Top 100 Contractors in PSC C: Architect/Engineer Services, FY2024

Name: Top 100 Contractors in PSC C: Architect/Engineer Services, FY2024
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2023 – Sep 30, 2024 Code page on GovTribe

The top 10 won 25% of FY2024 PSC C contract dollars

Contract obligations: $8,765,337,504 Net of deobligations, by contracts coded PSC C or a code under it
Contractors: 2,281 Parent companies with an obligation
Largest contractor: Brasfield & Gorrie LLC $512 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	Brasfield & Gorrie LLC Top agencies DOJ (Department of Justice)	$512,000,000	5.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
2	AECOM Technical Services, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAID (US Agency for International Development)	$399,796,276	4.4%	Rank history: not on the FY2021–FY2023 lists and #2 in FY2025; new.
3	General Atomics Aeronautical Systems, Inc. Top agencies Army (Department of the Army)	$274,832,924	3.0%	Rank history: not on the FY2021–FY2023 lists and #7 in FY2025; new.
4	Jacobs Government Services Company 25 awardees, including Jacobs / B&V, A Joint Venture (Federal Services), Jacobs Engineering Group Inc. and Jacobs BV A Joint Venture Top agencies Navy (Department of the Navy) Army (Department of the Army) DOT (Department of Transportation)	$274,370,617	3.0%	Rank history: #23 in FY2021, #15 in FY2022, #9 in FY2023 and #1 in FY2025; up 5 since FY2023.
5	Hdr, Inc. 39 awardees, including HDR Environmental, Operations and Construction, Inc., HDR Engineering, Inc of the Carolinas and HDR Engineering, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$166,395,741	1.8%	Rank history: #2 in FY2021, #3 in FY2022, #4 in FY2023 and #3 in FY2025; down 1 since FY2023.
6	Ch2M Hill, Inc. Top agencies Navy (Department of the Navy) EPA (Environmental Protection Agency) NASA (National Aeronautics and Space Administration)	$140,527,832	1.5%	Rank history: #53 in FY2021, not on the FY2022–FY2023 lists and #11 in FY2025; returned.
7	Triumph Construction Corp Top agencies Army (Department of the Army)	$132,681,088	1.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
8	CCI Utility and Construction Services, LLC Top agencies Army (Department of the Army)	$132,151,846	1.4%	Rank history: #8 in FY2021, #7 in FY2022, #7 in FY2023 and #8 in FY2025; down 1 since FY2023.
9	Burns & Mcdonnell Engineering Company, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$126,693,018	1.4%	Rank history: not on the FY2021–FY2023 lists and #6 in FY2025; new.
10	Parsons Corporation 5 awardees, including Ptsi Managed Services Inc., Parsons Government Services Inc. and Parsons-Versar Joint Venture Top agencies DOT (Department of Transportation) USAF (Department of the Air Force) Army (Department of the Army)	$126,295,439	1.4%	Rank history: #15 in FY2021, #20 in FY2022, #8 in FY2023 and #4 in FY2025; down 2 since FY2023.
11	B.l. Harbert Holdings, L.L.C. Through BL Harbert International LLC Top agencies DOJ (Department of Justice) DOS (Department of State)	$119,648,144	1.3%	Rank history: #11 in FY2021, #1 in FY2022, #1 in FY2023 and not on the FY2025 list; down 10 since FY2023.
12	Tetra Tech, Inc. 26 awardees, including Tetra TECH / Mason & Hanger Joint Venture and Tetra Tech-Black & Veatch JV Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force)	$108,760,510	1.2%	Rank history: #5 in FY2021, #6 in FY2022, #6 in FY2023 and #10 in FY2025; down 6 since FY2023.
13	WSM Pacific Siop, A Joint Venture Top agencies Navy (Department of the Navy)	$102,636,338	1.1%	Rank history: not on the FY2021 list, #23 in FY2022, #18 in FY2023 and #9 in FY2025; up 5 since FY2023.
14	AECOM 33 awardees, including AECOM Services, Inc., AECOM International Inc. and Aecom-Baker Navfac Atlantic A-E Design JV Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$99,330,549	1.1%	Rank history: #3 in FY2021, #2 in FY2022, #2 in FY2023 and #13 in FY2025; down 12 since FY2023.
