Top 100 Contractors in PSC C1: Architect-Engineering Services – Construction, FY2025

Name: Top 100 Contractors in PSC C1: Architect-Engineering Services – Construction, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 32% of FY2025 PSC C1 contract dollars

Contract obligations: $1,708,271,532 Net of deobligations, by contracts coded PSC C1 or a code under it
Contractors: 863 Parent companies with an obligation
Largest contractor: Parsons Corporation $142 million, 7.5% of obligations
Data as of: Oct 23, 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	Parsons Corporation 3 awardees, including Ptsi Managed Services Inc. and Parsons Government Services Inc. Top agencies DOT (Department of Transportation) USAF (Department of the Air Force) Smithsonian (Smithsonian Institution)	$141,647,563	7.5%	Rank history: #12 in FY2021, #11 in FY2022, #3 in FY2023 and #4 in FY2024; up 3 since FY2024.
2	Bristol Bay Native Corporation 7 awardees, including CCI Utility and Construction Services, LLC, SES Infrastructure Services LLC and SES Constructors LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security) DOJ (Department of Justice)	$123,782,399	6.6%	Rank history: not on the FY2021–FY2024 lists; new.
3	Jacobs Engineering Group Inc. 12 awardees, including JE Architects / Engineers, P.C., Jacobs Government Services Company and Jacobs / B&V, A Joint Venture (Federal Services) Top agencies Army (Department of the Army) DOT (Department of Transportation) Navy (Department of the Navy)	$91,928,412	4.9%	Rank history: not on the FY2021–FY2023 lists and #6 in FY2024; up 3 since FY2024.
4	RME / PCI Joint Venture LLC Top agencies DOS (Department of State)	$44,526,976	2.4%	Rank history: not on the FY2021–FY2024 lists; new.
5	AECOM 9 awardees, including AECOM Technical Services, Inc., AECOM Services, LLC and Stantec Gs-Aecom Pacific JV Top agencies Navy (Department of the Navy) USAID (US Agency for International Development) DOI (Department of the Interior)	$38,029,814	2.0%	Rank history: #8 in FY2021, #10 in FY2022, #5 in FY2023 and #30 in FY2024; up 25 since FY2024.
6	B.l. Harbert Holdings, L.L.C. Through BL Harbert International LLC Top agencies DOS (Department of State) DOJ (Department of Justice)	$37,983,738	2.0%	Rank history: #3 in FY2021, #1 in FY2022, #1 in FY2023 and #3 in FY2024; down 3 since FY2024.
7	Enterprise Engineering, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$32,580,301	1.7%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2024; up 17 since FY2024.
8	Black & Veatch Special Projects Corp. 2 awardees, including Black & Veatch - GEI JV Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$31,084,834	1.7%	Rank history: #18 in FY2021, #30 in FY2022, #36 in FY2023 and #76 in FY2024; up 68 since FY2024.
9	Deployed Resources LLC Top agencies DHS (Department of Homeland Security)	$30,361,176	1.6%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2024; down 2 since FY2024.
10	RWE Clean Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$27,536,982	1.5%	Rank history: not on the FY2021–FY2024 lists; up 408 since FY2024.
11	Hellmuth, Obata & Kassabaum, Inc. Top agencies GSA (General Services Administration)	$18,226,357	1.0%	Rank history: not on the FY2021–FY2024 lists; up 216 since FY2024.
12	Apogee Consulting Group, P.a. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) Army (Department of the Army)	$17,491,805	0.9%	Rank history: #27 in FY2021, #14 in FY2022, #14 in FY2023 and #70 in FY2024; up 58 since FY2024.
13	Miller-Remick, LLC Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) AOUSC (Administrative Office of the U.S. Courts)	$16,585,097	0.9%	Rank history: #81 in FY2021, #21 in FY2022, #41 in FY2023 and #18 in FY2024; up 5 since FY2024.
