Top 100 Contractors in PSC C1: Architect-Engineering Services – Construction, Jul 2025–Jun 2026

Name: Top 100 Contractors in PSC C1: Architect-Engineering Services – Construction, Jul 2025–Jun 2026
Creator: GovTribe

Parent companies by net contract obligations Jul 1, 2025 – Jun 30, 2026 Code page on GovTribe

The top 10 won 32% of PSC C1 contract dollars from July 2025 through June 2026

Contract obligations: $1,852,538,920 Net of deobligations, by contracts coded PSC C1 or a code under it
Contractors: 807 Parent companies with an obligation
Largest contractor: Parsons Corporation $231 million, 11.6% 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	Parsons Corporation 2 awardees, including Ptsi Managed Services Inc. and Parsons Government Services Inc. Top agencies DOT (Department of Transportation) USAF (Department of the Air Force)	$231,357,970	11.6%	Rank history: #12 in FY2021, #11 in FY2022, #3 in FY2023, #4 in FY2024 and #1 in FY2025; new, not ranked in Jul 2024–Jun 2025.
2	CCI Utility and Construction Services, LLC Top agencies Army (Department of the Army)	$72,940,751	3.6%	Rank history: #1 in FY2021, #3 in FY2022, #2 in FY2023, #2 in FY2024 and #2 in FY2025; down 1 since Jul 2024–Jun 2025.
3	Jacobs Government Services Company 8 awardees, including Jacobs Engineering Group Inc. and Jacobs BV A Joint Venture Top agencies DOT (Department of Transportation) Army (Department of the Army) Navy (Department of the Navy)	$63,740,320	3.2%	Rank history: not on the FY2021–FY2023 lists, #6 in FY2024 and #3 in FY2025; up 2 since Jul 2024–Jun 2025.
4	RME / PCI Joint Venture LLC Top agencies DOS (Department of State)	$44,526,976	2.2%	Rank history: not on the FY2021–FY2024 lists and #4 in FY2025; new, not ranked in Jul 2024–Jun 2025.
5	BL Harbert International LLC Top agencies DOS (Department of State) DOJ (Department of Justice)	$43,517,964	2.2%	Rank history: not on the FY2021–FY2023 lists, #57 in FY2024 and #5 in FY2025; up 15 since Jul 2024–Jun 2025.
6	RWE Clean Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$40,872,580	2.0%	Rank history: not on the FY2021–FY2024 lists and #10 in FY2025; up 236 since Jul 2024–Jun 2025.
7	Black & Veatch-Jacobs JV Top agencies Navy (Department of the Navy)	$37,853,285	1.9%	Rank history: not on the FY2021–FY2023 lists, #12 in FY2024 and #17 in FY2025; unchanged since Jul 2024–Jun 2025.
8	AECOM + Tetra TECH Joint Venture Top agencies Army (Department of the Army)	$35,941,159	1.8%	Rank history: #68 in FY2021, not on the FY2022–FY2024 lists and #53 in FY2025; up 318 since Jul 2024–Jun 2025.
9	Rore Inc. Top agencies DOD (Department of Defense) Navy (Department of the Navy) Army (Department of the Army)	$31,488,808	1.6%	Rank history: not on the FY2021–FY2024 lists and #19 in FY2025; new, not ranked in Jul 2024–Jun 2025.
10	AECOM Technical Services, Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army) DOI (Department of the Interior)	$30,683,479	1.5%	Rank history: not on the FY2021–FY2023 lists, #11 in FY2024 and #7 in FY2025; down 2 since Jul 2024–Jun 2025.
11	Hdr, Inc. 13 awardees, including HDR Environmental, Operations and Construction, Inc., HDR Engineering, Inc. and Hdr-Obg A Joint Venture Top agencies Army (Department of the Army) DOT (Department of Transportation) USAF (Department of the Air Force)	$30,174,094	1.5%	Rank history: #26 in FY2021, #7 in FY2022, #19 in FY2023, #39 in FY2024 and #15 in FY2025; up 23 since Jul 2024–Jun 2025.
