Top 100 Contractors in NAICS 56111: Office Administrative Services, FY2021

Name: Top 100 Contractors in NAICS 56111: Office Administrative Services, FY2021
Creator: GovTribe

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

The top 10 won 37% of FY2021 NAICS 56111 contract dollars

Contract obligations: $761,226,004 Net of deobligations, by contracts coded NAICS 56111 or a code under it
Contractors: 567 Parent companies with an obligation
Largest contractor: Sciolex Corporation $58.1 million, 6.8% 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	Sciolex Corporation Top agencies DHS (Department of Homeland Security)	$58,087,971	6.8%	Rank history: #2 in FY2022, #4 in FY2023, #7 in FY2024 and #5 in FY2025; up 1 since FY2020.
2	Trax International Corporation Top agencies NASA (National Aeronautics and Space Administration)	$48,378,521	5.7%	Rank history: #3 in FY2022, #3 in FY2023, #3 in FY2024 and not on the FY2025 list; down 1 since FY2020.
3	ITC Federal, LLC Top agencies DHS (Department of Homeland Security)	$39,035,921	4.6%	Rank history: #5 in FY2022, #1 in FY2023, #1 in FY2024 and #3 in FY2025; up 2 since FY2020.
4	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$38,015,203	4.5%	Rank history: #11 in FY2022, #8 in FY2023, #47 in FY2024 and #69 in FY2025; down 1 since FY2020.
5	PAE Government Services Inc. 2 awardees, including FCI Federal, LLC Top agencies DHS (Department of Homeland Security)	$32,112,800	3.8%	Rank history: #4 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
6	Agile Decision Sciences, LLC Top agencies NASA (National Aeronautics and Space Administration)	$31,558,042	3.7%	Rank history: #6 in FY2022, #7 in FY2023, #2 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
7	Koniag, Inc. 2 awardees, including Arlluk Technology Solutions LLC and Koniag Brillient, LLC Top agencies DHS (Department of Homeland Security) DHA (Defense Health Agency) USDA (Department of Agriculture)	$21,897,956	2.6%	Rank history: #14 in FY2022, #6 in FY2023, #10 in FY2024 and not on the FY2025 list; up 92 since FY2020.
8	Brillient Corporation Top agencies DHS (Department of Homeland Security)	$20,961,496	2.5%	Rank history: not on the FY2022–FY2025 lists; down 1 since FY2020.
9	National Industries for the Blind Top agencies DCMA (Defense Contract Management Agency) Army (Department of the Army) Navy (Department of the Navy)	$13,050,549	1.5%	Rank history: #7 in FY2022, #19 in FY2023, #13 in FY2024 and #10 in FY2025; up 129 since FY2020.
10	Apache-Logical JV Top agencies NASA (National Aeronautics and Space Administration)	$12,543,185	1.5%	Rank history: #28 in FY2022, #70 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
11	Case Healthcare Solutions, Inc. Top agencies Army (Department of the Army)	$12,004,401	1.4%	Rank history: #13 in FY2022 and not on the FY2023–FY2025 lists; up 3 since FY2020.
12	CBF Partners JV LLC Top agencies NASA (National Aeronautics and Space Administration)	$11,117,290	1.3%	Rank history: #12 in FY2022, #10 in FY2023, #5 in FY2024 and #15 in FY2025; up 109 since FY2020.
13	Interior Systems, Inc. Top agencies DHS (Department of Homeland Security)	$10,390,595	1.2%	Rank history: #17 in FY2022 and not on the FY2023–FY2025 lists; up 5 since FY2020.
14	Techop Solutions International, Inc. Top agencies DHS (Department of Homeland Security)	$10,066,598	1.2%	Rank history: #16 in FY2022, #12 in FY2023, #11 in FY2024 and #26 in FY2025; up 5 since FY2020.
15	Winnebago Tribe of Nebraska 2 awardees, including HCI Management Services Company and Protege Health Services LLC Top agencies DOS (Department of State) Army (Department of the Army)	$9,866,042	1.2%	Rank history: #26 in FY2022 and not on the FY2023–FY2025 lists; up 9 since FY2020.
16	Katmai North America, LLC Top agencies Army (Department of the Army)	$9,433,788	1.1%	Rank history: #10 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
17	Trace Systems Holdings Inc. Through Trace Systems, Inc. Top agencies Army (Department of the Army)	$9,104,852	1.1%	Rank history: #23 in FY2022, #18 in FY2023, #25 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
