Top 100 Defense Human Resources Activity Contractors, Aug 2025–Jul 2026

Name: Top 100 Defense Human Resources Activity Contractors, Aug 2025–Jul 2026
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Aug 1, 2025 – Jul 31, 2026 Agency page on GovTribe

The latest 12 months. See the newest fiscal year's list: Top Defense Human Resources Activity Contractors, FY2025.

The top 10 won 70% of Defense Human Resources Activity contract dollars from August 2025 through July 2026

Contract obligations: $883,642,030 Net of deobligations, by the Defense Human Resources Activity and its offices
Contractors: 163 Parent companies with an obligation
Largest contractor: Deloitte $281 million, 30.7% of obligations
Data as of: Nov 5, 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	Deloitte Through Deloitte Consulting LLP Top NAICS codes 541512 Computer Systems Design Services 541330 Engineering Services 541611 Administrative Management and General Management Consulting Services	$280,706,005	30.7%	Rank history: not on the FY2021–FY2023 lists, #3 in FY2024 and #1 in FY2025; unchanged since Aug 2024–Jul 2025.
2	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services 541611 Administrative Management and General Management Consulting Services	$60,736,234	6.6%	Rank history: #12 in FY2021, #8 in FY2022, #10 in FY2023, #7 in FY2024 and #4 in FY2025; up 2 since Aug 2024–Jul 2025.
3	The Interpublic Group of Companies Inc Through Mullenlowe US Inc. Top NAICS codes 541810 Advertising Agencies	$55,434,798	6.1%	Rank history: not on the FY2021–FY2023 lists, #4 in FY2024 and #3 in FY2025; unchanged since Aug 2024–Jul 2025.
4	Peraton Inc. 2 awardees, including Peraton Enterprise Solutions LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541512 Computer Systems Design Services 541720 Research and Development in the Social Sciences and Humanities	$49,039,397	5.4%	Rank history: not on the FY2021–FY2023 lists, #2 in FY2024 and #2 in FY2025; down 2 since Aug 2024–Jul 2025.
5	Leidos Holdings, Inc. 3 awardees, including Leidos, Inc. Top NAICS codes 541512 Computer Systems Design Services	$38,510,209	4.2%	Rank history: #7 in FY2021, #4 in FY2022, #4 in FY2023, #13 in FY2024 and #6 in FY2025; up 6 since Aug 2024–Jul 2025.
6	Xtec, Incorporated Top NAICS codes 334111 Electronic Computer Manufacturing	$37,141,319	4.1%	Rank history: #20 in FY2021, #7 in FY2022, #7 in FY2023, #18 in FY2024 and #7 in FY2025; up 4 since Aug 2024–Jul 2025.
7	Institute of International Education Inc. Top NAICS codes 611710 Educational Support Services	$33,370,809	3.6%	Rank history: #6 in FY2021, #6 in FY2022, #3 in FY2023, #5 in FY2024 and #9 in FY2025; unchanged since Aug 2024–Jul 2025.
8	Human Resources Research Organization (Humrro) Top NAICS codes 611710 Educational Support Services	$32,562,310	3.6%	Rank history: #11 in FY2021, #5 in FY2022, #5 in FY2023, #6 in FY2024 and #5 in FY2025; down 3 since Aug 2024–Jul 2025.
9	Fors Marsh Group LLC Top NAICS codes 541720 Research and Development in the Social Sciences and Humanities	$29,792,441	3.3%	Rank history: #9 in FY2021, #9 in FY2022, #9 in FY2023, #8 in FY2024 and #8 in FY2025; down 1 since Aug 2024–Jul 2025.
10	Guidehouse Inc. 2 awardees, including Peraton Inc. Top NAICS codes 541511 Custom Computer Programming Services 541512 Computer Systems Design Services	$25,930,986	2.8%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
11	Clearavenue LLC Top NAICS codes 541519 Other Computer Related Services	$19,835,835	2.2%	Rank history: not on the FY2021–FY2024 lists and #17 in FY2025; new, not ranked in Aug 2024–Jul 2025.
12	Arctic Slope Regional Corporation Through Netcentric Technology, LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$19,761,470	2.2%	Rank history: #16 in FY2021, #14 in FY2022, #19 in FY2023, #10 in FY2024 and #14 in FY2025; down 3 since Aug 2024–Jul 2025.
