Top 100 Contractors in NAICS 541310: Architectural Services, FY2025

Name: Top 100 Contractors in NAICS 541310: Architectural Services, FY2025
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 26% of FY2025 NAICS 541310 contract dollars

Contract obligations: $728,001,596 Net of deobligations, by contracts coded NAICS 541310
Contractors: 507 Parent companies with an obligation
Largest contractor: Jacobs Government Services Company $45.1 million, 5.6% 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	Jacobs Government Services Company 5 awardees, including Jacobs Engineering Group Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOJ (Department of Justice)	$45,147,745	5.6%	Rank history: #76 in FY2021, #67 in FY2022, #8 in FY2023 and #2 in FY2024; up 1 since FY2024.
2	AECOM Technical Services, Inc. Top agencies USAID (US Agency for International Development) DOT (Department of Transportation) OSD (Office of the Secretary of Defense)	$35,085,591	4.3%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2024; up 1 since FY2024.
3	BL Harbert International LLC Top agencies DOS (Department of State)	$21,047,333	2.6%	Rank history: not on the FY2021–FY2024 lists; up 321 since FY2024.
4	Hellmuth, Obata & Kassabaum, Inc. Top agencies GSA (General Services Administration) NRC (Nuclear Regulatory Commission)	$20,655,014	2.5%	Rank history: not on the FY2021–FY2023 lists and #56 in FY2024; up 52 since FY2024.
5	Zimmer Gunsul Frasca Architects LLP Top agencies GSA (General Services Administration) DHS (Department of Homeland Security) VA (Department of Veterans Affairs)	$19,048,245	2.3%	Rank history: not on the FY2021–FY2022 lists, #12 in FY2023 and not on the FY2024 list; up 166 since FY2024.
6	Michael Baker International, Inc. Top agencies Army (Department of the Army)	$17,082,949	2.1%	Rank history: not on the FY2021–FY2023 lists and #8 in FY2024; up 2 since FY2024.
7	D+S International LLC Top agencies DOS (Department of State)	$16,378,010	2.0%	Rank history: not on the FY2021–FY2024 lists; up 133 since FY2024.
8	Smith-Miller + Hawkinson Architects, LLP Top agencies GSA (General Services Administration)	$14,391,209	1.8%	Rank history: not on the FY2021 list, #99 in FY2022 and not on the FY2023–FY2024 lists; up 202 since FY2024.
9	CDM International Inc. Top agencies USAID (US Agency for International Development)	$13,388,814	1.6%	Rank history: not on the FY2021–FY2024 lists; new.
10	Tetra Tech, Inc. 5 awardees, including WJA PLLC, Tetra TECH / Mason & Hanger Joint Venture and Tetra TECH / Mead and Hunt Joint Venture Top agencies USAID (US Agency for International Development) USAF (Department of the Air Force) DOJ (Department of Justice)	$12,379,674	1.5%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023 and #21 in FY2024; up 11 since FY2024.
11	RMA Architects Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$12,066,344	1.5%	Rank history: not on the FY2021 list, #32 in FY2022, #22 in FY2023 and #22 in FY2024; up 11 since FY2024.
12	Smithgroup, Inc. 2 awardees Top agencies GSA (General Services Administration) SSA (Social Security Administration) Smithsonian (Smithsonian Institution)	$11,841,984	1.5%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2024; down 5 since FY2024.
13	AECOM 4 awardees, including AECOM Services, LLC and Aecom-Baker Navfac Atlantic A-E Design JV Top agencies DOJ (Department of Justice) Navy (Department of the Navy) DOI (Department of the Interior)	$10,776,169	1.3%	Rank history: #2 in FY2021, #2 in FY2022, #3 in FY2023 and #6 in FY2024; down 7 since FY2024.
14	Golder Europe Service Centre SRL 3 awardees, including WSP USA Solutions Inc., Louis Berger Kyowa JV and WSP USA Inc. Top agencies Army (Department of the Army) Smithsonian (Smithsonian Institution)	$10,436,967	1.3%	Rank history: not on the FY2021–FY2024 lists; up 211 since FY2024.
