history: #5 in FY2022, #7 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
2	At&T Inc. 26 awardees, including At&T Enterprises, LLC, Att Mobility LLC and At&T Mobility National Accounts LLC Top agencies DHS (Department of Homeland Security) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$142,476,513	6.2%	Rank history: #4 in FY2022, #4 in FY2023, #2 in FY2024 and #4 in FY2025; new, not ranked in FY2020.
3	General Dynamics Corporation 4 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Army (Department of the Army) DISA (Defense Information Systems Agency) Navy (Department of the Navy)	$131,854,691	5.8%	Rank history: #7 in FY2022, #10 in FY2023, #9 in FY2024 and #5 in FY2025; new, not ranked in FY2020.
4	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies DISA (Defense Information Systems Agency) Navy (Department of the Navy)	$125,358,607	5.5%	Rank history: #2 in FY2022, #3 in FY2023, #8 in FY2024 and #10 in FY2025; new, not ranked in FY2020.
5	Verizon Communications Inc. 14 awardees, including Verizon Business Network Services LLC, MCI Communications Services LLC and Cellco Partnership Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$119,124,074	5.2%	Rank history: #3 in FY2022, #1 in FY2023, #44 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
6	Perspecta Inc. 2 awardees, including Peraton Enterprise Solutions LLC and Knight Point Systems, LLC Top agencies Navy (Department of the Navy) DISA (Defense Information Systems Agency)	$92,134,197	4.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
7	L3Harris Technologies, Inc. 3 awardees, including Harris Corporation, L3Harris Cincinnati Electronics Corporation and NV5 Geospatial Solutions, Inc. Top agencies DOT (Department of Transportation) Navy (Department of the Navy) DOJ (Department of Justice)	$89,796,099	3.9%	Rank history: #6 in FY2022, #2 in FY2023, #4 in FY2024 and #1 in FY2025; new, not ranked in FY2020.
8	Lumen Technologies, Inc. 11 awardees, including Lumen Technologies Government Solutions, Inc., Level 3 Communications, LLC and Level 3 Telecom Holdings, LLC Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) VA (Department of Veterans Affairs)	$76,050,666	3.3%	Rank history: #1 in FY2022, #9 in FY2023, #11 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
9	Stratos Government Services, Inc. Through Inmarsat Government, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) Army (Department of the Army)	$58,942,309	2.6%	Rank history: #8 in FY2022, #5 in FY2023, #25 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
10	BT North America Inc. 2 awardees, including 22Nd Century Networks, Inc. and British Telecommunications Public Limited Company Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$48,020,319	2.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
11	Artel LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$43,835,809	1.9%	Rank history: #11 in FY2022, #15 in FY2023, #20 in FY2024 and #29 in FY2025; new, not ranked in FY2020.
12	Lumen Technologies Government Solutions, Inc. 2 awardees Top agencies DISA (Defense Information Systems Agency) FEC (Federal Election Commission) USAF (Department of the Air Force)	$34,090,710	1.5%	Rank history: #58 in FY2022, not on the FY2023 list, #12 in FY2024 and #8 in FY2025; new, not ranked in FY2020.
13	Granite Telecommunications, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHA (Defense Health Agency)	$30,467,988	1.3%	Rank history: #27 in FY2022, not on the FY2023 list, #89 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
14	Global Telecom & Technology Inc. 2 awardees, including GTT Americas, LLC and GTT Global Telecom Government Services, LLC Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) Army (Department of the Army)	$27,806,579	1.2%	Rank history: #13 in FY2022, not on the FY2023 list, #88 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
15	Koniag, Inc. 3 awardees, including Tuknik Government Services LLC, Eagle Harbor Solutions LLC and Pacarctic, LLC Top agencies SSA (Social Security Administration) Army (Department of the Army) DOS (Department of State)	$23,876,950	1.0%	Rank history: #91 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
16	Seneca Global Services LLC Top agencies DOJ (Department of Justice)	$23,492,236	1.0%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
17	The Boeing Company Top agencies USAF (Department of the Air Force)	$22,238,580	1.0%	Rank history: #18 in FY2022, #21 in FY2023, #31 in FY2024 and #67 in FY2025; new, not ranked in FY2020.