13	E.f. Kearney, Limited Through Kearney & Company, P.C. Top NAICS codes 541211 Offices of Certified Public Accountants	$12,939,440	1.4%	Rank history: not on the FY2021–FY2024 lists and #11 in FY2025; up 1 since Aug 2024–Jul 2025.
14	Rei Systems, Inc. Top NAICS codes 541512 Computer Systems Design Services	$12,647,459	1.4%	Rank history: #17 in FY2021, #10 in FY2022, #13 in FY2023, #14 in FY2024 and #10 in FY2025; down 1 since Aug 2024–Jul 2025.
15	Rape, Abuse and Incest National Network Rainn Top NAICS codes 624190 Other Individual and Family Services	$11,053,459	1.2%	Rank history: #26 in FY2021, #15 in FY2022, #15 in FY2023, #17 in FY2024 and #13 in FY2025; unchanged since Aug 2024–Jul 2025.
16	Guidehouse Digital LLC Top NAICS codes 541512 Computer Systems Design Services	$10,136,054	1.1%	Rank history: not on the FY2021–FY2024 lists and #12 in FY2025; new, not ranked in Aug 2024–Jul 2025.
17	Asgn Incorporated 2 awardees, including Indrasoft Inc. and ECS Federal, LLC Top NAICS codes 541519 Other Computer Related Services 541330 Engineering Services	$9,018,947	1.0%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and #15 in FY2025; up 16 since Aug 2024–Jul 2025.
18	Oracle Health Government Services Inc. Through Oracle America, Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$8,416,881	0.9%	Rank history: not on the FY2021–FY2023 lists, #90 in FY2024 and #18 in FY2025; unchanged since Aug 2024–Jul 2025.
19	Carahsoft Technology Corp Top NAICS codes 511210 Software Publishers 513210 Software Publishers	$8,205,499	0.9%	Rank history: not on the FY2021–FY2022 lists, #61 in FY2023, not on the FY2024 list and #19 in FY2025; up 4 since Aug 2024–Jul 2025.
20	Inspiritec Inc. Top NAICS codes 561422 Telemarketing Bureaus and Other Contact Centers	$6,742,792	0.7%	Rank history: #10 in FY2021, #11 in FY2022, #8 in FY2023, #1 in FY2024 and not on the FY2025 list; down 14 since Aug 2024–Jul 2025.
21	Goldbelt, Incorporated Through Goldbelt Apex, LLC Top NAICS codes 541511 Custom Computer Programming Services	$5,865,513	0.6%	Rank history: #36 in FY2021, #37 in FY2022, not on the FY2023–FY2024 lists and #21 in FY2025; new, not ranked in Aug 2024–Jul 2025.
22	American Council On Education Top NAICS codes 611710 Educational Support Services	$5,810,842	0.6%	Rank history: #24 in FY2021, #32 in FY2022, #25 in FY2023, #30 in FY2024 and #30 in FY2025; up 19 since Aug 2024–Jul 2025.
23	National Opinion Research Center Top NAICS codes 541720 Research and Development in the Social Sciences and Humanities	$5,596,002	0.6%	Rank history: #29 in FY2021, #23 in FY2022, #21 in FY2023, #27 in FY2024 and #24 in FY2025; up 4 since Aug 2024–Jul 2025.
24	Tripoint Solutions, LLC Top NAICS codes 541512 Computer Systems Design Services	$4,941,808	0.5%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; up 5 since Aug 2024–Jul 2025.
25	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top NAICS codes 541512 Computer Systems Design Services	$4,767,120	0.5%	Rank history: #59 in FY2021, #24 in FY2022, #24 in FY2023, #22 in FY2024 and #23 in FY2025; up 6 since Aug 2024–Jul 2025.
26	Data Recognition Corporation Top NAICS codes 541910 Marketing Research and Public Opinion Polling	$4,568,389	0.5%	Rank history: #21 in FY2021, #25 in FY2022, #20 in FY2023, #41 in FY2024 and #22 in FY2025; up 6 since Aug 2024–Jul 2025.
27	Aderas Inc. Top NAICS codes 541512 Computer Systems Design Services	$4,223,867	0.5%	Rank history: not on the FY2021 list, #30 in FY2022, #28 in FY2023, #32 in FY2024 and #31 in FY2025; up 9 since Aug 2024–Jul 2025.
28	Exponent Inc. Top NAICS codes 541330 Engineering Services	$4,099,096	0.4%	Rank history: #44 in FY2021, #42 in FY2022, #66 in FY2023, #35 in FY2024 and #37 in FY2025; up 15 since Aug 2024–Jul 2025.