14	Himalayan Builders and Engineers Pvt. Ltd Top agencies Navy (Department of the Navy)	$16,056,338	0.9%	Rank history: not on the FY2021–FY2024 lists; new.
15	Hdr, Inc. 14 awardees, including HDR Engineering, Inc., HDR Architecture, Inc. and Hdr-Obg A Joint Venture Top agencies DOT (Department of Transportation) Army (Department of the Army) USAF (Department of the Air Force)	$16,006,453	0.8%	Rank history: #26 in FY2021, #7 in FY2022, #19 in FY2023 and #39 in FY2024; up 24 since FY2024.
16	WSP USA Inc. Top agencies Navy (Department of the Navy)	$15,675,556	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
17	Black & Veatch-Jacobs JV Top agencies Navy (Department of the Navy)	$14,768,982	0.8%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2024; down 5 since FY2024.
18	Spees-Hernandez JV LLC Through Spees LLC Top agencies VA (Department of Veterans Affairs)	$14,541,402	0.8%	Rank history: #59 in FY2021, #20 in FY2022, #9 in FY2023 and #40 in FY2024; up 22 since FY2024.
19	Rore Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$14,449,494	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
20	Smith-Miller + Hawkinson Architects, LLP Top agencies GSA (General Services Administration)	$14,391,209	0.8%	Rank history: not on the FY2021–FY2024 lists; up 319 since FY2024.
21	Ameresco Inc. 2 awardees, including Ameresco Select, Inc. Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs) Army (Department of the Army)	$13,849,503	0.7%	Rank history: #50 in FY2021, #54 in FY2022, #70 in FY2023 and not on the FY2024 list; up 194 since FY2024.
22	Barlovento LLC Top agencies DHS (Department of Homeland Security)	$12,888,115	0.7%	Rank history: not on the FY2021–FY2024 lists; new.
23	Johnson, Mirmiran & Thompson, Inc. 2 awardees, including Clark Nexsen Inc. Top agencies USDA (Department of Agriculture) DOT (Department of Transportation) DHS (Department of Homeland Security)	$12,762,687	0.7%	Rank history: not on the FY2021–FY2024 lists; up 248 since FY2024.
24	Burns & Mcdonnell, Inc. 2 awardees, including Burns & Mcdonnell Engineering Company, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOT (Department of Transportation)	$12,462,089	0.7%	Rank history: #14 in FY2021, #16 in FY2022, #8 in FY2023 and #29 in FY2024; up 5 since FY2024.
25	Jacobs / B&M A Joint Venture Top agencies Navy (Department of the Navy)	$12,454,047	0.7%	Rank history: #25 in FY2021, not on the FY2022 list, #45 in FY2023 and #55 in FY2024; up 30 since FY2024.
26	Dmyles Inc. Top agencies Army (Department of the Army)	$12,019,483	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
27	Inland Dredging Company, L.L.C. Top agencies Army (Department of the Army)	$12,017,268	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
28	Spur Design LLC Top agencies VA (Department of Veterans Affairs)	$11,554,575	0.6%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023 and #32 in FY2024; up 4 since FY2024.
29	Roen Salvage Co. Top agencies Army (Department of the Army)	$11,492,050	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
30	Above Group Inc. Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$11,468,619	0.6%	Rank history: not on the FY2021 list, #77 in FY2022, #38 in FY2023 and #83 in FY2024; up 53 since FY2024.
31	WSP USA Solutions Inc 5 awardees, including WSP USA Inc. and WSP USA Environment & Infrastructure Inc. Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security) Army (Department of the Army)	$10,827,274	0.6%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2023 and #22 in FY2024; down 9 since FY2024.
32	Page Southerland Page, Inc. 3 awardees, including Page Federal Solutions, LLC Top agencies DOS (Department of State) GSA (General Services Administration) VA (Department of Veterans Affairs)	$10,630,146	0.6%	Rank history: not on the FY2021–FY2023 lists and #80 in FY2024; up 48 since FY2024.