12	Mndpi Pacific JV Top agencies Navy (Department of the Navy)	$28,368,417	1.4%	Rank history: #2 in FY2021, #5 in FY2022, #6 in FY2023, #19 in FY2024 and #32 in FY2025; up 18 since Jul 2024–Jun 2025.
13	AECOM 4 awardees, including AECOM Services, LLC and Stantec Gs-Aecom Pacific JV Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$27,272,825	1.4%	Rank history: #8 in FY2021, #10 in FY2022, #5 in FY2023, #30 in FY2024 and #71 in FY2025; up 78 since Jul 2024–Jun 2025.
14	Enterprise Engineering, Inc. Top agencies DLA (Defense Logistics Agency) Army (Department of the Army) Navy (Department of the Navy)	$19,763,735	1.0%	Rank history: not on the FY2021–FY2023 lists, #24 in FY2024 and #6 in FY2025; down 5 since Jul 2024–Jun 2025.
15	Spees-Hernandez JV LLC Through Spees LLC Top agencies VA (Department of Veterans Affairs)	$19,322,444	1.0%	Rank history: #59 in FY2021, #20 in FY2022, #9 in FY2023, #40 in FY2024 and #18 in FY2025; up 33 since Jul 2024–Jun 2025.
16	Trane U.s. Inc. Top agencies GSA (General Services Administration)	$18,393,128	0.9%	Rank history: not on the FY2021 list, #39 in FY2022, not on the FY2023 list, #53 in FY2024 and #38 in FY2025; up 26 since Jul 2024–Jun 2025.
17	Ameresco Inc. Top agencies USDA (Department of Agriculture) VA (Department of Veterans Affairs)	$16,643,469	0.8%	Rank history: #50 in FY2021, #54 in FY2022, #70 in FY2023, not on the FY2024 list and #21 in FY2025; up 171 since Jul 2024–Jun 2025.
18	Clark Nexsen Inc. Top agencies USDA (Department of Agriculture) DHS (Department of Homeland Security) Navy (Department of the Navy)	$14,801,605	0.7%	Rank history: #32 in FY2021, not on the FY2022–FY2024 lists and #43 in FY2025; up 226 since Jul 2024–Jun 2025.
19	Above Group Inc. Top agencies VA (Department of Veterans Affairs) Commerce (Department of Commerce)	$14,110,431	0.7%	Rank history: not on the FY2021 list, #77 in FY2022, #38 in FY2023, #83 in FY2024 and #29 in FY2025; up 19 since Jul 2024–Jun 2025.
20	Tepa - Weston JV Top agencies Army (Department of the Army)	$14,060,476	0.7%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
21	Spur Design LLC Top agencies VA (Department of Veterans Affairs)	$13,457,968	0.7%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023, #32 in FY2024 and #27 in FY2025; up 4 since Jul 2024–Jun 2025.
22	The Johnson-Mcadams Firm, P.a. Top agencies USDA (Department of Agriculture) USAF (Department of the Air Force)	$13,098,787	0.7%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023, #34 in FY2024 and #40 in FY2025; up 10 since Jul 2024–Jun 2025.
23	Apogee Consulting Group, P.a. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$13,061,341	0.7%	Rank history: #27 in FY2021, #14 in FY2022, #14 in FY2023, #70 in FY2024 and #12 in FY2025; up 13 since Jul 2024–Jun 2025.
24	Barlovento LLC Top agencies DHS (Department of Homeland Security)	$12,888,115	0.6%	Rank history: not on the FY2021–FY2024 lists and #22 in FY2025; new, not ranked in Jul 2024–Jun 2025.
25	Roen Salvage Co Top agencies Army (Department of the Army)	$11,702,581	0.6%	Rank history: not on the FY2021–FY2024 lists and #28 in FY2025; new, not ranked in Jul 2024–Jun 2025.
