Top 100 Contractors in NAICS 56111: Office Administrative Services, FY2023

Name: Top 100 Contractors in NAICS 56111: Office Administrative Services, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 40% of FY2023 NAICS 56111 contract dollars

Contract obligations: $850,904,760 Net of deobligations, by contracts coded NAICS 56111 or a code under it
Contractors: 543 Parent companies with an obligation
Largest contractor: ITC Federal, LLC $92.7 million, 10.2% 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	ITC Federal, LLC Top agencies DHS (Department of Homeland Security)	$92,697,722	10.2%	Rank history: #3 in FY2021, #5 in FY2022, #1 in FY2024 and #3 in FY2025; up 4 since FY2022.
2	Cherokee Nation Federal Consulting, L.L.C. Top agencies Treasury (Department of the Treasury) DOI (Department of the Interior)	$68,241,677	7.5%	Rank history: not on the FY2021 list, #1 in FY2022, #8 in FY2024 and not on the FY2025 list; down 1 since FY2022.
3	Trax International Corporation Top agencies NASA (National Aeronautics and Space Administration)	$41,757,363	4.6%	Rank history: #2 in FY2021, #3 in FY2022, #3 in FY2024 and not on the FY2025 list; unchanged since FY2022.
4	Sciolex Corporation Top agencies DHS (Department of Homeland Security)	$29,510,744	3.3%	Rank history: #1 in FY2021, #2 in FY2022, #7 in FY2024 and #5 in FY2025; down 2 since FY2022.
5	Kent Campa & Kate Inc. Top agencies DOS (Department of State) VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$25,285,400	2.8%	Rank history: not on the FY2021–FY2022 lists, #4 in FY2024 and #6 in FY2025; up 143 since FY2022.
6	Koniag, Inc. 2 awardees, including Koniag Brillient, LLC and Arlluk Technology Solutions LLC Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture)	$23,133,245	2.5%	Rank history: #7 in FY2021, #14 in FY2022, #10 in FY2024 and not on the FY2025 list; up 8 since FY2022.
7	Agile Decision Sciences, LLC Top agencies NASA (National Aeronautics and Space Administration)	$22,839,271	2.5%	Rank history: #6 in FY2021, #6 in FY2022, #2 in FY2024 and not on the FY2025 list; down 1 since FY2022.
8	General Dynamics Corporation Through General Dynamics Information Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) USAF (Department of the Air Force)	$21,458,745	2.4%	Rank history: #4 in FY2021, #11 in FY2022, #47 in FY2024 and #69 in FY2025; up 3 since FY2022.
9	Muscogee Arora JV LLC Top agencies Army (Department of the Army)	$20,054,482	2.2%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2024 and not on the FY2025 list; new.
10	CBF Partners JV LLC Top agencies NASA (National Aeronautics and Space Administration)	$17,643,558	1.9%	Rank history: #12 in FY2021, #12 in FY2022, #5 in FY2024 and #15 in FY2025; up 2 since FY2022.
11	Katmai North America LLC Top agencies Army (Department of the Army)	$16,304,601	1.8%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2024 and #11 in FY2025; new.
12	Techop Solutions International, Inc. Top agencies DHS (Department of Homeland Security)	$14,970,729	1.6%	Rank history: #14 in FY2021, #16 in FY2022, #11 in FY2024 and #26 in FY2025; up 4 since FY2022.
13	Choisys Technology Inc. Top agencies DOS (Department of State)	$14,814,420	1.6%	Rank history: not on the FY2021 list, #22 in FY2022, #16 in FY2024 and #23 in FY2025; up 9 since FY2022.
14	Tmc-Telesolv Top agencies DHS (Department of Homeland Security)	$11,759,595	1.3%	Rank history: #33 in FY2021, #20 in FY2022, #18 in FY2024 and #32 in FY2025; up 6 since FY2022.
15	Federal Staffing Resources LLC Top agencies Army (Department of the Army)	$11,632,558	1.3%	Rank history: not on the FY2021–FY2022 lists, #14 in FY2024 and not on the FY2025 list; up 157 since FY2022.
16	Bowhead Marine Support Services LLC Top agencies DHS (Department of Homeland Security)	$10,920,426	1.2%	Rank history: not on the FY2021 list, #21 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
17	Koniag Data Solutions LLC Top agencies DHA (Defense Health Agency)	$8,758,609	1.0%	Rank history: not on the FY2021 list, #46 in FY2022 and not on the FY2024–FY2025 lists; up 29 since FY2022.