18	Jacobs Engineering Group Inc. 2 awardees, including Amentum Technology, Inc. Top agencies USSOCOM (United States Special Operations Command) MDA (DOD Missile Defense Agency)	$21,789,288	1.0%	Rank history: #14 in FY2022, #8 in FY2023, #98 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
19	Advanced Technology Systems Inc. Through Salient Crgt, Inc. Top agencies VA (Department of Veterans Affairs)	$21,701,039	0.9%	Rank history: not on the FY2022 list, #17 in FY2023, #16 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
20	Nana Regional Corporation Inc 2 awardees, including Affigent, LLC and Tuva LLC Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) Army (Department of the Army)	$21,039,626	0.9%	Rank history: #42 in FY2022, #75 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
21	Northrop Grumman Corporation 3 awardees, including Northrop Grumman Systems Corporation Top agencies SSA (Social Security Administration) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$20,167,820	0.9%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
22	Core Technologies, LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$19,819,581	0.9%	Rank history: #16 in FY2022, #98 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
23	Deloitte LLP Through Deloitte Consulting LLP Top agencies Treasury (Department of the Treasury) HHS (Department of Health and Human Services)	$17,946,922	0.8%	Rank history: #20 in FY2022, #23 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
24	Dell Federal Systems L.P. 2 awardees, including Dell Marketing L.P. Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) Army (Department of the Army)	$16,963,906	0.7%	Rank history: #50 in FY2022, #24 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
25	National Capitol Contracting LLC 21 awardees, including Comcast Government Services LLC, Comcast Business Communications, LLC and Comcast of Virginia, LLC Top agencies DCMA (Defense Contract Management Agency) DISA (Defense Information Systems Agency) Navy (Department of the Navy)	$16,312,656	0.7%	Rank history: #26 in FY2022, #18 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
26	SES Government Solutions Inc. 2 awardees, including SES Space & Defense, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$16,252,908	0.7%	Rank history: #24 in FY2022, #11 in FY2023, #19 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
27	Tsymmetry Inc. Top agencies DOS (Department of State)	$15,295,475	0.7%	Rank history: #45 in FY2022, #29 in FY2023, #82 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
28	By Light Professional It Services LLC Through Phacil, LLC Top agencies DISA (Defense Information Systems Agency)	$14,605,621	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
29	Govsmart, Inc. Top agencies SBA (Small Business Administration) NASA (National Aeronautics and Space Administration) HHS (Department of Health and Human Services)	$13,910,184	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
30	Guidehouse Inc. Top agencies HHS (Department of Health and Human Services)	$13,781,185	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
31	HP Enterprise Services LLC 4 awardees, including Knight Point Systems, LLC, Peraton Government Communications Inc. and Onsolve LLC Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) Army (Department of the Army)	$13,516,425	0.6%	Rank history: #9 in FY2022, #6 in FY2023, #38 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
32	Fcn, Inc. Top agencies Treasury (Department of the Treasury) HHS (Department of Health and Human Services) DOE (Department of Energy)	$13,504,003	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
33	Cavalier Telephone L.L.C. 5 awardees, including Windstream Communications, LLC, Windstream Concord Telephone LLC and Windstream New Edge, LLC Top agencies VA (Department of Veterans Affairs) DISA (Defense Information Systems Agency) Navy (Department of the Navy)	$13,140,453	0.6%	Rank history: #76 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
34	Science Applications International Corporation 2 awardees Top agencies DOT (Department of Transportation) Navy (Department of the Navy) USAF (Department of the Air Force)	$12,510,898	0.5%	Rank history: #12 in FY2022, #12 in FY2023, #13 in FY2024 and #15 in FY2025; new, not ranked in FY2020.
35	On Assignment, Inc. Through ECS Federal, LLC Top agencies DOJ (Department of Justice)	$12,183,672	0.5%	Rank history: not on the FY2022 list, #38 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
36	Technica Corporation Top agencies USAF (Department of the Air Force) DOJ (Department of Justice)	$10,877,014	0.5%	Rank history: #34 in FY2022, #64 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
37	Analytic Services Inc. Through Advanced Technology International Top agencies WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$10,736,388	0.5%	Rank history: #19 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
38	CACI International Inc. 2 awardees, including Caci, Inc. - Federal and Caci Nss, LLC Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture)	$10,152,981	0.4%	Rank history: #10 in FY2022, #41 in FY2023, #6 in FY2024 and #2 in FY2025; new, not ranked in FY2020.
39	Bering Straits Native Corporation Through Bering Global Solutions, LLC Top agencies OPM (Office of Personnel Management)	$10,150,338	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
40	Disys Solutions, Inc. Top agencies DHA (Defense Health Agency) Commerce (Department of Commerce) NRC (Nuclear Regulatory Commission)	$10,097,788	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
41	Arlington Capital Partners IV, L.P. 3 awardees, including Tyto Athene, LLC, Tyto Government Solutions Inc. and Mutual Telecom Services Inc. Top agencies Navy (Department of the Navy) DOT (Department of Transportation) DOE (Department of Energy)	$9,971,625	0.4%	Rank history: #65 in FY2022, #83 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
42	Intelsat General Communications LLC Top agencies Army (Department of the Army) DOS (Department of State)	$9,768,708	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies HHS (Department of Health and Human Services) USDA (Department of Agriculture) Navy (Department of the Navy)	$9,545,974	0.4%	Rank history: #23 in FY2022, #26 in FY2023, #43 in FY2024 and #19 in FY2025; new, not ranked in FY2020.