26	MVL USA Inc. Top agencies DOD (Department of Defense)	$11,695,748	0.6%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
27	Inland Dredging Company, L.L.C. Top agencies Army (Department of the Army)	$11,078,079	0.6%	Rank history: not on the FY2021–FY2024 lists and #26 in FY2025; up 16 since Jul 2024–Jun 2025.
28	KMF Architects, LLC Through KZF Design Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$11,072,577	0.6%	Rank history: not on the FY2021–FY2024 lists and #31 in FY2025; up 336 since Jul 2024–Jun 2025.
29	Stantec Inc. 6 awardees, including Stantec Consulting Services Inc. Top agencies Smithsonian (Smithsonian Institution) USSOCOM (United States Special Operations Command) DOT (Department of Transportation)	$10,962,562	0.5%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023, #73 in FY2024 and #41 in FY2025; up 21 since Jul 2024–Jun 2025.
30	Golder Europe Service Centre SRL 4 awardees, including WSP USA Inc. and WSP USA Solutions Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army) DHS (Department of Homeland Security)	$10,868,356	0.5%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2023, #22 in FY2024 and #30 in FY2025; down 13 since Jul 2024–Jun 2025.
31	LEO A Daly / Burns & Mcdonnell Far East Joint Venture Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense)	$10,748,746	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
32	Specialized Engineering Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$10,363,291	0.5%	Rank history: #56 in FY2021, #36 in FY2022, #21 in FY2023, #65 in FY2024 and #44 in FY2025; up 63 since Jul 2024–Jun 2025.
33	AE Works Ltd 2 awardees Top agencies VA (Department of Veterans Affairs) DOE (Department of Energy)	$10,349,208	0.5%	Rank history: #100 in FY2021, #62 in FY2022, #17 in FY2023, #28 in FY2024 and #81 in FY2025; up 20 since Jul 2024–Jun 2025.
34	Tetra Tech, Inc. 6 awardees, including WJA PLLC and Tetra TECH / Mead and Hunt Joint Venture Top agencies Army (Department of the Army) USAF (Department of the Air Force) USDA (Department of Agriculture)	$10,213,519	0.5%	Rank history: not on the FY2021–FY2025 lists; up 96 since Jul 2024–Jun 2025.
35	Seaside Engineering & Surveying, LLC Top agencies Army (Department of the Army)	$10,135,244	0.5%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
36	Noresco, LLC Top agencies VA (Department of Veterans Affairs)	$9,942,454	0.5%	Rank history: #15 in FY2021, #9 in FY2022, not on the FY2023–FY2024 lists and #70 in FY2025; up 37 since Jul 2024–Jun 2025.
37	Burns & Mcdonnell Engineering Company, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DOT (Department of Transportation)	$9,402,107	0.5%	Rank history: not on the FY2021–FY2023 lists, #16 in FY2024 and #24 in FY2025; down 19 since Jul 2024–Jun 2025.
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, not on the FY2024 list and #36 in FY2025; new, not ranked in Jul 2024–Jun 2025.
39	Reid Middleton, Inc. Top agencies Navy (Department of the Navy)	$9,356,446	0.5%	Rank history: not on the FY2021 list, #65 in FY2022, not on the FY2023 list, #26 in FY2024 and #35 in FY2025; down 17 since Jul 2024–Jun 2025.
40	Smith-Miller + Hawkinson Architects, LLP Top agencies GSA (General Services Administration)	$9,073,795	0.5%	Rank history: not on the FY2021–FY2024 lists and #20 in FY2025; up 28 since Jul 2024–Jun 2025.
41	Mdpac JV Top agencies Navy (Department of the Navy)	$8,964,228	0.4%	Rank history: not on the FY2021–FY2023 lists, #46 in FY2024 and not on the FY2025 list; up 161 since Jul 2024–Jun 2025.
42	Health Facility Solutions Company Top agencies VA (Department of Veterans Affairs)	$8,959,867	0.4%	Rank history: not on the FY2021–FY2023 lists, #62 in FY2024 and #72 in FY2025; up 14 since Jul 2024–Jun 2025.