15	Gilbane Federal Top agencies USAF (Department of the Air Force)	$98,084,224	1.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
16	BL Harbert International LLC Top agencies DOJ (Department of Justice) DOS (Department of State)	$89,444,348	1.0%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2025; new.
17	WSP USA Solutions Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency) DHS (Department of Homeland Security)	$77,972,954	0.9%	Rank history: not on the FY2021 list, #32 in FY2022, #57 in FY2023 and not on the FY2025 list; up 40 since FY2023.
18	Michael Baker International, Inc. 7 awardees Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$74,679,763	0.8%	Rank history: #27 in FY2021, #31 in FY2022, #25 in FY2023 and #33 in FY2025; up 7 since FY2023.
19	Deployed Resources LLC Top agencies DHS (Department of Homeland Security)	$73,371,334	0.8%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2025; new.
20	Arcadis U.s., Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico) Army (Department of the Army) EPA (Environmental Protection Agency)	$71,162,901	0.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
21	Burns & Mcdonnell, Inc. 3 awardees, including Burns & Mcdonnell Engineering Company, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$67,848,160	0.7%	Rank history: #6 in FY2021, #8 in FY2022, #5 in FY2023 and not on the FY2025 list; down 16 since FY2023.
22	Resolution Consultants - An Aecom-Ensafe Joint Venture Top agencies Navy (Department of the Navy)	$64,237,578	0.7%	Rank history: not on the FY2021 list, #92 in FY2022, #16 in FY2023 and #17 in FY2025; down 6 since FY2023.
23	Black & Veatch Special Projects Corp. 2 awardees, including Black & Veatch - GEI JV Top agencies Army (Department of the Army) USAF (Department of the Air Force) USAID (US Agency for International Development)	$64,084,954	0.7%	Rank history: #12 in FY2021, #41 in FY2022, #13 in FY2023 and #12 in FY2025; down 10 since FY2023.
24	Moffatt & Nichol - Burns & Mcdonnell Hawaii Top agencies Navy (Department of the Navy)	$57,288,495	0.6%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 79 since FY2023.
25	Stantec Inc. 17 awardees, including Stantec Consulting Services Inc. and Stantec-Fni JV Top agencies Navy (Department of the Navy) DOI (Department of the Interior) Army (Department of the Army)	$54,806,228	0.6%	Rank history: not on the FY2021–FY2022 lists, #11 in FY2023 and #15 in FY2025; down 14 since FY2023.
26	Golder Europe Service Centre SRL 11 awardees, including WSP USA Inc., WSP USA Solutions Inc. and Louis Berger Kyowa JV Top agencies Navy (Department of the Navy) Army (Department of the Army) EPA (Environmental Protection Agency)	$54,198,137	0.6%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2023 and #20 in FY2025; up 9 since FY2023.
27	Advancing Resilience In Communities Top agencies DHS (Department of Homeland Security)	$52,520,350	0.6%	Rank history: not on the FY2021 list, #12 in FY2022, #12 in FY2023 and #74 in FY2025; down 15 since FY2023.
28	Leidos Holdings, Inc. 7 awardees, including Stantec GS - WSP JV, Leidos, Inc. and Cardno Tec-Leidos, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$52,445,806	0.6%	Rank history: #35 in FY2021, #37 in FY2022, #22 in FY2023 and #27 in FY2025; down 6 since FY2023.
29	Starr II, A Joint Venture Top agencies DHS (Department of Homeland Security)	$50,325,307	0.5%	Rank history: #10 in FY2021, #22 in FY2022, #19 in FY2023 and #56 in FY2025; down 10 since FY2023.
30	Peraton Inc. Top agencies NASA (National Aeronautics and Space Administration)	$50,307,169	0.5%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2025; new.
31	Smithgroup, Inc. Top agencies HHS (Department of Health and Human Services) GSA (General Services Administration)	$50,172,990	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
32	Dewberry Engineers Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army) Commerce (Department of Commerce)	$47,195,786	0.5%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2025; new.
33	Ptsi Managed Services Inc. Top agencies DOT (Department of Transportation)	$46,970,992	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
34	NV5 Geospatial, Inc. Top agencies DOI (Department of the Interior) Commerce (Department of Commerce) Army (Department of the Army)	$46,902,534	0.5%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2025; new.