18	Trace Systems Holdings Inc. Through Trace Systems, Inc. Top agencies Army (Department of the Army)	$8,705,080	1.0%	Rank history: #17 in FY2021, #23 in FY2022, #25 in FY2024 and not on the FY2025 list; up 5 since FY2022.
19	National Industries for the Blind Top agencies Navy (Department of the Navy) Army (Department of the Army) DCMA (Defense Contract Management Agency)	$8,500,965	0.9%	Rank history: #9 in FY2021, #7 in FY2022, #13 in FY2024 and #10 in FY2025; down 12 since FY2022.
20	Goodwill Industries of San Antonio Contract Services Top agencies USAF (Department of the Air Force)	$8,351,834	0.9%	Rank history: #27 in FY2021, #32 in FY2022, #23 in FY2024 and #29 in FY2025; up 12 since FY2022.
21	Northrop Grumman Corporation Through Vinnell Arabia, LLC Top agencies Army (Department of the Army)	$8,281,384	0.9%	Rank history: not on the FY2021 list, #44 in FY2022 and not on the FY2024–FY2025 lists; up 23 since FY2022.
22	General Dynamics Information Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$7,404,982	0.8%	Rank history: not on the FY2021 list, #9 in FY2022 and not on the FY2024–FY2025 lists; down 13 since FY2022.
23	Sourceamerica Top agencies USAF (Department of the Air Force)	$7,358,451	0.8%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2024 and #13 in FY2025; new.
24	LMI Consulting, LLC Top agencies USAF (Department of the Air Force)	$7,288,300	0.8%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2024 and #7 in FY2025; new.
25	Muscogee Staffing Solutions, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) HUD (Department of Housing and Urban Development)	$7,112,070	0.8%	Rank history: #98 in FY2021, #72 in FY2022, #19 in FY2024 and not on the FY2025 list; up 47 since FY2022.
26	Fury Solutions LLC 2 awardees Top agencies USAF (Department of the Air Force)	$6,776,399	0.7%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2024 and #14 in FY2025; new.
27	Chickasaw Management Services, LLC Top agencies DOE (Department of Energy)	$6,034,204	0.7%	Rank history: #20 in FY2021, #18 in FY2022 and not on the FY2024–FY2025 lists; down 9 since FY2022.
28	Chenhall'S Staffing Services Inc. Through Chenhall Sedona Solutions Joint Venture LLC Top agencies DOI (Department of the Interior)	$5,796,495	0.6%	Rank history: not on the FY2021 list, #34 in FY2022, #31 in FY2024 and not on the FY2025 list; up 6 since FY2022.
29	Versability Resources, Inc. Top agencies Navy (Department of the Navy)	$5,785,103	0.6%	Rank history: #34 in FY2021, #27 in FY2022, #29 in FY2024 and #43 in FY2025; down 2 since FY2022.
30	Miracorp Inc Top agencies DHS (Department of Homeland Security) NASA (National Aeronautics and Space Administration)	$5,601,939	0.6%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2024 and not on the FY2025 list; new.
31	Logical Innovations Inc. Top agencies NASA (National Aeronautics and Space Administration)	$5,572,473	0.6%	Rank history: #28 in FY2021, #42 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
32	Nana Regional Corporation Inc Through Akima Global Services, LLC Top agencies Commerce (Department of Commerce)	$5,487,660	0.6%	Rank history: #18 in FY2021, #15 in FY2022, #46 in FY2024 and not on the FY2025 list; down 17 since FY2022.
33	Eursdale Companies LLC Top agencies Navy (Department of the Navy) DHA (Defense Health Agency) Army (Department of the Army)	$5,469,717	0.6%	Rank history: not on the FY2021 list, #31 in FY2022, #90 in FY2024 and #67 in FY2025; down 2 since FY2022.
34	Contemporaries, Inc. Top agencies HHS (Department of Health and Human Services)	$5,278,992	0.6%	Rank history: #49 in FY2021, #78 in FY2022, #32 in FY2024 and #46 in FY2025; up 44 since FY2022.
35	Wits Solutions Inc. Top agencies USDA (Department of Agriculture)	$5,133,360	0.6%	Rank history: #67 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
36	Koniag Management Solutions LLC Top agencies DHS (Department of Homeland Security)	$5,037,248	0.6%	Rank history: #54 in FY2021, #40 in FY2022, #33 in FY2024 and #31 in FY2025; up 4 since FY2022.
37	Kunwon-Ch2M Hill Pmc, LLC Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army)	$4,930,543	0.5%	Rank history: #26 in FY2021, #33 in FY2022, #41 in FY2024 and #34 in FY2025; down 4 since FY2022.