18	Nana Regional Corporation Inc 3 awardees, including Akima Global Services, LLC, Cloud Lake Technology LLC and Lockwood Hills Federal LLC Top agencies Commerce (Department of Commerce) DOJ (Department of Justice) DOE (Department of Energy)	$8,327,048	1.0%	Rank history: #15 in FY2022, #32 in FY2023, #46 in FY2024 and not on the FY2025 list; down 1 since FY2020.
19	Americas Staffing Partner Inc. Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) Army (Department of the Army)	$8,321,262	1.0%	Rank history: #36 in FY2022 and not on the FY2023–FY2025 lists; up 106 since FY2020.
20	Chickasaw Management Services, LLC Top agencies DOE (Department of Energy)	$7,263,795	0.9%	Rank history: #18 in FY2022, #27 in FY2023 and not on the FY2024–FY2025 lists; up 23 since FY2020.
21	Siertek, Ltd. Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$7,257,972	0.9%	Rank history: #19 in FY2022 and not on the FY2023–FY2025 lists; up 6 since FY2020.
22	Goldbelt, Incorporated 3 awardees, including Peregrine Technical Solutions, LLC and Goldbelt Glacier Health Services, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior)	$7,189,219	0.8%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; down 12 since FY2020.
23	Katmai Federal Solutions JV, LLC Top agencies USAF (Department of the Air Force)	$6,976,513	0.8%	Rank history: #25 in FY2022, #49 in FY2023 and not on the FY2024–FY2025 lists; up 2 since FY2020.
24	Stratus Federal Solutions LLC Top agencies DHA (Defense Health Agency)	$6,911,447	0.8%	Rank history: #29 in FY2022 and not on the FY2023–FY2025 lists; up 17 since FY2020.
25	Gemini TECH Services LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$6,751,491	0.8%	Rank history: #30 in FY2022, #48 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
26	Kunwon-Ch2M Hill Pmc, LLC Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense)	$6,743,227	0.8%	Rank history: #33 in FY2022, #37 in FY2023, #41 in FY2024 and #34 in FY2025; unchanged since FY2020.
27	Goodwill Industries of San Antonio Contract Services Top agencies USAF (Department of the Air Force)	$6,572,807	0.8%	Rank history: #32 in FY2022, #20 in FY2023, #23 in FY2024 and #29 in FY2025; down 11 since FY2020.
28	Logical Innovations Inc. Top agencies NASA (National Aeronautics and Space Administration)	$6,150,502	0.7%	Rank history: #42 in FY2022, #31 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
29	Sirco IT, LLC Top agencies DOT (Department of Transportation)	$5,912,470	0.7%	Rank history: #60 in FY2022, #96 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2020.
30	Ctrmg-Gapsi JV, LLC Top agencies HHS (Department of Health and Human Services) DOS (Department of State)	$5,872,698	0.7%	Rank history: #8 in FY2022, #53 in FY2023 and not on the FY2024–FY2025 lists; down 19 since FY2020.
31	Tcfii Valor Buyer LLC Through Humana Government Business Inc. Top agencies Army (Department of the Army)	$5,622,717	0.7%	Rank history: #24 in FY2022 and not on the FY2023–FY2025 lists; up 31 since FY2020.
32	Trevor L Newman LLC Top agencies DOT (Department of Transportation)	$5,236,080	0.6%	Rank history: #74 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
33	Tmc-Telesolv Top agencies DHS (Department of Homeland Security)	$5,229,854	0.6%	Rank history: #20 in FY2022, #14 in FY2023, #18 in FY2024 and #32 in FY2025; up 1 since FY2020.
34	Versability Resources, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$5,120,145	0.6%	Rank history: #27 in FY2022, #29 in FY2023, #29 in FY2024 and #43 in FY2025; up 350 since FY2020.
35	Red River Science & Technology, LLC Top agencies USAF (Department of the Air Force)	$4,544,111	0.5%	Rank history: #41 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
36	Arctic Slope Regional Corporation Through Arctic Slope Technical Services, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$4,518,867	0.5%	Rank history: not on the FY2022–FY2023 lists, #30 in FY2024 and #2 in FY2025; down 24 since FY2020.
37	Island Creek Associates, LLC Top agencies Navy (Department of the Navy)	$4,442,473	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
38	Homeland Security Solutions, Inc. Top agencies Navy (Department of the Navy)	$4,429,649	0.5%	Rank history: not on the FY2022–FY2025 lists; down 18 since FY2020.
39	Riva Solutions Inc. Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) USAF (Department of the Air Force)	$4,256,056	0.5%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