35	The Compass PTS JV Top agencies DHS (Department of Homeland Security)	$44,969,719	0.5%	Rank history: #7 in FY2021, #26 in FY2022, #10 in FY2023 and #57 in FY2025; down 25 since FY2023.
36	Rogers Lovelock & Fritz Inc. 3 awardees, including RLF & CN JV Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) Army (Department of the Army)	$42,761,889	0.5%	Rank history: not on the FY2021–FY2023 lists and #18 in FY2025; up 78 since FY2023.
37	Woolpert, Inc. 4 awardees Top agencies DOI (Department of the Interior) Army (Department of the Army) USAF (Department of the Air Force)	$41,204,899	0.5%	Rank history: #32 in FY2021, #19 in FY2022, #49 in FY2023 and #21 in FY2025; up 12 since FY2023.
38	Ch2M Hill Clark Nexsen Energy Partners JV Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$38,608,729	0.4%	Rank history: not on the FY2021 list, #88 in FY2022, #75 in FY2023 and #78 in FY2025; up 37 since FY2023.
39	Desbuild Incorporated Top agencies DOS (Department of State)	$36,201,420	0.4%	Rank history: not on the FY2021–FY2022 lists, #39 in FY2023 and #86 in FY2025; unchanged since FY2023.
40	Tecnica Y Proyectos SA Through Tecnica Y Proyectos Typsa for Engineering Services Top agencies Army (Department of the Army)	$36,138,422	0.4%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023 and not on the FY2025 list; up 16 since FY2023.
41	Ghd-Cowi Joint Venture Top agencies Navy (Department of the Navy)	$35,237,999	0.4%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023 and #46 in FY2025; up 3 since FY2023.
42	Black & Veatch-Jacobs JV Top agencies Navy (Department of the Navy)	$34,377,532	0.4%	Rank history: not on the FY2021–FY2023 lists and #55 in FY2025; new.
43	AECOM International Inc. Top agencies Army (Department of the Army)	$32,902,533	0.4%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2025; new.
44	Benham-Stanley, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$32,609,195	0.4%	Rank history: not on the FY2021–FY2023 lists and #39 in FY2025; up 186 since FY2023.
45	Pond-Baker JV Top agencies Navy (Department of the Navy) Army (Department of the Army)	$32,126,969	0.4%	Rank history: not on the FY2021–FY2022 lists, #82 in FY2023 and #42 in FY2025; up 37 since FY2023.
46	Halff-Mead & Hunt JV, LLC Through Halff Associates, Inc. Top agencies Army (Department of the Army)	$30,882,649	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
47	Obera LLC Top agencies USAF (Department of the Air Force)	$30,594,897	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
48	Peter Kiewit Sons', Inc. Through Weeks Marine, Inc. Top agencies Army (Department of the Army)	$30,063,577	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
49	Jacobs Engineering Group Inc. 16 awardees, including Ch2M Hill, Inc. and Jacobs Government Services Co Top agencies DOT (Department of Transportation) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$29,670,218	0.3%	Rank history: #4 in FY2021, #4 in FY2022, #3 in FY2023 and not on the FY2025 list; down 46 since FY2023.
50	Miller-Remick, LLC Top agencies VA (Department of Veterans Affairs) Navy (Department of the Navy) DOJ (Department of Justice)	$29,156,915	0.3%	Rank history: not on the FY2021 list, #73 in FY2022, not on the FY2023 list and #30 in FY2025; up 95 since FY2023.
51	The Johnson-Mcadams Firm, P.a. Top agencies Navy (Department of the Navy) USDA (Department of Agriculture) USAF (Department of the Air Force)	$29,132,122	0.3%	Rank history: not on the FY2021–FY2022 lists, #50 in FY2023 and #75 in FY2025; down 1 since FY2023.
52	Trevet-Noreas JV LLC Top agencies Navy (Department of the Navy)	$27,966,171	0.3%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2025; new.
53	MBF Architects, P.a. Top agencies Navy (Department of the Navy) Army (Department of the Army) DLA (Defense Logistics Agency)	$24,826,109	0.3%	Rank history: not on the FY2021 list, #70 in FY2022, #72 in FY2023 and #85 in FY2025; up 19 since FY2023.