33	KMF Architects, LLC Through KZF Design Inc. Top agencies Army (Department of the Army)	$10,610,367	0.6%	Rank history: not on the FY2021–FY2024 lists; up 319 since FY2024.
34	Mndpi Pacific JV Top agencies Navy (Department of the Navy)	$10,210,218	0.5%	Rank history: #2 in FY2021, #5 in FY2022, #6 in FY2023 and #19 in FY2024; down 15 since FY2024.
35	Merrick & Company Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$10,127,477	0.5%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2024; up 16 since FY2024.
36	Valhalla Engineering Group LLC Top agencies VA (Department of Veterans Affairs)	$9,948,284	0.5%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and #33 in FY2024; down 3 since FY2024.
37	Reid Middleton, Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$9,440,072	0.5%	Rank history: not on the FY2021 list, #65 in FY2022, not on the FY2023 list and #26 in FY2024; down 11 since FY2024.
38	Insight Environmental Engineering & Construction, Inc. Top agencies USAF (Department of the Air Force)	$9,360,057	0.5%	Rank history: not on the FY2021–FY2022 lists, #15 in FY2023 and not on the FY2024 list; returned.
39	Emcor Group Inc. Through Emcor Government Services, Inc. Top agencies DOT (Department of Transportation)	$9,299,469	0.5%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and #45 in FY2024; up 6 since FY2024.
40	Stantec Inc. 6 awardees, including Stantec Consulting Services Inc., Stantec / AECOM LLC and Sia-Stantec LLC Top agencies USSOCOM (United States Special Operations Command) DOT (Department of Transportation) USAF (Department of the Air Force)	$9,184,641	0.5%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023 and #73 in FY2024; up 33 since FY2024.
41	Trane U.s. Inc. Top agencies GSA (General Services Administration)	$9,159,762	0.5%	Rank history: not on the FY2021 list, #39 in FY2022, not on the FY2023 list and #53 in FY2024; up 12 since FY2024.
42	Bhate Environmental Associates, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$8,847,209	0.5%	Rank history: not on the FY2021–FY2024 lists; up 104 since FY2024.
43	The Johnson-Mcadams Firm, P.a. Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force)	$8,830,396	0.5%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023 and #34 in FY2024; down 9 since FY2024.
44	CDM Smith Inc. 3 awardees, including CDM Federal Programs Corporation and CDM Constructors Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) IBWC (International Boundary and Water Commission U.S.-Mexico)	$8,539,231	0.5%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2023 and not on the FY2024 list; up 230 since FY2024.
45	Pond-Baker JV Top agencies Navy (Department of the Navy)	$8,511,641	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
46	Specialized Engineering Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$8,227,855	0.4%	Rank history: #56 in FY2021, #36 in FY2022, #21 in FY2023 and #65 in FY2024; up 19 since FY2024.
47	Ewing Cole Inc. Top agencies Smithsonian (Smithsonian Institution)	$8,219,584	0.4%	Rank history: not on the FY2021 list, #58 in FY2022, #63 in FY2023 and #50 in FY2024; up 3 since FY2024.
48	WSP E&Is - HDR Joint Venture Top agencies DLA (Defense Logistics Agency) DHS (Department of Homeland Security)	$7,785,733	0.4%	Rank history: not on the FY2021–FY2024 lists; up 222 since FY2024.
49	DAV Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$7,777,435	0.4%	Rank history: not on the FY2021 list, #53 in FY2022, #53 in FY2023 and #95 in FY2024; up 46 since FY2024.
50	Smithgroup, Inc. Top agencies GSA (General Services Administration) HHS (Department of Health and Human Services)	$7,675,936	0.4%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2024; down 41 since FY2024.
51	Marvel Architects Landscape Architects Urban Designers PLLC Top agencies GSA (General Services Administration)	$7,662,562	0.4%	Rank history: not on the FY2021–FY2024 lists; up 103 since FY2024.