15	Hdr, Inc. 10 awardees, including HDR Architecture, Inc. and HDR Engineering, Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) USAF (Department of the Air Force)	$9,666,080	1.2%	Rank history: #12 in FY2021, #3 in FY2022, #9 in FY2023 and #23 in FY2024; up 8 since FY2024.
16	The Parsons Corporation 2 awardees, including Michael Baker International, Inc. and Parsons Government Services Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$9,620,415	1.2%	Rank history: not on the FY2021 list, #57 in FY2022, not on the FY2023 list and #54 in FY2024; up 38 since FY2024.
17	Quinn Evans Architects Inc. Top agencies DOI (Department of the Interior) National Gallery of Art Smithsonian (Smithsonian Institution)	$9,484,065	1.2%	Rank history: #32 in FY2021, #95 in FY2022, #80 in FY2023 and #16 in FY2024; down 1 since FY2024.
18	Helber Hastert & Fee Planners Inc. Top agencies Navy (Department of the Navy)	$9,317,084	1.1%	Rank history: #48 in FY2021, #20 in FY2022, #25 in FY2023 and #64 in FY2024; up 46 since FY2024.
19	Ewing Cole Inc. Top agencies Smithsonian (Smithsonian Institution)	$8,243,112	1.0%	Rank history: not on the FY2021 list, #25 in FY2022, #38 in FY2023 and #14 in FY2024; down 5 since FY2024.
20	LEO A Daly + Nbbj JV Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$8,201,695	1.0%	Rank history: not on the FY2021–FY2023 lists and #73 in FY2024; up 53 since FY2024.
21	Studio MA, Inc. Top agencies DOS (Department of State)	$8,124,172	1.0%	Rank history: #90 in FY2021, #7 in FY2022, #67 in FY2023 and #87 in FY2024; up 66 since FY2024.
22	Anderson Hallas Architects, PC Top agencies DOI (Department of the Interior)	$7,818,278	1.0%	Rank history: #31 in FY2021, #29 in FY2022, #77 in FY2023 and #43 in FY2024; up 21 since FY2024.
23	Benham-Stanley, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$7,796,625	1.0%	Rank history: not on the FY2021–FY2024 lists; up 89 since FY2024.
24	Marvel Architects Landscape Architects Urban Designers PLLC Top agencies GSA (General Services Administration)	$7,662,562	0.9%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2024; up 64 since FY2024.
25	Dattner Architects DPC Top agencies GSA (General Services Administration) DOJ (Department of Justice) AOUSC (Administrative Office of the U.S. Courts)	$7,057,283	0.9%	Rank history: #41 in FY2021, not on the FY2022 list, #45 in FY2023 and #5 in FY2024; down 20 since FY2024.
26	KPB Architects Coffman Engineers JV Top agencies Army (Department of the Army)	$6,794,674	0.8%	Rank history: not on the FY2021 list, #30 in FY2022, #58 in FY2023 and not on the FY2024 list; up 126 since FY2024.
27	Obrien Engineering Inc. Top agencies VA (Department of Veterans Affairs)	$6,548,756	0.8%	Rank history: #57 in FY2021, #84 in FY2022 and not on the FY2023–FY2024 lists; up 219 since FY2024.
28	Weiss / Manfredi Architects LLP Top agencies DOS (Department of State)	$6,394,603	0.8%	Rank history: #69 in FY2021 and not on the FY2022–FY2024 lists; returned.
29	Fathom Architecture, LLC Top agencies Navy (Department of the Navy)	$6,318,276	0.8%	Rank history: not on the FY2021 list, #33 in FY2022, #60 in FY2023 and #29 in FY2024; unchanged since FY2024.
30	RDC JPA Architecture, L.L.L.P. Top agencies VA (Department of Veterans Affairs)	$6,095,449	0.8%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023 and #24 in FY2024; down 6 since FY2024.
31	Valhalla Engineering Group LLC Top agencies VA (Department of Veterans Affairs)	$5,898,054	0.7%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2023 and #51 in FY2024; up 20 since FY2024.