43	Jacobs / B&M A Joint Venture Top agencies Navy (Department of the Navy)	$8,586,474	0.4%	Rank history: #25 in FY2021, not on the FY2022 list, #45 in FY2023, #55 in FY2024 and #23 in FY2025; up 11 since Jul 2024–Jun 2025.
44	Miller-Remick, LLC Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) AOUSC (Administrative Office of the U.S. Courts)	$8,424,059	0.4%	Rank history: #81 in FY2021, #21 in FY2022, #41 in FY2023, #18 in FY2024 and #13 in FY2025; down 31 since Jul 2024–Jun 2025.
45	DAV Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$8,408,730	0.4%	Rank history: not on the FY2021 list, #53 in FY2022, #53 in FY2023, #95 in FY2024 and #47 in FY2025; up 25 since Jul 2024–Jun 2025.
46	Emcor Group Inc. Through Emcor Government Services, Inc. Top agencies DOT (Department of Transportation)	$8,383,129	0.4%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023, #45 in FY2024 and #37 in FY2025; up 74 since Jul 2024–Jun 2025.
47	Tls-Ces Services I, LLC Top agencies VA (Department of Veterans Affairs)	$8,046,423	0.4%	Rank history: not on the FY2021 list, #42 in FY2022, not on the FY2023–FY2024 lists and #82 in FY2025; up 101 since Jul 2024–Jun 2025.
48	Dawes Construction, LLC Top agencies VA (Department of Veterans Affairs)	$8,040,800	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
49	L2Eoculus JV LLC Top agencies VA (Department of Veterans Affairs)	$8,040,627	0.4%	Rank history: not on the FY2021–FY2024 lists and #63 in FY2025; new, not ranked in Jul 2024–Jun 2025.
50	Triple C-The A & E Group LLC Top agencies VA (Department of Veterans Affairs)	$7,808,321	0.4%	Rank history: #36 in FY2021, #13 in FY2022, #23 in FY2023, #42 in FY2024 and not on the FY2025 list; up 14 since Jul 2024–Jun 2025.
51	Tehama, LLC Top agencies USAF (Department of the Air Force)	$7,757,112	0.4%	Rank history: not on the FY2021–FY2023 lists, #66 in FY2024 and not on the FY2025 list; new, not ranked in Jul 2024–Jun 2025.
52	Black & Veatch Special Projects Corp. 2 awardees, including Black & Veatch - GEI JV Top agencies Army (Department of the Army)	$7,662,064	0.4%	Rank history: #18 in FY2021, #30 in FY2022, #36 in FY2023, #76 in FY2024 and #8 in FY2025; down 40 since Jul 2024–Jun 2025.
53	WSP E&Is - HDR Joint Venture Top agencies DHS (Department of Homeland Security)	$7,556,105	0.4%	Rank history: not on the FY2021–FY2024 lists and #46 in FY2025; up 19 since Jul 2024–Jun 2025.
54	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, not on the FY2023–FY2024 lists and #50 in FY2025; new, not ranked in Jul 2024–Jun 2025.
55	Northeast Infrastructure LLC Top agencies VA (Department of Veterans Affairs)	$7,446,250	0.4%	Rank history: not on the FY2021–FY2022 lists, #75 in FY2023, #90 in FY2024 and #97 in FY2025; up 162 since Jul 2024–Jun 2025.
56	Toland Mizell Molnar LLC Top agencies VA (Department of Veterans Affairs)	$7,392,360	0.4%	Rank history: #53 in FY2021, #37 in FY2022, #47 in FY2023, #43 in FY2024 and not on the FY2025 list; up 5 since Jul 2024–Jun 2025.
57	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 and #51 in FY2025; new, not ranked in Jul 2024–Jun 2025.
58	Valhalla Engineering Group LLC Top agencies VA (Department of Veterans Affairs)	$7,093,259	0.4%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023, #33 in FY2024 and #34 in FY2025; down 39 since Jul 2024–Jun 2025.
