Top 100 Office of Personnel Management Contractors, FY2021

Name: Top 100 Office of Personnel Management Contractors, FY2021
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 64% of FY2021 Office of Personnel Management contract dollars

Contract obligations: $506,943,738 Net of deobligations, by the Office of Personnel Management and its offices
Contractors: 254 Parent companies with an obligation
Largest contractor: Powertrain, Inc. $91.4 million, 15.7% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Powertrain, Inc. Top NAICS codes 541519 Other Computer Related Services 541612 Human Resources Consulting Services	$91,356,716	15.7%	Rank history: #2 in FY2022, #1 in FY2023, #3 in FY2024 and #5 in FY2025; up 1 since FY2020.
2	Identity Theft Guard Solutions, Inc. Top NAICS codes 561450 Credit Bureaus	$68,890,131	11.9%	Rank history: #1 in FY2022, #3 in FY2023, #1 in FY2024 and #2 in FY2025; down 1 since FY2020.
3	International Business Machines Corporation 7 awardees Top NAICS codes 611430 Professional and Management Development Training 541511 Custom Computer Programming Services	$46,523,056	8.0%	Rank history: #42 in FY2022, #28 in FY2023, #23 in FY2024 and #16 in FY2025; up 93 since FY2020.
4	Research Management Consultants Inc. 2 awardees Top NAICS codes 541519 Other Computer Related Services	$32,359,865	5.6%	Rank history: #3 in FY2022, #4 in FY2023, #5 in FY2024 and #3 in FY2025; down 1 since FY2020.
5	Deloitte LLP 2 awardees, including Deloitte Consulting LLP Top NAICS codes 541612 Human Resources Consulting Services 541219 Other Accounting Services 611430 Professional and Management Development Training	$31,209,852	5.4%	Rank history: #21 in FY2022, #2 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
6	Science Applications International Corporation Top NAICS codes 541612 Human Resources Consulting Services	$27,738,882	4.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
7	Bering Straits Native Corporation Through Bering Global Solutions, LLC Top NAICS codes 541513 Computer Facilities Management Services	$26,671,472	4.6%	Rank history: #4 in FY2022, #7 in FY2023, #17 in FY2024 and #1 in FY2025; down 1 since FY2020.
8	Aptive Resources LLC Top NAICS codes 541613 Marketing Consulting Services	$20,879,246	3.6%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
9	Govsmart, Inc. Top NAICS codes 541519 Other Computer Related Services	$13,830,035	2.4%	Rank history: #7 in FY2022, #11 in FY2023, #14 in FY2024 and #20 in FY2025; down 5 since FY2020.
10	Gartner, Inc. 2 awardees, including Personnel Decisions Research Institutes, LLC Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services 541519 Other Computer Related Services	$12,906,908	2.2%	Rank history: #11 in FY2022, #6 in FY2023, #99 in FY2024 and not on the FY2025 list; up 1 since FY2020.
11	Countertrade Products, Inc. Top NAICS codes 541519 Other Computer Related Services	$11,911,409	2.0%	Rank history: #33 in FY2022, #40 in FY2023, #44 in FY2024 and #24 in FY2025; down 2 since FY2020.
12	Federal Management Partners, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541612 Human Resources Consulting Services	$10,922,897	1.9%	Rank history: #10 in FY2022, #13 in FY2023, #10 in FY2024 and #12 in FY2025; down 4 since FY2020.
13	Mythics, LLC 2 awardees, including Emergent, LLC Top NAICS codes 334111 Electronic Computer Manufacturing	$9,873,681	1.7%	Rank history: #26 in FY2022, #32 in FY2023, #82 in FY2024 and not on the FY2025 list; up 95 since FY2020.
14	PBG Consulting, LLC Top NAICS codes 541511 Custom Computer Programming Services	$9,802,167	1.7%	Rank history: #8 in FY2022, #12 in FY2023, #8 in FY2024 and #52 in FY2025; new, not ranked in FY2020.
15	Nana Regional Corporation Inc 2 awardees, including Tundra Federal LLC and Affigent, LLC Top NAICS codes 541519 Other Computer Related Services	$9,787,807	1.7%	Rank history: #18 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
16	Minburn Technology Group, LLC Top NAICS codes 511210 Software Publishers	$9,346,559	1.6%	Rank history: #14 in FY2022, #15 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
17	Xgility, LLC Top NAICS codes 541511 Custom Computer Programming Services	$8,772,800	1.5%	Rank history: #32 in FY2022, #22 in FY2023, #26 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
18	Cybermedia Technologies, LLC Top NAICS codes 541511 Custom Computer Programming Services	$8,038,934	1.4%	Rank history: #9 in FY2022, #20 in FY2023, #25 in FY2024 and #13 in FY2025; down 6 since FY2020.