32	National Institute of Building Sciences Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) WHS (DOD Washington Headquarters Service)	$5,795,841	0.7%	Rank history: not on the FY2021 list, #44 in FY2022, #48 in FY2023 and #25 in FY2024; down 7 since FY2024.
33	Andrew C Chen Top agencies Navy (Department of the Navy) DOJ (Department of Justice) GSA (General Services Administration)	$5,695,845	0.7%	Rank history: #63 in FY2021, #49 in FY2022, #21 in FY2023 and #34 in FY2024; up 1 since FY2024.
34	L2Eoculus JV LLC Top agencies VA (Department of Veterans Affairs)	$5,545,266	0.7%	Rank history: not on the FY2021–FY2024 lists; new.
35	Spur Design LLC Top agencies VA (Department of Veterans Affairs)	$5,461,805	0.7%	Rank history: #14 in FY2021, #12 in FY2022, #26 in FY2023 and #82 in FY2024; up 47 since FY2024.
36	Baxter Hodell Donnelly Preston Inc. Top agencies VA (Department of Veterans Affairs) DOS (Department of State) GSA (General Services Administration)	$5,424,989	0.7%	Rank history: #54 in FY2021, not on the FY2022 list, #91 in FY2023 and not on the FY2024 list; up 142 since FY2024.
37	Gwwo, Inc. Top agencies DOI (Department of the Interior) Smithsonian (Smithsonian Institution)	$5,247,040	0.6%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and #65 in FY2024; up 28 since FY2024.
38	Mtfa Architecture, Inc. Top agencies Navy (Department of the Navy) DOS (Department of State) GSA (General Services Administration)	$5,131,651	0.6%	Rank history: #61 in FY2021, #51 in FY2022, #84 in FY2023 and #83 in FY2024; up 45 since FY2024.
39	CB Design & Huitt Zollars Joint Venture, LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$4,941,964	0.6%	Rank history: not on the FY2021–FY2024 lists; up 178 since FY2024.
40	Strata Architecture Inc. Top agencies DOI (Department of the Interior) DHS (Department of Homeland Security) GSA (General Services Administration)	$4,884,451	0.6%	Rank history: not on the FY2021 list, #31 in FY2022, #69 in FY2023 and #49 in FY2024; up 9 since FY2024.
41	DHM Design Corporation Top agencies DOI (Department of the Interior)	$4,715,658	0.6%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #45 in FY2024; up 4 since FY2024.
42	Krueck & Sexton Architects, Ltd Top agencies DOS (Department of State) ED (Department of Education) GSA (General Services Administration)	$4,593,861	0.6%	Rank history: #3 in FY2021, #19 in FY2022, #15 in FY2023 and #20 in FY2024; down 22 since FY2024.
43	EXP U.S. Services Inc. Through EXP Federal Inc. Top agencies USSOCOM (United States Special Operations Command) Army (Department of the Army)	$4,592,202	0.6%	Rank history: not on the FY2021–FY2024 lists; up 113 since FY2024.
44	Pond-Woolpert, LLC Top agencies Army (Department of the Army)	$4,559,169	0.6%	Rank history: not on the FY2021 list, #36 in FY2022, not on the FY2023 list and #46 in FY2024; up 2 since FY2024.
45	Practice for Architecture Urbanism DPC Top agencies DOT (Department of Transportation)	$4,443,152	0.5%	Rank history: not on the FY2021–FY2023 lists and #13 in FY2024; down 32 since FY2024.
46	Machado and Silvetti Associates, Inc. Top agencies DOS (Department of State)	$4,371,008	0.5%	Rank history: #87 in FY2021, #45 in FY2022, not on the FY2023 list and #75 in FY2024; up 29 since FY2024.
47	LEO A. Daly LLC Top agencies VA (Department of Veterans Affairs)	$4,343,518	0.5%	Rank history: not on the FY2021–FY2023 lists and #4 in FY2024; down 43 since FY2024.