38	Bryce Space and Technology, LLC Top agencies HHS (Department of Health and Human Services)	$4,896,280	0.5%	Rank history: not on the FY2021 list, #37 in FY2022, #21 in FY2024 and not on the FY2025 list; down 1 since FY2022.
39	Iberia Advisory LLC Top agencies Navy (Department of the Navy)	$4,894,128	0.5%	Rank history: not on the FY2021 list, #66 in FY2022 and not on the FY2024–FY2025 lists; up 27 since FY2022.
40	Asrc Federal Facilities Logistics LLC Top agencies DOJ (Department of Justice)	$4,847,734	0.5%	Rank history: not on the FY2021 list, #35 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
41	Depaul Industries Top agencies Army (Department of the Army) Navy (Department of the Navy) DOT (Department of Transportation)	$4,654,599	0.5%	Rank history: #42 in FY2021, #39 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
42	Red River Science & Technology, LLC Top agencies USAF (Department of the Air Force)	$4,462,647	0.5%	Rank history: #35 in FY2021, #41 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
43	Five Rivers Analytics, LLC Top agencies Commerce (Department of Commerce)	$4,323,395	0.5%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2024 and #18 in FY2025; new.
44	BG Consulting Services LLC Top agencies USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$4,242,418	0.5%	Rank history: not on the FY2021 list, #93 in FY2022, #69 in FY2024 and #54 in FY2025; up 49 since FY2022.
45	Vision Centric Inc Top agencies DHS (Department of Homeland Security)	$3,849,251	0.4%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2024 and #24 in FY2025; up 292 since FY2022.
46	Advanced Technology Leaders, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$3,829,093	0.4%	Rank history: #48 in FY2021, #52 in FY2022 and not on the FY2024–FY2025 lists; up 6 since FY2022.
47	Ibex It Business Experts LLC Top agencies DOT (Department of Transportation) HHS (Department of Health and Human Services)	$3,766,029	0.4%	Rank history: #53 in FY2021, #45 in FY2022, #43 in FY2024 and #64 in FY2025; down 2 since FY2022.
48	Gemini TECH Services LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$3,641,741	0.4%	Rank history: #25 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; down 18 since FY2022.
49	Katmai Federal Solutions JV, LLC Top agencies USAF (Department of the Air Force)	$3,570,418	0.4%	Rank history: #23 in FY2021, #25 in FY2022 and not on the FY2024–FY2025 lists; down 24 since FY2022.
50	Chenega Enterprise Systems & Solutions, LLC Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security)	$3,543,636	0.4%	Rank history: #44 in FY2021, #49 in FY2022, #67 in FY2024 and not on the FY2025 list; down 1 since FY2022.
51	Melwood Horticultural Training Center, Inc. Top agencies Treasury (Department of the Treasury) NASA (National Aeronautics and Space Administration) DTRA (Defense Threat Reduction Agency)	$3,403,947	0.4%	Rank history: #55 in FY2021, #73 in FY2022, #42 in FY2024 and #44 in FY2025; up 22 since FY2022.
52	The Chenega Corporation 2 awardees, including Chenega Analytic Business Solutions, LLC Top agencies OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$3,378,024	0.4%	Rank history: not on the FY2021 list, #54 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
53	Ctrmg-Gapsi JV, LLC Top agencies DOS (Department of State) HHS (Department of Health and Human Services)	$3,291,142	0.4%	Rank history: #30 in FY2021, #8 in FY2022 and not on the FY2024–FY2025 lists; down 45 since FY2022.
54	Alexton Incorporated Top agencies DOE (Department of Energy) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$3,238,185	0.4%	Rank history: #51 in FY2021, #55 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
55	Cherokee Nation Defense Solutions LLC Top agencies USAF (Department of the Air Force)	$3,236,291	0.4%	Rank history: not on the FY2021 list, #85 in FY2022 and not on the FY2024–FY2025 lists; up 30 since FY2022.
56	D2 Government Solutions, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$3,142,852	0.3%	Rank history: #40 in FY2021, #51 in FY2022, #53 in FY2024 and not on the FY2025 list; down 5 since FY2022.
57	Coho Federal Solutions JV LLC Top agencies Navy (Department of the Navy)	$3,038,478	0.3%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2024 and not on the FY2025 list; new.
58	Medical Records Corp. of Maryland Top agencies HHS (Department of Health and Human Services)	$3,019,440	0.3%	Rank history: #62 in FY2021, #48 in FY2022, not on the FY2024 list and #42 in FY2025; down 10 since FY2022.