19	Accenture Federal Services LLC Top NAICS codes 541612 Human Resources Consulting Services	$6,659,451	1.1%	Rank history: #12 in FY2022, #8 in FY2023 and not on the FY2024–FY2025 lists; up 55 since FY2020.
20	Digital Management LLC Top NAICS codes 541519 Other Computer Related Services	$5,435,465	0.9%	Rank history: #22 in FY2022, #21 in FY2023, #31 in FY2024 and #19 in FY2025; unchanged since FY2020.
21	Thundercat Technology, LLC Top NAICS codes 541519 Other Computer Related Services	$3,863,691	0.7%	Rank history: #24 in FY2022, #38 in FY2023, #39 in FY2024 and #95 in FY2025; up 3 since FY2020.
22	Vastec Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$3,797,154	0.7%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; up 97 since FY2020.
23	The Prospective Group, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$3,413,052	0.6%	Rank history: #19 in FY2022, #29 in FY2023, #32 in FY2024 and #18 in FY2025; up 6 since FY2020.
24	Fcn, Inc. Top NAICS codes 541519 Other Computer Related Services	$3,244,202	0.6%	Rank history: #28 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; up 52 since FY2020.
25	Northrop Grumman Corporation 2 awardees, including Northrop Grumman Systems Corporation Top NAICS codes 541519 Other Computer Related Services	$2,804,421	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	World Services LLC Top NAICS codes 541512 Computer Systems Design Services	$2,699,685	0.5%	Rank history: not on the FY2022 list, #43 in FY2023, #96 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
27	Aatd LLC Top NAICS codes 541519 Other Computer Related Services	$2,659,397	0.5%	Rank history: not on the FY2022 list, #71 in FY2023, #66 in FY2024 and not on the FY2025 list; up 194 since FY2020.
28	CMA Technology Inc. Top NAICS codes 541519 Other Computer Related Services	$2,548,454	0.4%	Rank history: #25 in FY2022, #42 in FY2023, #45 in FY2024 and #64 in FY2025; up 7 since FY2020.
29	M2 Technology, Inc. Top NAICS codes 541519 Other Computer Related Services	$2,425,818	0.4%	Rank history: #23 in FY2022, #31 in FY2023, #43 in FY2024 and #29 in FY2025; down 2 since FY2020.
30	KR Contracting Inc. Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$2,346,351	0.4%	Rank history: #31 in FY2022, #30 in FY2023, #57 in FY2024 and #31 in FY2025; up 32 since FY2020.
31	Washington Business Dynamics, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,340,616	0.4%	Rank history: #40 in FY2022, #52 in FY2023 and not on the FY2024–FY2025 lists; up 32 since FY2020.
32	Coforma LLC Top NAICS codes 541519 Other Computer Related Services 541512 Computer Systems Design Services	$2,174,915	0.4%	Rank history: #29 in FY2022, #45 in FY2023, #33 in FY2024 and #26 in FY2025; up 2 since FY2020.
33	Success Business Incorporated Top NAICS codes 611430 Professional and Management Development Training	$2,061,021	0.4%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
34	Thinktek LLC Top NAICS codes 541519 Other Computer Related Services	$1,986,272	0.3%	Rank history: #35 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
35	Unissant Inc. Top NAICS codes 541519 Other Computer Related Services 541512 Computer Systems Design Services	$1,829,857	0.3%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; up 40 since FY2020.
36	Maximus Inc. Through Maximus Federal Services, Inc. Top NAICS codes 561439 Other Business Service Centers (including Copy Shops)	$1,643,094	0.3%	Rank history: #30 in FY2022, #33 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2020.
37	Mercom, Incorporated Top NAICS codes 541519 Other Computer Related Services	$1,620,331	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	Grant Thornton International Ltd Through Grant Thornton LLP Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,602,821	0.3%	Rank history: #37 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; up 34 since FY2020.
39	CMI Management, LLC Top NAICS codes 561210 Facilities Support Services	$1,547,144	0.3%	Rank history: #34 in FY2022, #27 in FY2023, #28 in FY2024 and not on the FY2025 list; up 11 since FY2020.