44	Open San Consulting L.L.C. Top agencies OSD (Office of the Secretary of Defense)	$8,591,026	0.4%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
45	V3Gate, LLC Top agencies Treasury (Department of the Treasury) VA (Department of Veterans Affairs)	$8,153,073	0.4%	Rank history: #56 in FY2022, #60 in FY2023, #87 in FY2024 and #90 in FY2025; new, not ranked in FY2020.
46	Beyon B.s.c Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$8,009,928	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
47	Telos Corporation Top agencies USAF (Department of the Air Force)	$6,875,293	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Carahsoft Technology Corp Top agencies DODEA (Department of Defense Education Activity) Commerce (Department of Commerce) DHS (Department of Homeland Security)	$6,826,265	0.3%	Rank history: #35 in FY2022, #73 in FY2023, #70 in FY2024 and #78 in FY2025; new, not ranked in FY2020.
49	Plateau Software, Inc. Top agencies DLA (Defense Logistics Agency)	$6,428,647	0.3%	Rank history: #49 in FY2022, #68 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
50	Huna Totem Corp Through Distributed Computing System Solutions Provider, Inc. Top agencies SEC (Securities and Exchange Commission) Commerce (Department of Commerce)	$6,102,391	0.3%	Rank history: not on the FY2022 list, #85 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
51	Manhattan Telecommunications Corporation LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$5,749,518	0.3%	Rank history: #66 in FY2022, #33 in FY2023, #36 in FY2024 and #100 in FY2025; new, not ranked in FY2020.
52	Delta Bridge, Inc. Top agencies DOS (Department of State) USAID (US Agency for International Development)	$5,718,389	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
53	Leonardo S.p.A. Through Global Enterprise Solutions, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$5,503,710	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
54	Maximus Inc. Through Maximus Federal Services, Inc. Top agencies Treasury (Department of the Treasury)	$5,485,025	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
55	Kupono Government Services, LLC Top agencies Army (Department of the Army)	$4,856,211	0.2%	Rank history: #52 in FY2022, #63 in FY2023, #80 in FY2024 and #75 in FY2025; new, not ranked in FY2020.
56	Leader Communications Inc. Top agencies Army (Department of the Army)	$4,817,369	0.2%	Rank history: #30 in FY2022, #40 in FY2023, #57 in FY2024 and #99 in FY2025; new, not ranked in FY2020.
57	Verizon Business Network Services LLC Top agencies Commerce (Department of Commerce) Navy (Department of the Navy) DNFSB (Defense Nuclear Facilities Safety Board)	$4,685,562	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
58	Telecom Italia SPA Through Telecom Italia SPA O TIM S.P.A. Top agencies Navy (Department of the Navy) Army (Department of the Army) DISA (Defense Information Systems Agency)	$4,532,914	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Deutsche Telekom Business Solutions GMBH 4 awardees, including T-Systems International GMBH, T-Mobile Austria GMBH and Combridge SRL Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$4,207,025	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Gstek, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$4,168,508	0.2%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
61	Sevatec LLC Top agencies GSA (General Services Administration)	$4,124,852	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Logc2 Inc. Top agencies DLA (Defense Logistics Agency)	$4,112,029	0.2%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
63	Vangarde Llc. Top agencies USAF (Department of the Air Force)	$3,744,385	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
64	Avaya Federal Solutions Inc. Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$3,724,948	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
65	Nippon Telegraph and Telephone Corporation 5 awardees, including NTT Docomo, Inc., Docomo Pacific, Inc. and NTT East, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DOS (Department of State)	$3,627,184	0.2%	Rank history: #64 in FY2022, #81 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
66	Team Ronco Incorporated Top agencies DOS (Department of State)	$3,543,898	0.2%	Rank history: #70 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
67	SDA Solutions LLC Top agencies Navy (Department of the Navy)	$3,497,132	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
68	KT Corporation Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$3,428,263	0.1%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
69	T-Mobile US Inc. 3 awardees, including Sprint Communications Co LP and T-Mobile Usa, Inc. Top agencies DHS (Department of Homeland Security) Army (Department of the Army) Navy (Department of the Navy)	$3,402,837	0.1%	Rank history: not on the FY2022 list, #55 in FY2023, #47 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
70	Nova-Dine LLC 2 awardees, including Dine' Source, LLC and North Stone LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$3,389,974	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
71	Norseman Inc. Top agencies DISA (Defense Information Systems Agency)	$3,350,236	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	CA Inc. Top agencies SSA (Social Security Administration)	$3,221,615	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
73	Viasat Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$3,159,886	0.1%	Rank history: #48 in FY2022, #44 in FY2023, #65 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