59	Action Capital Corporation Top agencies USDA (Department of Agriculture)	$3,011,511	0.3%	Rank history: not on the FY2021 list, #56 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
60	Brandan Enterprises Inc Top agencies HHS (Department of Health and Human Services)	$2,891,079	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 63 since FY2022.
61	Protech Services Alliance Usa, LLC Top agencies DHS (Department of Homeland Security)	$2,860,266	0.3%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2024 and #20 in FY2025; up 131 since FY2022.
62	UIC Government Services LLC 5 awardees, including Bowhead Global Systems and Technology, LLC, Bowhead Enterprise, Science and Technology, LLC and Bowhead Cybersecurity Solutions & Services, LLC Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) Army (Department of the Army)	$2,799,011	0.3%	Rank history: not on the FY2021 list, #86 in FY2022 and not on the FY2024–FY2025 lists; up 24 since FY2022.
63	Cook Inlet Region Inc. 2 awardees, including North Wind Site Services LLC Top agencies DOI (Department of the Interior) Navy (Department of the Navy)	$2,709,093	0.3%	Rank history: #91 in FY2021, #81 in FY2022, not on the FY2024 list and #89 in FY2025; up 18 since FY2022.
64	Casepoint, LLC Top agencies VA (Department of Veterans Affairs)	$2,544,975	0.3%	Rank history: #90 in FY2021, #83 in FY2022, #50 in FY2024 and #39 in FY2025; up 19 since FY2022.
65	Afognak Native Corporation Through Alutiiq Solutions, LLC Top agencies Navy (Department of the Navy)	$2,541,255	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 155 since FY2022.
66	Celerapro, LLC Top agencies GSA (General Services Administration)	$2,520,407	0.3%	Rank history: #70 in FY2021, #69 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
67	T L Newman Incorporated Through Trevor L Newman LLC Top agencies DOT (Department of Transportation)	$2,505,443	0.3%	Rank history: not on the FY2021–FY2022 lists, #51 in FY2024 and #52 in FY2025; new.
68	The Bizzell Group LLC Top agencies DOT (Department of Transportation)	$2,468,800	0.3%	Rank history: #72 in FY2021, #64 in FY2022, #73 in FY2024 and #98 in FY2025; down 4 since FY2022.
69	Bowhead Program Management & Operations, LLC Top agencies Navy (Department of the Navy)	$2,393,737	0.3%	Rank history: #46 in FY2021, #53 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
70	Apache-Logical JV Top agencies NASA (National Aeronautics and Space Administration)	$2,375,700	0.3%	Rank history: #10 in FY2021, #28 in FY2022 and not on the FY2024–FY2025 lists; down 42 since FY2022.
71	Z-Tech Solutions, LLC Top agencies DOT (Department of Transportation)	$2,316,693	0.3%	Rank history: #83 in FY2021, #63 in FY2022, #64 in FY2024 and #50 in FY2025; down 8 since FY2022.
72	Didlake Inc. Top agencies DOE (Department of Energy) HUD (Department of Housing and Urban Development)	$2,236,456	0.2%	Rank history: #58 in FY2021, #71 in FY2022, #76 in FY2024 and #51 in FY2025; down 1 since FY2022.
73	Sol Engineering Services, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$2,167,455	0.2%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2024 and #30 in FY2025; new.
74	Mora Consultants LLC Top agencies Navy (Department of the Navy) Army (Department of the Army)	$2,152,844	0.2%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2024 and #17 in FY2025; new.
75	Redzone LLC Top agencies DHS (Department of Homeland Security)	$2,027,461	0.2%	Rank history: #79 in FY2021, #76 in FY2022, #54 in FY2024 and not on the FY2025 list; up 1 since FY2022.
76	T1 Services, LLC Top agencies USDA (Department of Agriculture)	$2,023,747	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
77	Itms, Inc. Top agencies Navy (Department of the Navy)	$1,985,759	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 24 since FY2022.
78	Nobis Enterprises, Inc. Top agencies HUD (Department of Housing and Urban Development) GSA (General Services Administration) Army (Department of the Army)	$1,978,162	0.2%	Rank history: #85 in FY2021, #82 in FY2022, #79 in FY2024 and #63 in FY2025; up 4 since FY2022.
79	Advanced Automation Technologies Inc. Top agencies HHS (Department of Health and Human Services)	$1,964,237	0.2%	Rank history: #59 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 34 since FY2022.
80	Diverse Staffing Services Inc Top agencies DOJ (Department of Justice)	$1,959,254	0.2%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2024 and not on the FY2025 list; up 251 since FY2022.