48	Studios Architecture Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs) United States Tax Court	$4,189,004	0.5%	Rank history: not on the FY2021–FY2023 lists and #98 in FY2024; up 50 since FY2024.
49	N.K. Bhandari Architecture & Engineering P.C. Top agencies GSA (General Services Administration) AOUSC (Administrative Office of the U.S. Courts) DHS (Department of Homeland Security)	$3,998,086	0.5%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; up 17 since FY2024.
50	RLF and Sherlock Smith and Adams JV Top agencies Navy (Department of the Navy) DHA (Defense Health Agency)	$3,936,481	0.5%	Rank history: #5 in FY2021, #5 in FY2022, #59 in FY2023 and #10 in FY2024; down 40 since FY2024.
51	Skidmore, Owings & Merrill LLP Top agencies VA (Department of Veterans Affairs)	$3,936,073	0.5%	Rank history: not on the FY2021–FY2024 lists; up 75 since FY2024.
52	Stantec Inc. 2 awardees, including Stantec Consulting Services Inc. Top agencies USSOCOM (United States Special Operations Command)	$3,850,980	0.5%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #77 in FY2024; up 25 since FY2024.
53	Kierantimberlake LLC Top agencies DOS (Department of State)	$3,843,756	0.5%	Rank history: #70 in FY2021, not on the FY2022 list, #4 in FY2023 and not on the FY2024 list; returned.
54	Mtfa Architecture, P.L.L.C. Top agencies Navy (Department of the Navy) ED (Department of Education) DOS (Department of State)	$3,793,941	0.5%	Rank history: #88 in FY2021, #75 in FY2022, #56 in FY2023 and #35 in FY2024; down 19 since FY2024.
55	Studio Gang Architects Ltd Top agencies DOS (Department of State)	$3,711,934	0.5%	Rank history: not on the FY2021 list, #17 in FY2022 and not on the FY2023–FY2024 lists; up 151 since FY2024.
56	Design Partners, Incorporated Top agencies Navy (Department of the Navy)	$3,630,557	0.4%	Rank history: not on the FY2021 list, #83 in FY2022, #71 in FY2023 and #80 in FY2024; up 24 since FY2024.
57	Harrell Design Group PC Top agencies VA (Department of Veterans Affairs)	$3,611,635	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
58	Stanley Consultants, Inc. Top agencies Navy (Department of the Navy) DOI (Department of the Interior)	$3,605,965	0.4%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; down 8 since FY2024.
59	Fung Associates, Inc. Top agencies Army (Department of the Army)	$3,547,344	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
60	Gensler Architecture, Design & Planning, P.C. Through M Arthur Gensler JR & Associates Inc. Top agencies DOS (Department of State) AOUSC (Administrative Office of the U.S. Courts) Commerce (Department of Commerce)	$3,383,723	0.4%	Rank history: not on the FY2021–FY2023 lists and #78 in FY2024; up 18 since FY2024.
61	Kpb-Rim-Coffman Engineers JV Top agencies Army (Department of the Army)	$3,370,734	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
62	Page Southerland Page, Inc. Top agencies GSA (General Services Administration) Smithsonian (Smithsonian Institution)	$3,260,988	0.4%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2024; down 23 since FY2024.
63	Perkins+Will, Inc. Top agencies GSA (General Services Administration) Smithsonian (Smithsonian Institution) Commerce (Department of Commerce)	$3,121,694	0.4%	Rank history: not on the FY2021–FY2024 lists; up 140 since FY2024.
64	The Urban Collaborative, Llc: Master Planning, Urban Design, and Architecture Top agencies Army (Department of the Army) Commerce (Department of Commerce)	$3,082,415	0.4%	Rank history: not on the FY2021–FY2022 lists, #97 in FY2023 and #37 in FY2024; down 27 since FY2024.
65	Lendlease (Us) Construction Inc. Top agencies Smithsonian (Smithsonian Institution)	$3,066,454	0.4%	Rank history: not on the FY2021–FY2024 lists; up 218 since FY2024.