40	C2 Technologies, Inc. Top NAICS codes 541612 Human Resources Consulting Services	$1,474,694	0.3%	Rank history: #100 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
41	Wichita Tribe Industrial Development Commission Through Wichita Tribal Enterprises, LLC Top NAICS codes 541519 Other Computer Related Services	$1,456,922	0.3%	Rank history: #41 in FY2022, #50 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2020.
42	Ad Hoc LLC Top NAICS codes 541511 Custom Computer Programming Services	$1,374,752	0.2%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
43	Lumen Technologies, Inc. 6 awardees, including Lumen Technologies Government Solutions, Inc. and The United Telephone Company of Pennsylvania Llc Top NAICS codes 517110 Wired Telecommunications Carriers 517311 Wired Telecommunications Carriers	$1,287,581	0.2%	Rank history: #27 in FY2022, #34 in FY2023, #35 in FY2024 and #23 in FY2025; new, not ranked in FY2020.
44	Visions Strategic Marketing LLC Top NAICS codes 541519 Other Computer Related Services 811212 Computer and Office Machine Repair and Maintenance	$1,273,617	0.2%	Rank history: #45 in FY2022, #55 in FY2023, #65 in FY2024 and #71 in FY2025; unchanged since FY2020.
45	Four LLC Top NAICS codes 541519 Other Computer Related Services	$1,221,535	0.2%	Rank history: #13 in FY2022, #16 in FY2023, #12 in FY2024 and #10 in FY2025; down 40 since FY2020.
46	Alvarez LLC Top NAICS codes 541519 Other Computer Related Services	$1,206,501	0.2%	Rank history: #65 in FY2022, #77 in FY2023, #69 in FY2024 and not on the FY2025 list; down 32 since FY2020.
47	Exelon Corporation Through Potomac Electric Power Co Top NAICS codes 221122 Electric Power Distribution	$1,201,853	0.2%	Rank history: #62 in FY2022, #72 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
48	Clark Enterprises, Inc. Through CEG Solutions LLC Top NAICS codes 541330 Engineering Services	$1,196,779	0.2%	Rank history: #44 in FY2022 and not on the FY2023–FY2025 lists; down 1 since FY2020.
49	TMP Government LLC Top NAICS codes 541810 Advertising Agencies	$1,196,357	0.2%	Rank history: #50 in FY2022, #39 in FY2023 and not on the FY2024–FY2025 lists; up 30 since FY2020.
50	American Green Building Maintenance, Inc. Top NAICS codes 561720 Janitorial Services	$1,138,013	0.2%	Rank history: #51 in FY2022 and not on the FY2023–FY2025 lists; up 98 since FY2020.
51	SHI International Corp Top NAICS codes 541519 Other Computer Related Services 334113 Computer Terminal Manufacturing	$1,129,078	0.2%	Rank history: not on the FY2022–FY2025 lists; up 100 since FY2020.
52	Health Services Holdings Inc. Through Health Services Advisory Group, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,073,933	0.2%	Rank history: #59 in FY2022, #78 in FY2023, #73 in FY2024 and not on the FY2025 list; up 69 since FY2020.
53	Iron Mountain Incorporated 3 awardees, including Iron Mountain Information Management LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 485999 All Other Transit and Ground Passenger Transportation 541519 Other Computer Related Services	$1,058,227	0.2%	Rank history: #48 in FY2022, #56 in FY2023, #54 in FY2024 and #47 in FY2025; unchanged since FY2020.
54	At&T Inc. 7 awardees, including Att Mobility LLC and Southwestern Bell Telephone Company Top NAICS codes 541519 Other Computer Related Services	$1,009,102	0.2%	Rank history: #68 in FY2022, #51 in FY2023, #22 in FY2024 and #70 in FY2025; up 7 since FY2020.
55	Westat, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$998,114	0.2%	Rank history: #52 in FY2022, #65 in FY2023, #64 in FY2024 and #41 in FY2025; up 4 since FY2020.
56	Vae, Inc. Top NAICS codes 541519 Other Computer Related Services	$983,356	0.2%	Rank history: #56 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
57	Easter Seals Western & Central Pennsylvania Top NAICS codes 561210 Facilities Support Services	$972,308	0.2%	Rank history: #53 in FY2022, not on the FY2023 list, #74 in FY2024 and #35 in FY2025; down 8 since FY2020.
58	Action Facilities Management Inc. Top NAICS codes 561210 Facilities Support Services	$941,773	0.2%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; down 3 since FY2020.