81	Rividium Inc. Top agencies DNFSB (Defense Nuclear Facilities Safety Board) OSD (Office of the Secretary of Defense)	$1,942,108	0.2%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2024 and not on the FY2025 list; up 39 since FY2022.
82	Mhsystems Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$1,941,539	0.2%	Rank history: #74 in FY2021, #77 in FY2022, not on the FY2024 list and #99 in FY2025; down 5 since FY2022.
83	Clason Point Partners Inc. Top agencies DOT (Department of Transportation)	$1,896,789	0.2%	Rank history: not on the FY2021 list, #90 in FY2022, #86 in FY2024 and not on the FY2025 list; up 7 since FY2022.
84	Pohaku Pacific LLC Top agencies DHA (Defense Health Agency)	$1,858,992	0.2%	Rank history: not on the FY2021 list, #92 in FY2022, not on the FY2024 list and #78 in FY2025; up 8 since FY2022.
85	Advent Svcs LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$1,809,454	0.2%	Rank history: not on the FY2021 list, #97 in FY2022, #82 in FY2024 and #56 in FY2025; up 12 since FY2022.
86	Homeland Security Solutions Inc. Top agencies Navy (Department of the Navy)	$1,804,133	0.2%	Rank history: not on the FY2021 list, #80 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
87	Job Options, Incorporated Top agencies DHS (Department of Homeland Security)	$1,767,178	0.2%	Rank history: #92 in FY2021, #91 in FY2022 and not on the FY2024–FY2025 lists; up 4 since FY2022.
88	Frontline National LLC Top agencies USAF (Department of the Air Force)	$1,666,233	0.2%	Rank history: #93 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
89	Aims-Usgp JV LLC Top agencies USAF (Department of the Air Force)	$1,652,823	0.2%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2024 and not on the FY2025 list; new.
90	Maven OFS JV Inc. Top agencies DOD (Department of Defense)	$1,591,818	0.2%	Rank history: not on the FY2021–FY2022 lists, #89 in FY2024 and not on the FY2025 list; new.
91	CTR Management Group LLC Top agencies DOT (Department of Transportation)	$1,581,480	0.2%	Rank history: #100 in FY2021, not on the FY2022 list, #85 in FY2024 and #94 in FY2025; up 51 since FY2022.
92	Telesolv Consulting Inc. Top agencies GSA (General Services Administration)	$1,568,254	0.2%	Rank history: #76 in FY2021, #75 in FY2022 and not on the FY2024–FY2025 lists; down 17 since FY2022.
93	Areli Inc. Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$1,533,512	0.2%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2024 and #61 in FY2025; new.
94	Professional Contract Services, Inc. Top agencies HHS (Department of Health and Human Services) Army (Department of the Army)	$1,512,094	0.2%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2024 and #71 in FY2025; up 114 since FY2022.
95	GC Associates Usa, LLC Top agencies DHA (Defense Health Agency) Navy (Department of the Navy) Army (Department of the Army)	$1,495,441	0.2%	Rank history: #57 in FY2021, not on the FY2022 list, #93 in FY2024 and #97 in FY2025; up 40 since FY2022.
96	Sirco IT, LLC Top agencies DOT (Department of Transportation)	$1,458,659	0.2%	Rank history: #29 in FY2021, #60 in FY2022 and not on the FY2024–FY2025 lists; down 36 since FY2022.
97	Fedwriters, Inc. Top agencies DISA (Defense Information Systems Agency) Navy (Department of the Navy)	$1,447,680	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #72 in FY2025; up 94 since FY2022.
98	Zekaja, L.l.c Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$1,441,740	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	Synergy America, Inc. Top agencies HHS (Department of Health and Human Services)	$1,408,398	0.2%	Rank history: #99 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 5 since FY2022.
100	T47 International, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$1,386,583	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 28 since FY2022.

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100 of 543 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 56111

Code	Net obligations	Largest contractor
561110 Office Administrative Services	$850,904,760	ITC Federal, LLC

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 $908 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 NAICS 56111 contractors in FY2023?

1. ITC Federal, LLC ($92.7M), 2. Cherokee Nation Federal Consulting, L.L.C. ($68.2M), 3. Trax International Corporation ($41.8M), 4. Sciolex Corporation ($29.5M), 5. Kent Campa & Kate Inc. ($25.3M), 6. Koniag, Inc. ($23.1M), 7. Agile Decision Sciences, LLC ($22.8M), 8. General Dynamics Corporation ($21.5M), 9. Muscogee Arora JV LLC ($20.1M), 10. CBF Partners JV LLC ($17.6M).

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