66	J.C. Chang & Associates Inc. Top agencies DOJ (Department of Justice)	$3,045,848	0.4%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023 and not on the FY2024 list; returned.
67	Michael Baker - Design Alaska Joint Venture Top agencies Army (Department of the Army)	$2,947,880	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
68	Hartman-Cox Architects LLP Top agencies Smithsonian (Smithsonian Institution) National Gallery of Art	$2,933,366	0.4%	Rank history: #82 in FY2021 and not on the FY2022–FY2024 lists; up 128 since FY2024.
69	Jacobs / Ewingcole, A Joint Venture Top agencies Navy (Department of the Navy)	$2,883,925	0.4%	Rank history: #1 in FY2021, #1 in FY2022, #20 in FY2023 and #15 in FY2024; down 54 since FY2024.
70	Above Group Inc. Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$2,853,445	0.4%	Rank history: not on the FY2021–FY2022 lists, #65 in FY2023 and #95 in FY2024; up 25 since FY2024.
71	Morphosis Architects Top agencies DOS (Department of State) GSA (General Services Administration)	$2,675,661	0.3%	Rank history: #64 in FY2021, not on the FY2022 list, #19 in FY2023 and not on the FY2024 list; up 38 since FY2024.
72	Duvall Decker Architects, P.A Top agencies USAF (Department of the Air Force) GSA (General Services Administration) DOI (Department of the Interior)	$2,655,133	0.3%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; up 2 since FY2024.
73	Guernsey / Tingle Architects, P.C. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$2,579,928	0.3%	Rank history: not on the FY2021–FY2024 lists; up 52 since FY2024.
74	Stone Group Architects, Inc. Top agencies VA (Department of Veterans Affairs)	$2,501,834	0.3%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2023 and not on the FY2024 list; up 31 since FY2024.
75	Whitman Requardt & Associates LLP Top agencies Navy (Department of the Navy)	$2,476,854	0.3%	Rank history: #24 in FY2021, #13 in FY2022, #61 in FY2023 and not on the FY2024 list; up 393 since FY2024.
76	Snow Kreilich Architects Inc. Top agencies GSA (General Services Administration)	$2,471,725	0.3%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2023 and not on the FY2024 list; up 63 since FY2024.
77	G.m. Hill Engineering, Inc. Top agencies USAF (Department of the Air Force)	$2,417,577	0.3%	Rank history: not on the FY2021–FY2024 lists; up 31 since FY2024.
78	Schmidt-Prime Group, LLC Top agencies USAF (Department of the Air Force)	$2,401,456	0.3%	Rank history: not on the FY2021–FY2024 lists; up 25 since FY2024.
79	Wcit-Gushiken JV Top agencies USAF (Department of the Air Force)	$2,397,809	0.3%	Rank history: not on the FY2021–FY2024 lists; up 113 since FY2024.
80	Davis Brody Bond-Spacesmith A Joint Venture Top agencies AOUSC (Administrative Office of the U.S. Courts) GSA (General Services Administration)	$2,306,731	0.3%	Rank history: not on the FY2021 list, #74 in FY2022, #14 in FY2023 and not on the FY2024 list; up 122 since FY2024.
81	Shop Architects, Inc. Top agencies DOS (Department of State)	$2,304,604	0.3%	Rank history: #25 in FY2021, #21 in FY2022, #18 in FY2023 and #71 in FY2024; down 10 since FY2024.
82	Michael Maltzan Architecture, Incorporated Top agencies GSA (General Services Administration) DOS (Department of State)	$2,251,993	0.3%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2024; up 2 since FY2024.
83	Thinkform Design Architect LLC Top agencies VA (Department of Veterans Affairs)	$2,229,115	0.3%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and not on the FY2024 list; up 67 since FY2024.
84	KAL Architects, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) AOUSC (Administrative Office of the U.S. Courts)	$2,194,734	0.3%	Rank history: #96 in FY2021, #70 in FY2022, not on the FY2023 list and #42 in FY2024; down 42 since FY2024.