52	Concourse Federal Group LLC Top agencies VA (Department of Veterans Affairs)	$7,538,307	0.4%	Rank history: not on the FY2021 list, #97 in FY2022 and not on the FY2023–FY2024 lists; returned.
53	Merrick-Rs & H Joint Venture LLP Top agencies Army (Department of the Army)	$7,207,030	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
54	Obrien Engineering Inc. Top agencies VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$7,165,078	0.4%	Rank history: not on the FY2021–FY2024 lists; up 306 since FY2024.
55	AECOM + Tetra TECH Joint Venture Top agencies Army (Department of the Army) MDA (DOD Missile Defense Agency)	$7,068,344	0.4%	Rank history: #68 in FY2021 and not on the FY2022–FY2024 lists; returned.
56	Dattner Architects DPC Top agencies GSA (General Services Administration) DOJ (Department of Justice) AOUSC (Administrative Office of the U.S. Courts)	$7,047,283	0.4%	Rank history: #84 in FY2021, not on the FY2022 list, #78 in FY2023 and #23 in FY2024; down 33 since FY2024.
57	Larson Design Group Mason & Hanger Joint Venture Top agencies USAF (Department of the Air Force)	$6,990,948	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
58	Hanson Professional Services, Inc. Top agencies Navy (Department of the Navy)	$6,673,406	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
59	Anderson Engineering of Minnesota, LLC Top agencies VA (Department of Veterans Affairs)	$6,465,443	0.3%	Rank history: #34 in FY2021, #67 in FY2022, #67 in FY2023 and #44 in FY2024; down 15 since FY2024.
60	Cec-Cdm Smith, A Joint Venture Top agencies Army (Department of the Army)	$6,457,777	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
61	Vali Cooper International LLC Top agencies VA (Department of Veterans Affairs)	$6,403,125	0.3%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and #69 in FY2024; up 8 since FY2024.
62	Rogers Lovelock & Fritz Inc. 2 awardees, including RLF & CN JV Top agencies Army (Department of the Army) Navy (Department of the Navy)	$6,276,995	0.3%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; down 2 since FY2024.
63	Kleinfelder - Stantec Usace A Joint Venture Top agencies Army (Department of the Army)	$5,843,688	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
64	L2Eoculus JV LLC Top agencies VA (Department of Veterans Affairs)	$5,545,266	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
65	RDC JPA Architecture, L.L.L.P. Top agencies VA (Department of Veterans Affairs)	$5,469,694	0.3%	Rank history: not on the FY2021 list, #26 in FY2022, #61 in FY2023 and #31 in FY2024; down 34 since FY2024.
66	Harrell Design Group PC Top agencies VA (Department of Veterans Affairs)	$5,280,494	0.3%	Rank history: not on the FY2021–FY2024 lists; up 127 since FY2024.
67	WSM Pacific Siop, A Joint Venture Top agencies Navy (Department of the Navy)	$5,237,374	0.3%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2024; down 50 since FY2024.
68	Lendlease (Us) Construction Inc. Top agencies Smithsonian (Smithsonian Institution)	$5,236,725	0.3%	Rank history: not on the FY2021–FY2024 lists; up 408 since FY2024.
69	Noresco, LLC Top agencies VA (Department of Veterans Affairs)	$5,107,928	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
70	LEO A. Daly LLC 3 awardees Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration)	$5,082,372	0.3%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2023 and not on the FY2024 list; up 173 since FY2024.
71	Health Facility Solutions Company Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$5,014,768	0.3%	Rank history: not on the FY2021–FY2023 lists and #62 in FY2024; down 9 since FY2024.
72	Goshawk, LLC Top agencies DLA (Defense Logistics Agency)	$4,993,408	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
73	Maxim Construction Company, Inc. Top agencies Navy (Department of the Navy)	$4,974,884	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
74	CB Design & Huitt Zollars Joint Venture, LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy)	$4,941,964	0.3%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2024; up 18 since FY2024.