40	D2 Government Solutions, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$4,072,384	0.5%	Rank history: #51 in FY2022, #56 in FY2023, #53 in FY2024 and not on the FY2025 list; up 47 since FY2020.
41	Arctic Slope Mission Services LLC Top agencies DOJ (Department of Justice)	$3,941,681	0.5%	Rank history: #87 in FY2022 and not on the FY2023–FY2025 lists; down 35 since FY2020.
42	Depaul Industries Top agencies Army (Department of the Army) Navy (Department of the Navy)	$3,850,200	0.5%	Rank history: #39 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 4 since FY2020.
43	SSC - Deltha, LLC Top agencies DOE (Department of Energy)	$3,497,935	0.4%	Rank history: not on the FY2022–FY2025 lists; down 5 since FY2020.
44	Chenega Enterprise Systems & Solutions, LLC Top agencies HHS (Department of Health and Human Services) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$3,453,575	0.4%	Rank history: #49 in FY2022, #50 in FY2023, #67 in FY2024 and not on the FY2025 list; up 36 since FY2020.
45	Miracorp Inc. Top agencies NASA (National Aeronautics and Space Administration) DHS (Department of Homeland Security)	$3,403,411	0.4%	Rank history: #38 in FY2022 and not on the FY2023–FY2025 lists; down 16 since FY2020.
46	Bowhead Program Management & Operations, LLC Top agencies Navy (Department of the Navy)	$3,303,646	0.4%	Rank history: #53 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; up 9 since FY2020.
47	Teya Enterprises LLC Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$3,265,573	0.4%	Rank history: #89 in FY2022 and not on the FY2023–FY2025 lists; down 5 since FY2020.
48	Advanced Technology Leaders, Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$3,248,529	0.4%	Rank history: #52 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; up 8 since FY2020.
49	Contemporaries, Inc. Top agencies HHS (Department of Health and Human Services)	$3,188,956	0.4%	Rank history: #78 in FY2022, #34 in FY2023, #32 in FY2024 and #46 in FY2025; up 1 since FY2020.
50	Goldbelt Frontier, LLC Top agencies Army (Department of the Army)	$3,187,468	0.4%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
51	Alexton Incorporated Top agencies DOE (Department of Energy) DHS (Department of Homeland Security)	$3,185,346	0.4%	Rank history: #55 in FY2022, #54 in FY2023 and not on the FY2024–FY2025 lists; up 33 since FY2020.
52	Action Staffing Solutions, Inc. Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$3,156,055	0.4%	Rank history: #65 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
53	Ibex It Business Experts LLC Top agencies DOT (Department of Transportation)	$2,983,316	0.3%	Rank history: #45 in FY2022, #47 in FY2023, #43 in FY2024 and #64 in FY2025; up 374 since FY2020.
54	Koniag Management Solutions LLC Top agencies DHS (Department of Homeland Security)	$2,794,012	0.3%	Rank history: #40 in FY2022, #36 in FY2023, #33 in FY2024 and #31 in FY2025; new, not ranked in FY2020.
55	Melwood Horticultural Training Center, Inc. Top agencies NASA (National Aeronautics and Space Administration) DTRA (Defense Threat Reduction Agency) Treasury (Department of the Treasury)	$2,778,583	0.3%	Rank history: #73 in FY2022, #51 in FY2023, #42 in FY2024 and #44 in FY2025; down 15 since FY2020.
56	Global Solutions Group, Inc. Top agencies DOJ (Department of Justice) GSA (General Services Administration) Commerce (Department of Commerce)	$2,770,431	0.3%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
57	GC Associates Usa, LLC Top agencies Navy (Department of the Navy) DHA (Defense Health Agency) Army (Department of the Army)	$2,767,204	0.3%	Rank history: not on the FY2022 list, #95 in FY2023, #93 in FY2024 and #97 in FY2025; down 13 since FY2020.
58	Didlake Inc. Top agencies DOE (Department of Energy) HUD (Department of Housing and Urban Development)	$2,766,180	0.3%	Rank history: #71 in FY2022, #72 in FY2023, #76 in FY2024 and #51 in FY2025; up 2 since FY2020.
59	Advanced Automation Technologies Inc. Top agencies HHS (Department of Health and Human Services) DOJ (Department of Justice)	$2,750,746	0.3%	Rank history: not on the FY2022 list, #79 in FY2023 and not on the FY2024–FY2025 lists; down 24 since FY2020.
60	Rapier Solutions, Inc. Top agencies Army (Department of the Army)	$2,734,389	0.3%	Rank history: not on the FY2022–FY2024 lists and #47 in FY2025; up 31 since FY2020.