54	Grunley Construction Co., Inc. Top agencies Navy (Department of the Navy) USDA (Department of Agriculture) Smithsonian (Smithsonian Institution)	$24,326,632	0.3%	Rank history: not on the FY2021 list, #5 in FY2022, not on the FY2023 list and not on the FY2025 list; up 69 since FY2023.
55	Wiley Wilson Burns & Mcdonnell Joint Venture Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$23,765,594	0.3%	Rank history: #97 in FY2021, not on the FY2022 list, #84 in FY2023 and not on the FY2025 list; up 29 since FY2023.
56	Mndpi Pacific JV Top agencies Navy (Department of the Navy)	$23,757,220	0.3%	Rank history: #9 in FY2021, #10 in FY2022, #24 in FY2023 and not on the FY2025 list; down 32 since FY2023.
57	Schmidt-Prime Group, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$23,417,406	0.3%	Rank history: not on the FY2021–FY2022 lists, #79 in FY2023 and #44 in FY2025; up 22 since FY2023.
58	Design Partners, Incorporated Top agencies Navy (Department of the Navy) Army (Department of the Army)	$23,182,311	0.3%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and #83 in FY2025; up 34 since FY2023.
59	Summer Consultants Inc Top agencies Navy (Department of the Navy) GSA (General Services Administration) HHS (Department of Health and Human Services)	$22,736,199	0.2%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #53 in FY2025; up 24 since FY2023.
60	Focus Revision Partners LLC Top agencies DHS (Department of Homeland Security)	$22,455,722	0.2%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; new.
61	Ea-Baker JV Top agencies DLA (Defense Logistics Agency)	$22,307,097	0.2%	Rank history: #41 in FY2021, #44 in FY2022, #47 in FY2023 and not on the FY2025 list; down 14 since FY2023.
62	LEO A. Daly LLC Top agencies VA (Department of Veterans Affairs)	$22,285,212	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
63	Anderson Engineering of Minnesota, LLC Top agencies VA (Department of Veterans Affairs) DOI (Department of the Interior)	$22,265,387	0.2%	Rank history: #46 in FY2021, not on the FY2022–FY2023 lists and #50 in FY2025; up 74 since FY2023.
64	Jacobs / B&M A Joint Venture Top agencies Navy (Department of the Navy)	$22,196,123	0.2%	Rank history: #59 in FY2021, not on the FY2022 list, #42 in FY2023 and #26 in FY2025; down 22 since FY2023.
65	Pond & Company Top agencies DLA (Defense Logistics Agency) DOJ (Department of Justice) USAF (Department of the Air Force)	$22,066,013	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 47 since FY2023.
66	Reid Middleton, Inc. 2 awardees Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) DOS (Department of State)	$21,128,418	0.2%	Rank history: not on the FY2021 list, #56 in FY2022, not on the FY2023 list and #67 in FY2025; up 54 since FY2023.
67	Enterprise Engineering, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$20,570,438	0.2%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2025; new.
68	AE Works Ltd 2 awardees Top agencies VA (Department of Veterans Affairs) AFRH (Armed Forces Retirement Home) HHS (Department of Health and Human Services)	$20,566,311	0.2%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2023 and not on the FY2025 list; down 27 since FY2023.
69	Dattner Architects DPC Top agencies GSA (General Services Administration) DOJ (Department of Justice) SSA (Social Security Administration)	$19,749,440	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 191 since FY2023.
70	Utility Works A Joint Venture Top agencies Navy (Department of the Navy)	$19,616,218	0.2%	Rank history: not on the FY2021 list, #24 in FY2022, not on the FY2023 list and #72 in FY2025; up 59 since FY2023.
71	Dj&A, P.C. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture) DOT (Department of Transportation)	$19,558,120	0.2%	Rank history: #47 in FY2021, #45 in FY2022, #74 in FY2023 and not on the FY2025 list; up 3 since FY2023.
72	Framaco International Inc. Top agencies DOS (Department of State)	$19,544,375	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
73	Awen Solutions Group, LLC Top agencies VA (Department of Veterans Affairs)	$19,301,658	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 69 since FY2023.
74	Woolpert-Rs&H LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DODEA (Department of Defense Education Activity)	$19,057,976	0.2%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2023 and not on the FY2025 list; up 21 since FY2023.
75	Geosyntec Jacobs A Joint Venture Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$19,029,537	0.2%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2023 and #35 in FY2025; up 16 since FY2023.