59	Mark Turner Construction LLC Top agencies Navy (Department of the Navy)	$7,060,937	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
60	Siris LLC Top agencies Smithsonian (Smithsonian Institution) VA (Department of Veterans Affairs)	$7,034,551	0.4%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
61	Larson Design Group Mason & Hanger Joint Venture Top agencies USAF (Department of the Air Force)	$6,990,948	0.3%	Rank history: not on the FY2021–FY2024 lists and #55 in FY2025; new, not ranked in Jul 2024–Jun 2025.
62	Brasfield & Gorrie LLC Top agencies DOJ (Department of Justice)	$6,976,072	0.3%	Rank history: not on the FY2021–FY2023 lists, #1 in FY2024 and not on the FY2025 list; up 279 since Jul 2024–Jun 2025.
63	Design Alaska, Inc. Top agencies Army (Department of the Army)	$6,940,788	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
64	Hanson Professional Services, Inc. Top agencies Navy (Department of the Navy)	$6,673,406	0.3%	Rank history: not on the FY2021–FY2024 lists and #56 in FY2025; new, not ranked in Jul 2024–Jun 2025.
65	Anderson Engineering of Minnesota, LLC Top agencies VA (Department of Veterans Affairs)	$6,642,643	0.3%	Rank history: #34 in FY2021, #67 in FY2022, #67 in FY2023, #44 in FY2024 and #57 in FY2025; down 34 since Jul 2024–Jun 2025.
66	Awen Solutions Group, LLC Top agencies VA (Department of Veterans Affairs)	$6,553,574	0.3%	Rank history: not on the FY2021 list, #33 in FY2022, #35 in FY2023, #25 in FY2024 and #79 in FY2025; down 43 since Jul 2024–Jun 2025.
67	American International Contractors Inc. Top agencies USAF (Department of the Air Force)	$6,526,316	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
68	Obrien Engineering Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$6,369,861	0.3%	Rank history: not on the FY2021–FY2024 lists and #52 in FY2025; up 127 since Jul 2024–Jun 2025.
69	Gdm-Ae, Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$6,145,807	0.3%	Rank history: #63 in FY2021, #38 in FY2022, #32 in FY2023, #67 in FY2024 and #84 in FY2025; up 89 since Jul 2024–Jun 2025.
70	Burns & Mcdonnell, Inc. Top agencies Army (Department of the Army)	$5,996,449	0.3%	Rank history: #14 in FY2021, #16 in FY2022, #8 in FY2023, #29 in FY2024 and not on the FY2025 list; up 402 since Jul 2024–Jun 2025.
71	Page Southerland Page, Inc. Top agencies GSA (General Services Administration) Smithsonian (Smithsonian Institution)	$5,955,426	0.3%	Rank history: not on the FY2021–FY2023 lists, #80 in FY2024 and not on the FY2025 list; up 72 since Jul 2024–Jun 2025.
72	Johnson, Mirmiran & Thompson, Inc. Top agencies DOT (Department of Transportation)	$5,643,346	0.3%	Rank history: not on the FY2021–FY2024 lists and #85 in FY2025; up 55 since Jul 2024–Jun 2025.
73	Vali Cooper International LLC Top agencies VA (Department of Veterans Affairs)	$5,619,516	0.3%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023, #69 in FY2024 and #59 in FY2025; down 32 since Jul 2024–Jun 2025.
74	Stanley-Wsp Joint Venture Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army)	$5,576,171	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
75	Prime Veritas General Trading & Contracting Top agencies Army (Department of the Army)	$5,538,236	0.3%	Rank history: not on the FY2021–FY2024 lists and #92 in FY2025; new, not ranked in Jul 2024–Jun 2025.
76	Galveston Coastal Services A Joint Venture Top agencies Army (Department of the Army)	$5,503,051	0.3%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
77	CDM Federal Programs Corporation Top agencies Army (Department of the Army)	$5,408,080	0.3%	Rank history: not on the FY2021–FY2024 lists and #65 in FY2025; new, not ranked in Jul 2024–Jun 2025.
78	WSP USA Inc. Top agencies Navy (Department of the Navy)	$5,282,573	0.3%	Rank history: not on the FY2021–FY2024 lists and #16 in FY2025; down 52 since Jul 2024–Jun 2025.