85	Elk Consortium LLC Top agencies VA (Department of Veterans Affairs)	$2,192,497	0.3%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023 and not on the FY2024 list; up 203 since FY2024.
86	Shalom Baranes Associates, P.C. Top agencies USDA (Department of Agriculture) GSA (General Services Administration)	$2,138,956	0.3%	Rank history: not on the FY2021–FY2024 lists; up 78 since FY2024.
87	Perkins Eastman Architects DPC Top agencies GSA (General Services Administration) VA (Department of Veterans Affairs)	$2,095,180	0.3%	Rank history: #66 in FY2021 and not on the FY2022–FY2024 lists; up 29 since FY2024.
88	Houser Walker Architecture, LLC Top agencies DOI (Department of the Interior)	$1,987,985	0.2%	Rank history: not on the FY2021–FY2023 lists and #94 in FY2024; up 6 since FY2024.
89	Gurri Matute Cromwell JV LLC Top agencies USAF (Department of the Air Force)	$1,972,624	0.2%	Rank history: not on the FY2021 list, #69 in FY2022 and not on the FY2023–FY2024 lists; up 254 since FY2024.
90	Wiley & Wilson, Inc. 2 awardees Top agencies DOT (Department of Transportation) DOS (Department of State) DOI (Department of the Interior)	$1,961,154	0.2%	Rank history: not on the FY2021–FY2024 lists; up 48 since FY2024.
91	Zapata / AME JV, LLC Top agencies USAF (Department of the Air Force)	$1,954,493	0.2%	Rank history: not on the FY2021–FY2024 lists; up 26 since FY2024.
92	Richter Associates Architects Inc. Top agencies GSA (General Services Administration) Treasury (Department of the Treasury) DHS (Department of Homeland Security)	$1,914,272	0.2%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and not on the FY2024 list; up 77 since FY2024.
93	Lavastida Development Group, L.l.c Top agencies DOJ (Department of Justice)	$1,868,947	0.2%	Rank history: not on the FY2021–FY2024 lists; up 17 since FY2024.
94	Dewberry Engineers Inc. Top agencies DOJ (Department of Justice)	$1,868,496	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
95	Interior Architects, Inc. Top agencies DOE (Department of Energy)	$1,862,642	0.2%	Rank history: not on the FY2021–FY2024 lists; up 154 since FY2024.
96	SMRT Inc. Top agencies DOJ (Department of Justice)	$1,841,750	0.2%	Rank history: not on the FY2021–FY2024 lists; up 169 since FY2024.
97	Ch2M - Burns & Mcdonnell Joint Venture Top agencies Navy (Department of the Navy)	$1,819,952	0.2%	Rank history: not on the FY2021–FY2023 lists and #70 in FY2024; down 27 since FY2024.
98	Wiss, Janney, Elstner Associates, Inc. Top agencies GSA (General Services Administration) DOS (Department of State)	$1,773,783	0.2%	Rank history: not on the FY2021 list, #28 in FY2022, #73 in FY2023 and #41 in FY2024; down 57 since FY2024.
99	PDC BV Joint Venture Top agencies Army (Department of the Army)	$1,745,385	0.2%	Rank history: not on the FY2021–FY2024 lists; up 154 since FY2024.
100	Koniag Technology Solutions Inc. Top agencies DOJ (Department of Justice)	$1,702,435	0.2%	Rank history: not on the FY2021–FY2024 lists; up 61 since FY2024.

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100 of 507 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 $812 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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 541310 contractors in FY2025?

1. Jacobs Government Services Company ($45.1M), 2. AECOM Technical Services, Inc. ($35.1M), 3. BL Harbert International LLC ($21M), 4. Hellmuth, Obata & Kassabaum, Inc. ($20.7M), 5. Zimmer Gunsul Frasca Architects LLP ($19M), 6. Michael Baker International, Inc. ($17.1M), 7. D+S International LLC ($16.4M), 8. Smith-Miller + Hawkinson Architects, LLP ($14.4M), 9. CDM International Inc. ($13.4M), 10. Tetra Tech, Inc. ($12.4M).

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