75	Mtfa Architecture, Inc. Top agencies Navy (Department of the Navy) DOS (Department of State) VA (Department of Veterans Affairs)	$4,905,700	0.3%	Rank history: not on the FY2021–FY2024 lists; up 415 since FY2024.
76	Austin Brockenbrough & Associates LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$4,858,756	0.3%	Rank history: not on the FY2021 list, #49 in FY2022, not on the FY2023 list and #85 in FY2024; up 9 since FY2024.
77	The Chenega Corporation 3 awardees, including Chenega Architecture and Design Solutions, LLC and Native Technology Solutions, LLC Top agencies USAF (Department of the Air Force) DOE (Department of Energy) USSOCOM (United States Special Operations Command)	$4,822,969	0.3%	Rank history: not on the FY2021 list, #23 in FY2022, #50 in FY2023 and not on the FY2024 list; returned.
78	Awen Solutions Group, LLC Top agencies VA (Department of Veterans Affairs)	$4,722,815	0.3%	Rank history: not on the FY2021 list, #33 in FY2022, #35 in FY2023 and #25 in FY2024; down 53 since FY2024.
79	Integrity Federal Services, Inc. Top agencies VA (Department of Veterans Affairs)	$4,681,235	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
80	AE Works Ltd 2 awardees Top agencies VA (Department of Veterans Affairs) DOE (Department of Energy) Army (Department of the Army)	$4,623,049	0.2%	Rank history: #100 in FY2021, #62 in FY2022, #17 in FY2023 and #28 in FY2024; down 52 since FY2024.
81	Tls-Ces Services I, LLC Top agencies VA (Department of Veterans Affairs)	$4,486,678	0.2%	Rank history: not on the FY2021 list, #42 in FY2022 and not on the FY2023–FY2024 lists; up 93 since FY2024.
82	Practice for Architecture Urbanism DPC Top agencies DOT (Department of Transportation)	$4,443,152	0.2%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2024; down 33 since FY2024.
83	Gdm-Ae, Inc. Top agencies VA (Department of Veterans Affairs) USDA (Department of Agriculture)	$4,368,497	0.2%	Rank history: #63 in FY2021, #38 in FY2022, #32 in FY2023 and #67 in FY2024; down 16 since FY2024.
84	Fathom Architecture, LLC Top agencies Navy (Department of the Navy)	$4,337,173	0.2%	Rank history: not on the FY2021 list, #82 in FY2022, not on the FY2023 list and #98 in FY2024; up 14 since FY2024.
85	EXP U.S. Services Inc. Through EXP Federal Inc. Top agencies USSOCOM (United States Special Operations Command)	$4,331,704	0.2%	Rank history: not on the FY2021–FY2024 lists; up 167 since FY2024.
86	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)	$4,294,588	0.2%	Rank history: not on the FY2021–FY2024 lists; up 31 since FY2024.
87	GEO. Bancroft Engineering LLC Top agencies VA (Department of Veterans Affairs)	$4,292,631	0.2%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2024; down 19 since FY2024.
88	A and M Engineering & Environmental Services, Inc. Top agencies Army (Department of the Army)	$4,277,129	0.2%	Rank history: not on the FY2021–FY2024 lists; up 153 since FY2024.
89	Guidon Design Inc. Top agencies VA (Department of Veterans Affairs)	$4,226,807	0.2%	Rank history: #43 in FY2021, #76 in FY2022, #81 in FY2023 and not on the FY2024 list; up 53 since FY2024.
90	Prime Veritas General Trading & Contracting Top agencies Army (Department of the Army)	$4,213,693	0.2%	Rank history: not on the FY2021–FY2024 lists; up 269 since FY2024.
91	Potawatomi Defense Operations LLC Top agencies USAF (Department of the Air Force)	$4,147,575	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
92	Aecom Smith Carter Joint Venture Top agencies HHS (Department of Health and Human Services)	$4,102,468	0.2%	Rank history: not on the FY2021–FY2024 lists; up 118 since FY2024.