59	The Data Entry Company Top NAICS codes 561499 All Other Business Support Services	$864,094	0.1%	Rank history: #64 in FY2022, #61 in FY2023 and not on the FY2024–FY2025 lists; up 218 since FY2020.
60	Dynamis, Inc. Top NAICS codes 541612 Human Resources Consulting Services	$849,745	0.1%	Rank history: #46 in FY2022, #53 in FY2023, #50 in FY2024 and #37 in FY2025; up 8 since FY2020.
61	Advanced Computer Concepts, Inc. Top NAICS codes 541519 Other Computer Related Services	$832,786	0.1%	Rank history: #86 in FY2022, not on the FY2023–FY2024 lists and #85 in FY2025; up 4 since FY2020.
62	Reveal Global Consulting LLC Top NAICS codes 541519 Other Computer Related Services	$781,822	0.1%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
63	Pitney Bowes Inc. 2 awardees, including The Pitney Bowes Bank. Inc. Top NAICS codes 453210 Office Supplies and Stationery Stores 333298 All Other Industrial Machinery Manufacturing	$740,898	0.1%	Rank history: #88 in FY2022, #44 in FY2023, #81 in FY2024 and #55 in FY2025; new, not ranked in FY2020.
64	Wichita Tribal Enterprises, LLC Top NAICS codes 541519 Other Computer Related Services	$726,601	0.1%	Rank history: not on the FY2022 list, #70 in FY2023, #47 in FY2024 and #56 in FY2025; new, not ranked in FY2020.
65	Agility Technologies Inc. Top NAICS codes 541512 Computer Systems Design Services	$692,594	0.1%	Rank history: not on the FY2022–FY2025 lists; down 11 since FY2020.
66	Guidehouse Inc. Top NAICS codes 541612 Human Resources Consulting Services	$686,210	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Corporate Mailing Services, Inc.	$630,139	0.1%	Rank history: #69 in FY2022, #74 in FY2023, #77 in FY2024 and #54 in FY2025; up 155 since FY2020.
68	Triad Technology Partners LLC Top NAICS codes 511210 Software Publishers	$611,245	0.1%	Rank history: #71 in FY2022 and not on the FY2023–FY2025 lists; up 15 since FY2020.
69	A P Ventures, LLC Top NAICS codes 611430 Professional and Management Development Training	$608,015	0.1%	Rank history: not on the FY2022–FY2025 lists; down 27 since FY2020.
70	Insight Public Sector Inc. Top NAICS codes 541519 Other Computer Related Services	$589,507	0.1%	Rank history: #61 in FY2022, #63 in FY2023, #59 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
71	Sikich Federal Inc. Top NAICS codes 541512 Computer Systems Design Services	$519,077	0.1%	Rank history: #66 in FY2022 and not on the FY2023–FY2025 lists; down 19 since FY2020.
72	Externetworks Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$500,000	0.1%	Rank history: #82 in FY2022, #68 in FY2023, not on the FY2024 list and #49 in FY2025; new, not ranked in FY2020.
73	New TECH Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$497,617	0.1%	Rank history: #57 in FY2022, #25 in FY2023, #40 in FY2024 and #34 in FY2025; up 41 since FY2020.
74	Compuware Corporation Top NAICS codes 511210 Software Publishers	$482,090	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
75	Redhawk It Solutions, LLC Top NAICS codes 541519 Other Computer Related Services	$479,818	0.1%	Rank history: #90 in FY2022, not on the FY2023–FY2024 lists and #73 in FY2025; down 18 since FY2020.
76	The Mitre Corporation Top NAICS codes 541618 Other Management Consulting Services	$474,944	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
77	ABM Federal Sales, Inc. Top NAICS codes 541519 Other Computer Related Services	$473,575	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
78	Dbisp LLC Top NAICS codes 334118 Computer Terminal and Other Computer Peripheral Equipment Manufacturing	$473,378	0.1%	Rank history: not on the FY2022–FY2025 lists; down 47 since FY2020.
79	Executive Information Systems, L.L.C. Top NAICS codes 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing	$468,699	0.1%	Rank history: #91 in FY2022, #90 in FY2023, #93 in FY2024 and #63 in FY2025; up 7 since FY2020.