29	Cherokee Nation Defense Solutions LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$4,005,773	0.4%	Rank history: not on the FY2021–FY2024 lists and #59 in FY2025; new, not ranked in Aug 2024–Jul 2025.
30	Dell Technologies Inc. Through Dell Federal Systems L.P Top NAICS codes 511210 Software Publishers 513210 Software Publishers	$3,940,715	0.4%	Rank history: not on the FY2021–FY2023 lists, #46 in FY2024 and #41 in FY2025; up 16 since Aug 2024–Jul 2025.
31	Crisis24 Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$3,677,047	0.4%	Rank history: not on the FY2021–FY2023 lists, #37 in FY2024 and #35 in FY2025; up 7 since Aug 2024–Jul 2025.
32	Acuity-Chs, LLC Top NAICS codes 621111 Offices of Physicians (except Mental Health Specialists)	$3,099,288	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
33	Edgewater Federal Solutions, Inc. Top NAICS codes 561422 Telemarketing Bureaus and Other Contact Centers	$3,091,837	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
34	Nana Regional Corporation Inc. Through Lockwood Hills Federal LLC Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$2,882,110	0.3%	Rank history: not on the FY2021–FY2023 lists, #25 in FY2024 and #16 in FY2025; down 14 since Aug 2024–Jul 2025.
35	Amazon Web Services, Inc. Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$2,729,179	0.3%	Rank history: not on the FY2021–FY2023 lists, #59 in FY2024 and #49 in FY2025; up 27 since Aug 2024–Jul 2025.
36	Thinktek LLC Top NAICS codes 541519 Other Computer Related Services	$2,655,866	0.3%	Rank history: not on the FY2021–FY2024 lists and #57 in FY2025; new, not ranked in Aug 2024–Jul 2025.
37	Robert D. Niehaus, Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$2,446,776	0.3%	Rank history: #52 in FY2021, #56 in FY2022, #51 in FY2023, #66 in FY2024 and #43 in FY2025; up 20 since Aug 2024–Jul 2025.
38	Peterson's, LLC Top NAICS codes 611699 All Other Miscellaneous Schools and Instruction	$2,410,496	0.3%	Rank history: not on the FY2021–FY2023 lists, #51 in FY2024 and #72 in FY2025; up 58 since Aug 2024–Jul 2025.
39	Precise Systems, Inc. Through Jardon & Howard Technologies LLC Top NAICS codes 541512 Computer Systems Design Services	$2,256,241	0.2%	Rank history: not on the FY2021–FY2024 lists and #34 in FY2025; new, not ranked in Aug 2024–Jul 2025.
40	CACI International Inc. Through Caci, Inc. - Federal Top NAICS codes 561422 Telemarketing Bureaus and Other Contact Centers	$2,089,300	0.2%	Rank history: #19 in FY2021, #17 in FY2022, #17 in FY2023, #20 in FY2024 and not on the FY2025 list; down 21 since Aug 2024–Jul 2025.
41	Cherokee Nation Through Cherokee Nation Defense Solutions LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,962,701	0.2%	Rank history: #42 in FY2021, #39 in FY2022, #36 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
42	Amananet, Inc. Top NAICS codes 611430 Professional and Management Development Training	$1,834,260	0.2%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; up 56 since Aug 2024–Jul 2025.
43	Chugach Alaska Corporation Through Chugach Dynamic Solutions LLC Top NAICS codes 541512 Computer Systems Design Services	$1,696,283	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
44	The Joachim Group, Cpa's & Consultants, LLC Top NAICS codes 541219 Other Accounting Services	$1,664,324	0.2%	Rank history: not on the FY2021–FY2023 lists, #57 in FY2024 and #51 in FY2025; up 9 since Aug 2024–Jul 2025.
45	2Techjv, LLC Top NAICS codes 541512 Computer Systems Design Services	$1,641,789	0.2%	Rank history: not on the FY2021–FY2024 lists and #54 in FY2025; up 16 since Aug 2024–Jul 2025.
46	Gentech Associates Inc. Top NAICS codes 541211 Offices of Certified Public Accountants	$1,609,554	0.2%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023, #71 in FY2024 and #60 in FY2025; up 22 since Aug 2024–Jul 2025.
47	Delany Siegel Zorn & Associates Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,491,480	0.2%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023, #78 in FY2024 and #55 in FY2025; up 20 since Aug 2024–Jul 2025.