79	Austin Brockenbrough & Associates LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$5,224,052	0.3%	Rank history: not on the FY2021 list, #49 in FY2022, not on the FY2023 list, #85 in FY2024 and #77 in FY2025; up 38 since Jul 2024–Jun 2025.
80	Moffatt & Nichol - Burns & Mcdonnell Hawaii Top agencies Navy (Department of the Navy)	$5,223,289	0.3%	Rank history: not on the FY2021–FY2023 lists, #96 in FY2024 and not on the FY2025 list; up 5 since Jul 2024–Jun 2025.
81	Smithgroup, Inc. Top agencies GSA (General Services Administration) HHS (Department of Health and Human Services)	$5,093,023	0.3%	Rank history: not on the FY2021–FY2023 lists, #9 in FY2024 and #48 in FY2025; up 33 since Jul 2024–Jun 2025.
82	N.K. Bhandari Architecture & Engineering P.C. Top agencies GSA (General Services Administration) DHS (Department of Homeland Security) AOUSC (Administrative Office of the U.S. Courts)	$5,077,400	0.3%	Rank history: not on the FY2021–FY2024 lists and #88 in FY2025; up 42 since Jul 2024–Jun 2025.
83	Goshawk, LLC Top agencies DLA (Defense Logistics Agency)	$4,993,408	0.2%	Rank history: not on the FY2021–FY2024 lists and #73 in FY2025; new, not ranked in Jul 2024–Jun 2025.
84	GEO. Bancroft Engineering LLC Top agencies VA (Department of Veterans Affairs)	$4,938,249	0.2%	Rank history: not on the FY2021–FY2023 lists, #68 in FY2024 and #89 in FY2025; up 26 since Jul 2024–Jun 2025.
85	Mtfa Architecture, Inc. Top agencies Navy (Department of the Navy)	$4,902,061	0.2%	Rank history: not on the FY2021–FY2024 lists and #76 in FY2025; up 311 since Jul 2024–Jun 2025.
86	A and M Engineering & Environmental Services, Inc. Top agencies Army (Department of the Army)	$4,783,571	0.2%	Rank history: not on the FY2021–FY2024 lists and #90 in FY2025; up 4 since Jul 2024–Jun 2025.
87	Marvel Architects Landscape Architects Urban Designers PLLC Top agencies GSA (General Services Administration)	$4,702,659	0.2%	Rank history: not on the FY2021–FY2024 lists and #49 in FY2025; down 8 since Jul 2024–Jun 2025.
88	Dattner Architects DPC Top agencies GSA (General Services Administration) DOJ (Department of Justice) SSA (Social Security Administration)	$4,609,128	0.2%	Rank history: #84 in FY2021, not on the FY2022 list, #78 in FY2023, #23 in FY2024 and #54 in FY2025; down 74 since Jul 2024–Jun 2025.
89	Dj&A, P.C. Top agencies DOT (Department of Transportation) USDA (Department of Agriculture)	$4,586,136	0.2%	Rank history: #42 in FY2021, #60 in FY2022, not on the FY2023 list, #77 in FY2024 and not on the FY2025 list; down 5 since Jul 2024–Jun 2025.
90	CB Design Group, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$4,577,970	0.2%	Rank history: #89 in FY2021, #25 in FY2022, #72 in FY2023, #79 in FY2024 and #99 in FY2025; up 31 since Jul 2024–Jun 2025.
91	EMC Incorporated Top agencies Army (Department of the Army)	$4,487,068	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
92	Yuil Eng. & Const. Co.,Ltd Top agencies DOS (Department of State)	$4,467,470	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.
93	AECOM International Inc. Top agencies Army (Department of the Army)	$4,337,051	0.2%	Rank history: not on the FY2021–FY2025 lists; up 132 since Jul 2024–Jun 2025.