93	Schmidt-Prime Group, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$4,059,670	0.2%	Rank history: not on the FY2021–FY2024 lists; up 138 since FY2024.
94	GEO / Stanley Joint Venture 2 Top agencies Army (Department of the Army)	$3,881,165	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
95	Northeast Infrastructure LLC Top agencies VA (Department of Veterans Affairs)	$3,880,112	0.2%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023 and #90 in FY2024; down 5 since FY2024.
96	Integrity - the La Group Joint Venture, LLC Top agencies VA (Department of Veterans Affairs)	$3,871,242	0.2%	Rank history: not on the FY2021–FY2024 lists; up 163 since FY2024.
97	CB Design Group, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$3,857,204	0.2%	Rank history: #89 in FY2021, #25 in FY2022, #72 in FY2023 and #79 in FY2024; down 18 since FY2024.
98	YEH and Associates Inc. Top agencies DOT (Department of Transportation)	$3,692,142	0.2%	Rank history: not on the FY2021–FY2024 lists; up 100 since FY2024.
99	The Haskell Company 3 awardees, including Benham - Mead & Hunt, Benham Design, LLC and Benham-Stanley, LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) Army (Department of the Army)	$3,644,153	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
100	Tetra Tech, Inc. 6 awardees, including WJA PLLC, Tetra TECH / Mead and Hunt Joint Venture and Tetra TECH International Inc. Zweigniederlassung Deutschland Top agencies Army (Department of the Army) USAF (Department of the Air Force) USDA (Department of Agriculture)	$3,636,334	0.2%	Rank history: not on the FY2021–FY2024 lists; up 153 since FY2024.

Show 75 more

100 of 863 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC C1

Code	Net obligations	Largest contractor
C1AA Architect and Engineering – Construction: Office Buildings	$244,700,185	RME / PCI Joint Venture LLC
C1DA Architect and Engineering – Construction: Hospitals and Infirmaries	$218,890,099	RWE Clean Energy Solutions, Inc.
C1BZ Architect and Engineering – Construction: Other Airfield Structures	$163,966,980	Parsons Corporation
C1QA Architect and Engineering – Construction: Restoration of Real Property (Public or Private)	$154,998,068	Bristol Bay Native Corporation
C1JZ Architect and Engineering – Construction: Miscellaneous Buildings	$146,450,118	Deployed Resources LLC
C1AZ Architect and Engineering – Construction: Other Administrative Facilities/Service Buildings	$98,576,045	Roen Salvage Co.
C1EB Architect and Engineering – Construction: Maintenance Buildings	$54,711,194	Jacobs Engineering Group Inc.
C1LB Architect and Engineering – Construction: Highways, Roads, Streets, Bridges, and Railways	$53,306,492	WSP USA Solutions Inc
C1PZ Architect and Engineering – Construction: Other Non-Building Facilities	$49,274,328	WSP USA Inc.
C1DB Architect and Engineering – Construction: Laboratories and Clinics	$37,233,896	Ameresco Inc.
C1DZ Architect and Engineering – Construction: Other Hospital Buildings	$36,795,190	Rogers Lovelock & Fritz Inc.
C1JA Architect and Engineering – Construction: Museums and Exhibition Buildings	$30,684,901	Ewing Cole Inc.

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 $1.88 billion 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.
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 PSC C1 contractors in FY2025?

1. Parsons Corporation ($142M), 2. Bristol Bay Native Corporation ($124M), 3. Jacobs Engineering Group Inc. ($91.9M), 4. RME / PCI Joint Venture LLC ($44.5M), 5. AECOM ($38M), 6. B.l. Harbert Holdings, L.L.C. ($38M), 7. Enterprise Engineering, Inc. ($32.6M), 8. Black & Veatch Special Projects Corp. ($31.1M), 9. Deployed Resources LLC ($30.4M), 10. RWE Clean Energy Solutions, Inc. ($27.5M).

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