48	Lucayan Technology Solutions LLC Top NAICS codes 541512 Computer Systems Design Services	$1,453,815	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
49	Government Acquisitions LLC Top NAICS codes 541519 Other Computer Related Services	$1,450,000	0.2%	Rank history: not on the FY2021–FY2024 lists and #63 in FY2025; up 99 since Aug 2024–Jul 2025.
50	Centene Corporation Through Magellan Federal, Inc. Top NAICS codes 624190 Other Individual and Family Services	$1,448,501	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
51	Vantage Point Consulting Inc. Top NAICS codes 611699 All Other Miscellaneous Schools and Instruction	$1,444,802	0.2%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2023, #98 in FY2024 and #96 in FY2025; up 46 since Aug 2024–Jul 2025.
52	Capella Partners LLC Top NAICS codes 541511 Custom Computer Programming Services	$1,433,480	0.2%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023, #67 in FY2024 and #56 in FY2025; up 13 since Aug 2024–Jul 2025.
53	College Entrance Examination Board 2 awardees Top NAICS codes 611710 Educational Support Services	$1,298,243	0.1%	Rank history: #35 in FY2021, #49 in FY2022, #43 in FY2023, #60 in FY2024 and #42 in FY2025; up 5 since Aug 2024–Jul 2025.
54	Azoole LLC Top NAICS codes 541512 Computer Systems Design Services	$1,287,805	0.1%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2023, #70 in FY2024 and #58 in FY2025; up 12 since Aug 2024–Jul 2025.
55	Patrona Corporation Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,280,901	0.1%	Rank history: not on the FY2021–FY2023 lists, #38 in FY2024 and #36 in FY2025; down 13 since Aug 2024–Jul 2025.
56	Vistra Communications, LLC Top NAICS codes 541613 Marketing Consulting Services	$1,245,864	0.1%	Rank history: not on the FY2021–FY2023 lists, #74 in FY2024 and #77 in FY2025; up 15 since Aug 2024–Jul 2025.
57	Applied Development, LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$1,226,286	0.1%	Rank history: #48 in FY2021, #45 in FY2022, #38 in FY2023, #47 in FY2024 and #47 in FY2025; down 2 since Aug 2024–Jul 2025.
58	Transtecs Corporation Top NAICS codes 541614 Process, Physical Distribution, and Logistics Consulting Services	$1,190,856	0.1%	Rank history: #95 in FY2021, #95 in FY2022, #90 in FY2023, not on the FY2024 list and #53 in FY2025; down 4 since Aug 2024–Jul 2025.
59	Cloud7Works, Inc. Top NAICS codes 541511 Custom Computer Programming Services	$1,185,134	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
60	Redwood Strategy Group Inc. Top NAICS codes 541219 Other Accounting Services	$1,161,216	0.1%	Rank history: not on the FY2021–FY2023 lists, #53 in FY2024 and #46 in FY2025; down 11 since Aug 2024–Jul 2025.
61	Sterling Computers Corporation Top NAICS codes 541519 Other Computer Related Services	$1,154,626	0.1%	Rank history: #74 in FY2021, #79 in FY2022, #55 in FY2023, #63 in FY2024 and #88 in FY2025; up 12 since Aug 2024–Jul 2025.
62	Accenture Federal Services LLC Through ASM Research, LLC Top NAICS codes 541512 Computer Systems Design Services	$1,022,136	0.1%	Rank history: not on the FY2021–FY2023 lists, #42 in FY2024 and #32 in FY2025; down 27 since Aug 2024–Jul 2025.
63	National Organization for Victim Assistance, Inc. Top NAICS codes 611430 Professional and Management Development Training	$1,011,750	0.1%	Rank history: #73 in FY2021, #67 in FY2022, #64 in FY2023, #72 in FY2024 and #64 in FY2025; up 7 since Aug 2024–Jul 2025.
64	Hope Services Top NAICS codes 561720 Janitorial Services	$1,007,219	0.1%	Rank history: #82 in FY2021, #80 in FY2022, #78 in FY2023, #82 in FY2024 and #66 in FY2025; down 5 since Aug 2024–Jul 2025.
65	Prometric LLC Top NAICS codes 611710 Educational Support Services	$981,213	0.1%	Rank history: not on the FY2021–FY2023 lists, #94 in FY2024 and #62 in FY2025; up 13 since Aug 2024–Jul 2025.
66	Software Information Resource Corp Top NAICS codes 541519 Other Computer Related Services	$961,911	0.1%	Rank history: not on the FY2021–FY2023 lists, #80 in FY2024 and not on the FY2025 list; new, not ranked in Aug 2024–Jul 2025.