94	LEO A. Daly LLC Top agencies VA (Department of Veterans Affairs)	$4,242,336	0.2%	Rank history: not on the FY2021–FY2023 lists, #21 in FY2024 and #69 in FY2025; up 3 since Jul 2024–Jun 2025.
95	GEO / Stanley Joint Venture 2 Top agencies Army (Department of the Army)	$4,208,476	0.2%	Rank history: not on the FY2021–FY2024 lists and #96 in FY2025; new, not ranked in Jul 2024–Jun 2025.
96	RDC JPA Architecture, L.L.L.P. Top agencies VA (Department of Veterans Affairs)	$4,177,145	0.2%	Rank history: not on the FY2021 list, #26 in FY2022, #61 in FY2023, #31 in FY2024 and #64 in FY2025; down 52 since Jul 2024–Jun 2025.
97	Harrell Design Group PC Top agencies VA (Department of Veterans Affairs)	$4,171,310	0.2%	Rank history: not on the FY2021–FY2024 lists and #66 in FY2025; up 79 since Jul 2024–Jun 2025.
98	Raymond Pond Full Service Solutions JV LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$4,061,696	0.2%	Rank history: not on the FY2021–FY2025 lists; up 83 since Jul 2024–Jun 2025.
99	Benham - Mead & Hunt Top agencies USAF (Department of the Air Force)	$3,975,743	0.2%	Rank history: not on the FY2021–FY2025 lists; up 378 since Jul 2024–Jun 2025.
100	Briston Construction LLC Top agencies VA (Department of Veterans Affairs)	$3,967,818	0.2%	Rank history: not on the FY2021–FY2025 lists; new, not ranked in Jul 2024–Jun 2025.

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100 of 807 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC C1

Code	Net obligations	Largest contractor
C1DA Architect and Engineering – Construction: Hospitals and Infirmaries	$285,848,083	RWE Clean Energy Solutions, Inc.
C1BZ Architect and Engineering – Construction: Other Airfield Structures	$255,887,280	Parsons Corporation
C1AA Architect and Engineering – Construction: Office Buildings	$227,298,063	RME / PCI Joint Venture LLC
C1AZ Architect and Engineering – Construction: Other Administrative Facilities/Service Buildings	$114,168,211	Rore Inc.
C1JZ Architect and Engineering – Construction: Miscellaneous Buildings	$102,700,816	AECOM
C1QA Architect and Engineering – Construction: Restoration of Real Property (Public or Private)	$101,256,933	CCI Utility and Construction Services, LLC
C1LB Architect and Engineering – Construction: Highways, Roads, Streets, Bridges, and Railways	$56,423,441	Golder Europe Service Centre SRL
C1PZ Architect and Engineering – Construction: Other Non-Building Facilities	$53,137,625	Tepa - Weston JV
C1EB Architect and Engineering – Construction: Maintenance Buildings	$42,175,289	Jacobs Government Services Company
C1JA Architect and Engineering – Construction: Museums and Exhibition Buildings	$33,866,859	Siris LLC
C1DB Architect and Engineering – Construction: Laboratories and Clinics	$29,485,716	Ameresco Inc.
C1DZ Architect and Engineering – Construction: Other Hospital Buildings	$28,048,587	Dawes Construction, 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 $2 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. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Period: the trailing 12 months end with the last month that ended at least 90 days ago, because the Department of Defense reports its contract actions to FPDS about 90 days late. The list is rebuilt each night.
Rank changes compare with Jul 2024–Jun 2025. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC C1 contractors in Jul 2025–Jun 2026?

1. Parsons Corporation ($231M), 2. CCI Utility and Construction Services, LLC ($72.9M), 3. Jacobs Government Services Company ($63.7M), 4. RME / PCI Joint Venture LLC ($44.5M), 5. BL Harbert International LLC ($43.5M), 6. RWE Clean Energy Solutions, Inc. ($40.9M), 7. Black & Veatch-Jacobs JV ($37.9M), 8. AECOM + Tetra TECH Joint Venture ($35.9M), 9. Rore Inc. ($31.5M), 10. AECOM Technical Services, Inc. ($30.7M).

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