61	Specpro Management Services, LLC Top agencies USAID (US Agency for International Development)	$2,705,735	0.3%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; down 30 since FY2020.
62	Medical Records Corp. of Maryland Top agencies HHS (Department of Health and Human Services)	$2,680,000	0.3%	Rank history: #48 in FY2022, #58 in FY2023, not on the FY2024 list and #42 in FY2025; down 9 since FY2020.
63	Intellect Solutions, LLC Top agencies USAF (Department of the Air Force)	$2,654,677	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
64	Rust Consulting Inc. Through Novitex Government Solutions, LLC Top agencies DOJ (Department of Justice)	$2,652,571	0.3%	Rank history: not on the FY2022–FY2025 lists; up 69 since FY2020.
65	English-El Enterprises LLC Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$2,649,050	0.3%	Rank history: #58 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
66	Choctaw Nation of Oklahoma Through Choctaw Staffing Solutions, Inc. Top agencies DHA (Defense Health Agency)	$2,619,086	0.3%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
67	Wits Solutions Inc. Top agencies USDA (Department of Agriculture)	$2,549,860	0.3%	Rank history: not on the FY2022 list, #35 in FY2023 and not on the FY2024–FY2025 lists; up 5 since FY2020.
68	Afognak Native Corporation 6 awardees, including Alutiiq Solutions, LLC, Alutiiq Commercial Enterprises LLC and Alutiiq Career Ventures LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) DHA (Defense Health Agency)	$2,547,776	0.3%	Rank history: #67 in FY2022 and not on the FY2023–FY2025 lists; down 7 since FY2020.
69	Graham & Associates Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$2,485,302	0.3%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
70	Celerapro, LLC Top agencies GSA (General Services Administration)	$2,415,328	0.3%	Rank history: #69 in FY2022, #66 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
71	Els, Inc. Top agencies Navy (Department of the Navy)	$2,377,691	0.3%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; up 4 since FY2020.
72	The Bizzell Group LLC Top agencies DOT (Department of Transportation)	$2,335,227	0.3%	Rank history: #64 in FY2022, #68 in FY2023, #73 in FY2024 and #98 in FY2025; new, not ranked in FY2020.
73	National Academy of Sciences Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service) HHS (Department of Health and Human Services)	$2,325,443	0.3%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
74	Mhsystems Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$2,304,473	0.3%	Rank history: #77 in FY2022, #82 in FY2023, not on the FY2024 list and #99 in FY2025; up 22 since FY2020.
75	Lbyd Federal, LLC Top agencies OSD (Office of the Secretary of Defense)	$2,276,401	0.3%	Rank history: #62 in FY2022, not on the FY2023 list, #26 in FY2024 and #19 in FY2025; new, not ranked in FY2020.
76	Telesolv Consulting Inc. Top agencies GSA (General Services Administration)	$2,175,554	0.3%	Rank history: #75 in FY2022, #92 in FY2023 and not on the FY2024–FY2025 lists; up 17 since FY2020.
77	Xprestest Inc. Top agencies HHS (Department of Health and Human Services)	$2,045,201	0.2%	Rank history: #50 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
78	Highlight Technologies, LLC Top agencies HHS (Department of Health and Human Services)	$2,001,654	0.2%	Rank history: not on the FY2022–FY2025 lists; down 46 since FY2020.
79	Redzone LLC Top agencies DHS (Department of Homeland Security)	$1,969,427	0.2%	Rank history: #76 in FY2022, #75 in FY2023, #54 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
80	Mid-Atlantic Interpreting Group, Inc. Top agencies DOS (Department of State)	$1,944,394	0.2%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
81	Reliable Government Solutions Incorporated Top agencies Navy (Department of the Navy)	$1,912,424	0.2%	Rank history: not on the FY2022–FY2025 lists; down 32 since FY2020.
82	Montech Inc. Top agencies USAF (Department of the Air Force) DOI (Department of the Interior) DOE (Department of Energy)	$1,828,611	0.2%	Rank history: not on the FY2022–FY2025 lists; up 27 since FY2020.
83	Z-Tech Solutions, LLC Top agencies DOT (Department of Transportation)	$1,755,555	0.2%	Rank history: #63 in FY2022, #71 in FY2023, #64 in FY2024 and #50 in FY2025; down 15 since FY2020.