67	Eminent It LLC Top NAICS codes 541511 Custom Computer Programming Services	$921,702	0.1%	Rank history: #71 in FY2021, #71 in FY2022, #71 in FY2023, #83 in FY2024 and #67 in FY2025; new, not ranked in Aug 2024–Jul 2025.
68	Technuf LLC Top NAICS codes 541511 Custom Computer Programming Services	$907,484	0.1%	Rank history: not on the FY2021–FY2024 lists and #69 in FY2025; up 7 since Aug 2024–Jul 2025.
69	Communication Institute International, Inc. Top NAICS codes 611430 Professional and Management Development Training	$896,626	0.1%	Rank history: not on the FY2021 list, #88 in FY2022, #77 in FY2023, #84 in FY2024 and #68 in FY2025; up 8 since Aug 2024–Jul 2025.
70	Kaimetrix L.L.C. Top NAICS codes 541511 Custom Computer Programming Services	$872,857	0.1%	Rank history: not on the FY2021–FY2023 lists, #48 in FY2024 and #39 in FY2025; down 26 since Aug 2024–Jul 2025.
71	Immersion Consulting LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$774,709	0.1%	Rank history: #76 in FY2021, #77 in FY2022, #76 in FY2023, #86 in FY2024 and #74 in FY2025; new, not ranked in Aug 2024–Jul 2025.
72	Avani Services, LLC Top NAICS codes 541612 Human Resources Consulting Services 611430 Professional and Management Development Training	$729,842	0.1%	Rank history: not on the FY2021–FY2024 lists and #70 in FY2025; up 4 since Aug 2024–Jul 2025.
73	Ergoguys, LLC Top NAICS codes 337214 Office Furniture (except Wood) Manufacturing	$695,013	0.1%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023, #73 in FY2024 and #71 in FY2025; up 7 since Aug 2024–Jul 2025.
74	Assyst Inc. Top NAICS codes 541519 Other Computer Related Services	$681,054	0.1%	Rank history: #90 in FY2021, #81 in FY2022, #79 in FY2023, #87 in FY2024 and #79 in FY2025; up 11 since Aug 2024–Jul 2025.
75	Punch Cyber Corp Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$678,228	0.1%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; new, not ranked in Aug 2024–Jul 2025.
76	Goldbelt Hawk L.L.C. Through Nisga'a Tek, LLC Top NAICS codes 541511 Custom Computer Programming Services	$669,688	0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
77	Intellectechs Inc. Top NAICS codes 541511 Custom Computer Programming Services	$624,737	0.1%	Rank history: not on the FY2021 list, #86 in FY2022, #83 in FY2023, #93 in FY2024 and #81 in FY2025; new, not ranked in Aug 2024–Jul 2025.
78	Silkweb Consulting and Development LLC Top NAICS codes 611710 Educational Support Services	$588,436	0.1%	Rank history: not on the FY2021–FY2024 lists and #100 in FY2025; new, not ranked in Aug 2024–Jul 2025.
79	BAM Technologies LLC Top NAICS codes 541519 Other Computer Related Services	$587,905	0.1%	Rank history: not on the FY2021–FY2024 lists and #61 in FY2025; down 10 since Aug 2024–Jul 2025.
80	Dark Wolf Solutions, LLC Top NAICS codes 541511 Custom Computer Programming Services	$577,756	0.1%	Rank history: not on the FY2021–FY2024 lists and #83 in FY2025; new, not ranked in Aug 2024–Jul 2025.
81	Clason Point Partners Inc. Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$463,750	0.1%	Rank history: #32 in FY2021, #33 in FY2022, #30 in FY2023, #33 in FY2024 and #38 in FY2025; down 42 since Aug 2024–Jul 2025.
82	Four LLC Top NAICS codes 541519 Other Computer Related Services	$409,517	<0.1%	Rank history: not on the FY2021–FY2022 lists, #72 in FY2023, not on the FY2024 list and #90 in FY2025; up 11 since Aug 2024–Jul 2025.
83	Microsoft Corporation Top NAICS codes 541512 Computer Systems Design Services	$405,342	<0.1%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Aug 2024–Jul 2025.
84	Aptima Inc. Top NAICS codes 541511 Custom Computer Programming Services	$399,964	<0.1%	Rank history: not on the FY2021–FY2023 lists, #76 in FY2024 and #94 in FY2025; down 5 since Aug 2024–Jul 2025.