74	Siemens Aktiengesellschaft 2 awardees, including Siemens Industry Inc. and Mentor Graphics Corporation Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) VA (Department of Veterans Affairs)	$3,075,256	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Thundercat Technology, LLC Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce) USSOCOM (United States Special Operations Command)	$2,995,006	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Idera, Inc. Through Precise Software Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$2,974,601	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Kriaanet Inc. Top agencies USAF (Department of the Air Force)	$2,945,175	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	H.i.g. Capital Management Inc. 2 awardees, including Empower AI, Inc. and Iron Bow Technologies, LLC Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) Army (Department of the Army)	$2,837,628	0.1%	Rank history: not on the FY2022 list, #74 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
79	CDW Corporation Through CDW Government LLC Top agencies DOS (Department of State) USAF (Department of the Air Force) GAO (Government Accountability Office)	$2,802,757	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	BAE Systems PLC Through BAE Systems Technology Solutions & Services Inc. Top agencies DHS (Department of Homeland Security)	$2,774,427	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	MCS of Tampa, Inc. Top agencies SBA (Small Business Administration) USAF (Department of the Air Force)	$2,763,513	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
82	Postpartum Support International Top agencies HHS (Department of Health and Human Services)	$2,695,438	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Fei.com, Inc. Top agencies HHS (Department of Health and Human Services)	$2,667,091	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
84	EPS Corporation Top agencies USAF (Department of the Air Force) SSA (Social Security Administration)	$2,665,605	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
85	CMA Technology Inc. Top agencies DISA (Defense Information Systems Agency)	$2,648,974	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Microsoft Corporation Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) DNFSB (Defense Nuclear Facilities Safety Board)	$2,630,182	0.1%	Rank history: #41 in FY2022, #53 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
87	ACS Messaging, Inc. Top agencies GSA (General Services Administration)	$2,500,000	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
88	Transvoyant LLC. Top agencies Army (Department of the Army)	$2,493,843	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Time Warner Cable Enterprises LLC 8 awardees, including Charter Communications Operating, LLC, Charter Communications Holdings LLC and Bright House Networks, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) VA (Department of Veterans Affairs)	$2,449,591	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Diamond N I LLC Top agencies DOI (Department of the Interior)	$2,425,822	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Aatd LLC Top agencies VA (Department of Veterans Affairs)	$2,418,300	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	DNI Emerging Technologies, LLC Top agencies HHS (Department of Health and Human Services)	$2,408,001	0.1%	Rank history: not on the FY2022–FY2024 lists and #70 in FY2025; new, not ranked in FY2020.
93	Arcticom, LLC Top agencies DISA (Defense Information Systems Agency)	$2,369,876	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
94	Valkyrie Enterprises, LLC Top agencies USAF (Department of the Air Force)	$2,363,119	0.1%	Rank history: #72 in FY2022, #100 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
95	International Business Machines Corporation Top agencies DISA (Defense Information Systems Agency) HHS (Department of Health and Human Services) NARA (National Archives and Records Administration)	$2,361,561	0.1%	Rank history: #88 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
96	Level 3 Communications, LLC Top agencies DISA (Defense Information Systems Agency)	$2,280,853	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Chainbridge Solutions Incorporated Top agencies DODEA (Department of Defense Education Activity)	$2,278,227	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
98	Qualitynet General Trading and Contracting Company WLL Top agencies Army (Department of the Army) DISA (Defense Information Systems Agency)	$2,251,719	0.1%	Rank history: not on the FY2022–FY2023 lists, #97 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
99	Ritenet Corp. Top agencies DISA (Defense Information Systems Agency)	$2,242,037	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
100	International Business Sales and Services Corp Top agencies Commerce (Department of Commerce)	$2,215,703	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 1,001 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC DG

Code	Net obligations	Largest contractor
DG01 IT and Telecom – Network Support Services (Labor)	$997,320,657	Vectrus Systems Corporation
DG11 IT and Telecom – Network: Satellite Communications and Telecom Access Services	$766,910,686	L3Harris Technologies, Inc.
DG10 IT and Telecom – Network as a Service	$281,817,850	Verizon Communications 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 $2.29 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 DG contractors in FY2021?

1. Vectrus Systems Corporation ($183M), 2. At&T Inc. ($142M), 3. General Dynamics Corporation ($132M), 4. Leidos Holdings, Inc. ($125M), 5. Verizon Communications Inc. ($119M), 6. Perspecta Inc. ($92.1M), 7. L3Harris Technologies, Inc. ($89.8M), 8. Lumen Technologies, Inc. ($76.1M), 9. Stratos Government Services, Inc. ($58.9M), 10. BT North America Inc. ($48M).

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