80	Westwind Computer Products, Inc. Top NAICS codes 541519 Other Computer Related Services	$450,000	0.1%	Rank history: #98 in FY2022, not on the FY2023 list, #56 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
81	Worksource Enterprises Top NAICS codes 561720 Janitorial Services	$437,574	0.1%	Rank history: #60 in FY2022, #69 in FY2023, #67 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
82	OK2 Construction, LLC Top NAICS codes 236220 Commercial and Institutional Building Construction	$431,448	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
83	Georgia Power Company Top NAICS codes 221122 Electric Power Distribution	$424,737	0.1%	Rank history: #92 in FY2022, #87 in FY2023, #78 in FY2024 and #61 in FY2025; up 26 since FY2020.
84	Vanguard Integrity Professionals Inc. 2 awardees, including Vanguard Integrity Professionals - Nevada Top NAICS codes 511210 Software Publishers 541519 Other Computer Related Services	$422,062	0.1%	Rank history: #79 in FY2022, #95 in FY2023, #97 in FY2024 and #98 in FY2025; up 6 since FY2020.
85	ATS Associates LLC Top NAICS codes 541519 Other Computer Related Services	$385,383	0.1%	Rank history: #84 in FY2022, #85 in FY2023, #85 in FY2024 and not on the FY2025 list; up 43 since FY2020.
86	Signet Technologies Inc. Top NAICS codes 561621 Security Systems Services (except Locksmiths) 334512 Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use	$365,223	0.1%	Rank history: not on the FY2022–FY2025 lists; up 29 since FY2020.
87	Government of the United States 5 awardees, including DLA Document Services Top NAICS codes 323117 Books Printing	$358,775	0.1%	Rank history: not on the FY2022–FY2025 lists; up 37 since FY2020.
88	Innovative Networking Technology, Inc. Top NAICS codes 541511 Custom Computer Programming Services	$346,334	0.1%	Rank history: not on the FY2022–FY2025 lists; up 90 since FY2020.
89	Kpaul Properties LLC Top NAICS codes 541519 Other Computer Related Services	$343,845	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	Unistar-Sparco Computers, Inc. Top NAICS codes 541519 Other Computer Related Services	$327,860	0.1%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
91	Intelipath Services Group Inc. Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$318,383	0.1%	Rank history: #93 in FY2022 and not on the FY2023–FY2025 lists; up 27 since FY2020.
92	Blue TECH Inc. Top NAICS codes 541519 Other Computer Related Services	$316,569	0.1%	Rank history: #94 in FY2022 and not on the FY2023–FY2025 lists; up 65 since FY2020.
93	Quality Elevator Co., LLC Top NAICS codes 561210 Facilities Support Services	$293,943	0.1%	Rank history: #81 in FY2022, #97 in FY2023, #98 in FY2024 and #67 in FY2025; up 8 since FY2020.
94	Pennsylvania Medical Society Through Keystone Peer Review Organization, LLC Top NAICS codes 524298 All Other Insurance Related Activities	$273,000	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	PFD Mechanical, Inc. Top NAICS codes 238210 Electrical Contractors and Other Wiring Installation Contractors	$235,947	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 22 since FY2020.
96	Tyler Federal, LLC Top NAICS codes 511210 Software Publishers	$232,796	<0.1%	Rank history: not on the FY2022–FY2025 lists; up 16 since FY2020.
97	Enterprise Technology Solutions, Inc. Top NAICS codes 541519 Other Computer Related Services	$227,882	<0.1%	Rank history: not on the FY2022–FY2023 lists, #88 in FY2024 and #75 in FY2025; up 28 since FY2020.
98	Bloomsburie LLC Top NAICS codes 611430 Professional and Management Development Training	$225,955	<0.1%	Rank history: #95 in FY2022, #47 in FY2023, #48 in FY2024 and #83 in FY2025; new, not ranked in FY2020.
99	4 Star Technologies, Inc. Top NAICS codes 541519 Other Computer Related Services	$217,458	<0.1%	Rank history: not on the FY2022 list, #98 in FY2023, #100 in FY2024 and not on the FY2025 list; down 22 since FY2020.
100	United States Postal Service 2 awardees Top NAICS codes 491110 Postal Service	$197,895	<0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 254 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 $581 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 Office of Personnel Management contractors in FY2021?

1. Powertrain, Inc. ($91.4M), 2. Identity Theft Guard Solutions, Inc. ($68.9M), 3. International Business Machines Corporation ($46.5M), 4. Research Management Consultants Inc. ($32.4M), 5. Deloitte LLP ($31.2M), 6. Science Applications International Corporation ($27.7M), 7. Bering Straits Native Corporation ($26.7M), 8. Aptive Resources LLC ($20.9M), 9. Govsmart, Inc. ($13.8M), 10. Gartner, Inc. ($12.9M).

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