85	Charles River Analytics, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$381,990	<0.1%	Rank history: not on the FY2021 list, #72 in FY2022, not on the FY2023 list, #89 in FY2024 and #95 in FY2025; down 3 since Aug 2024–Jul 2025.
86	Ubiq Software Inc. Top NAICS codes 811210 Electronic and Precision Equipment Repair and Maintenance	$313,387	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 15 since Aug 2024–Jul 2025.
87	Image Management Systems, Inc. Top NAICS codes 517410 Satellite Telecommunications	$304,232	<0.1%	Rank history: not on the FY2021–FY2024 lists and #98 in FY2025; up 13 since Aug 2024–Jul 2025.
88	ABM Federal Sales Inc. Top NAICS codes 334118 Computer Terminal and Other Computer Peripheral Equipment Manufacturing	$303,882	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 27 since Aug 2024–Jul 2025.
89	Ascensus Global, Inc. Top NAICS codes 611430 Professional and Management Development Training	$291,042	<0.1%	Rank history: not on the FY2021 list, #61 in FY2022 and not on the FY2023–FY2025 lists; up 48 since Aug 2024–Jul 2025.
90	Ernst & Young LLP Top NAICS codes 541211 Offices of Certified Public Accountants	$285,857	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 23 since Aug 2024–Jul 2025.
91	GTT Americas, LLC Through GTT Global Telecom Government Services, LLC Top NAICS codes 517111 Wired Telecommunications Carriers 517311 Wired Telecommunications Carriers	$279,846	<0.1%	Rank history: not on the FY2021–FY2024 lists and #97 in FY2025; new, not ranked in Aug 2024–Jul 2025.
92	American Operations Corporation Through AOC Connect, LLC Top NAICS codes 517110 Wired Telecommunications Carriers	$278,970	<0.1%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; new, not ranked in Aug 2024–Jul 2025.
93	Athena Consulting LLC Top NAICS codes 541612 Human Resources Consulting Services	$276,812	<0.1%	Rank history: not on the FY2021–FY2024 lists and #99 in FY2025; up 6 since Aug 2024–Jul 2025.
94	Magellan Federal Inc. Top NAICS codes 624190 Other Individual and Family Services	$242,299	<0.1%	Rank history: not on the FY2021–FY2023 lists, #49 in FY2024 and #20 in FY2025; down 72 since Aug 2024–Jul 2025.
95	Integration Technologies Group, Inc. Top NAICS codes 334111 Electronic Computer Manufacturing	$229,410	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 13 since Aug 2024–Jul 2025.
96	Boundless Assistive Technology LLC Top NAICS codes 334111 Electronic Computer Manufacturing	$227,838	<0.1%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and not on the FY2024–FY2025 lists; up 8 since Aug 2024–Jul 2025.
97	Clear Cloud Solutions Inc. Top NAICS codes 561621 Security Systems Services (except Locksmiths)	$227,259	<0.1%	Rank history: not on the FY2021–FY2025 lists; up 15 since Aug 2024–Jul 2025.
98	Millennium Health & Fitness, Inc. Top NAICS codes 561990 All Other Support Services	$211,066	<0.1%	Rank history: #81 in FY2021, not on the FY2022–FY2024 lists and #48 in FY2025; down 48 since Aug 2024–Jul 2025.
99	Williams, Adley & Company DC LLP Top NAICS codes 541211 Offices of Certified Public Accountants	$204,298	<0.1%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2023–FY2025 lists; up 7 since Aug 2024–Jul 2025.
100	Team Carney, Inc. Top NAICS codes 611430 Professional and Management Development Training	$193,775	<0.1%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and not on the FY2024–FY2025 lists; up 5 since Aug 2024–Jul 2025.

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100 of 163 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 $915 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Aug 2024–Jul 2025. "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.
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 Defense Human Resources Activity contractors in Aug 2025–Jul 2026?

1. Deloitte ($281M), 2. Booz Allen Hamilton Holding Corporation ($60.7M), 3. The Interpublic Group of Companies Inc ($55.4M), 4. Peraton Inc. ($49M), 5. Leidos Holdings, Inc. ($38.5M), 6. Xtec, Incorporated ($37.1M), 7. Institute of International Education Inc. ($33.4M), 8. Human Resources Research Organization (Humrro) ($32.6M), 9. Fors Marsh Group LLC ($29.8M), 10. Guidehouse Inc. ($25.9M).

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