84	Vision Centric Inc. Top agencies DHS (Department of Homeland Security) USDA (Department of Agriculture)	$1,710,481	0.2%	Rank history: not on the FY2022–FY2025 lists; up 5 since FY2020.
85	Nobis Enterprises, Inc. Top agencies HUD (Department of Housing and Urban Development) GSA (General Services Administration) Army (Department of the Army)	$1,709,326	0.2%	Rank history: #82 in FY2022, #78 in FY2023, #79 in FY2024 and #63 in FY2025; up 17 since FY2020.
86	T.a. Consulting, Inc. Top agencies DHA (Defense Health Agency) Navy (Department of the Navy)	$1,690,167	0.2%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
87	Ironarch Technology LLC Top agencies Navy (Department of the Navy)	$1,680,600	0.2%	Rank history: not on the FY2022–FY2025 lists; down 4 since FY2020.
88	The Aegis Corps, Inc. Top agencies OSD (Office of the Secretary of Defense)	$1,675,142	0.2%	Rank history: not on the FY2022–FY2025 lists; down 9 since FY2020.
89	Tenax Technologies LLC Top agencies Army (Department of the Army)	$1,579,890	0.2%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
90	Casepoint, LLC Top agencies VA (Department of Veterans Affairs)	$1,553,290	0.2%	Rank history: #83 in FY2022, #64 in FY2023, #50 in FY2024 and #39 in FY2025; new, not ranked in FY2020.
91	Cook Inlet Region Inc. 3 awardees, including North Wind Site Services LLC Top agencies Navy (Department of the Navy) DOI (Department of the Interior) HHS (Department of Health and Human Services)	$1,551,479	0.2%	Rank history: #81 in FY2022, #63 in FY2023, not on the FY2024 list and #89 in FY2025; up 172 since FY2020.
92	Job Options, Incorporated Top agencies DHS (Department of Homeland Security)	$1,551,045	0.2%	Rank history: #91 in FY2022, #87 in FY2023 and not on the FY2024–FY2025 lists; up 24 since FY2020.
93	Frontline National LLC Top agencies USAF (Department of the Air Force)	$1,547,873	0.2%	Rank history: not on the FY2022 list, #88 in FY2023 and not on the FY2024–FY2025 lists; up 56 since FY2020.
94	Bluepath Labs LLC Top agencies DOE (Department of Energy)	$1,540,227	0.2%	Rank history: #88 in FY2022, not on the FY2023 list, #91 in FY2024 and #80 in FY2025; up 9 since FY2020.
95	Sinew Management Group LLC Top agencies USDA (Department of Agriculture)	$1,534,528	0.2%	Rank history: not on the FY2022–FY2025 lists; up 9 since FY2020.
96	Totally Joined for Achieving Collaborative Techniques (Tjfact), LLC Top agencies HHS (Department of Health and Human Services) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$1,523,385	0.2%	Rank history: not on the FY2022–FY2025 lists; down 14 since FY2020.
97	RWD Consulting LLC Top agencies DHA (Defense Health Agency)	$1,455,009	0.2%	Rank history: #84 in FY2022 and not on the FY2023–FY2025 lists; down 40 since FY2020.
98	Muscogee Staffing Solutions, LLC Top agencies Army (Department of the Army) HUD (Department of Housing and Urban Development)	$1,394,273	0.2%	Rank history: #72 in FY2022, #25 in FY2023, #19 in FY2024 and not on the FY2025 list; up 49 since FY2020.
99	Synergy America, Inc. Top agencies HHS (Department of Health and Human Services)	$1,359,156	0.2%	Rank history: not on the FY2022 list, #99 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
100	CTR Management Group LLC Top agencies DOT (Department of Transportation) DOE (Department of Energy)	$1,353,249	0.2%	Rank history: not on the FY2022 list, #91 in FY2023, #85 in FY2024 and #94 in FY2025; up 92 since FY2020.

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100 of 567 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 56111

Code	Net obligations	Largest contractor
561110 Office Administrative Services	$761,226,004	Sciolex Corporation

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 $853 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 NAICS 56111 contractors in FY2021?

1. Sciolex Corporation ($58.1M), 2. Trax International Corporation ($48.4M), 3. ITC Federal, LLC ($39M), 4. General Dynamics Corporation ($38M), 5. PAE Government Services Inc. ($32.1M), 6. Agile Decision Sciences, LLC ($31.6M), 7. Koniag, Inc. ($21.9M), 8. Brillient Corporation ($21M), 9. National Industries for the Blind ($13.1M), 10. Apache-Logical JV ($12.5M).

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