76	Power Engineers Inc. Top agencies Navy (Department of the Navy)	$18,700,228	0.2%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2023 and not on the FY2025 list; down 16 since FY2023.
77	Weston & Sampson Engineers, Inc. Top agencies Navy (Department of the Navy)	$18,006,154	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
78	Stantec Consulting Services Inc. 6 awardees, including Sia-Stantec LLC and Fsb-Stantec JV Top agencies Army (Department of the Army) DOI (Department of the Interior) Navy (Department of the Navy)	$17,930,464	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
79	The Urban Collaborative, Llc: Master Planning, Urban Design, and Architecture Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$17,652,656	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 153 since FY2023.
80	Venesco LLC Top agencies DOS (Department of State)	$17,539,988	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
81	Colby Co LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) DHS (Department of Homeland Security)	$17,271,834	0.2%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2025; new.
82	Jacobs / B&V, A Joint Venture (Federal Services) Top agencies Navy (Department of the Navy)	$16,998,747	0.2%	Rank history: not on the FY2021 list, #33 in FY2022, #26 in FY2023 and not on the FY2025 list; down 56 since FY2023.
83	Mdpac JV Top agencies Navy (Department of the Navy)	$16,766,719	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 379 since FY2023.
84	Fugro USA Land, Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army) Commerce (Department of Commerce)	$16,638,822	0.2%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2025; new.
85	MPR Associates Inc. Top agencies Army (Department of the Army)	$16,269,142	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
86	Camp Dresser & Mckee Inc. 5 awardees, including CDM International Inc., CDM Federal Programs Corporation and CDM Smith Inc. Top agencies USAID (US Agency for International Development) EPA (Environmental Protection Agency) Army (Department of the Army)	$16,160,835	0.2%	Rank history: #17 in FY2021, #21 in FY2022, #30 in FY2023 and not on the FY2025 list; down 56 since FY2023.
87	Merrick & Company 2 awardees, including Merrick-Atkins Joint Venture, LLP Top agencies Army (Department of the Army) USAF (Department of the Air Force) USDA (Department of Agriculture)	$15,849,402	0.2%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2025; new.
88	Barge Emersion Joint Venture Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$15,502,274	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 200 since FY2023.
89	KAL Architects, Inc. Top agencies USAF (Department of the Air Force) VA (Department of Veterans Affairs) Army (Department of the Army)	$15,435,535	0.2%	Rank history: #73 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; up 335 since FY2023.
90	Mcmillen, Inc. Top agencies Army (Department of the Army)	$14,930,355	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
91	HDR Architecture, Inc. Top agencies WHS (DOD Washington Headquarters Service) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$14,890,536	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
92	WSP USA Environment & Infrastructure Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$14,712,283	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
93	Spur Design LLC Top agencies VA (Department of Veterans Affairs)	$14,654,725	0.2%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and #73 in FY2025; up 1 since FY2023.
94	Fourfront Design Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) USAF (Department of the Air Force)	$14,590,560	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 226 since FY2023.
95	Valhalla Engineering Group LLC Top agencies VA (Department of Veterans Affairs)	$14,275,726	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 78 since FY2023.
96	K2 Construction Consultants, Inc. Top agencies DHS (Department of Homeland Security)	$14,059,352	0.2%	Rank history: not on the FY2021–FY2023 lists and #58 in FY2025; up 220 since FY2023.
97	Mantech SRS Technologies, Inc. Top agencies Navy (Department of the Navy)	$13,982,924	0.2%	Rank history: not on the FY2021–FY2023 lists and #59 in FY2025; new.
98	Baker-Aecom Environmental Compliance JV Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$13,851,375	0.2%	Rank history: not on the FY2021 list, #96 in FY2022, #70 in FY2023 and #66 in FY2025; down 28 since FY2023.
99	Spees-Hernandez JV LLC 2 awardees, including Spees LLC and Spees-Reid Middleton JV, LLC Top agencies VA (Department of Veterans Affairs) DFAS (Defense Finance and Accounting Service) USAF (Department of the Air Force)	$13,836,445	0.2%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2023 and #70 in FY2025; down 68 since FY2023.
100	RDC JPA Architecture, L.L.L.P. Top agencies VA (Department of Veterans Affairs)	$13,729,707	0.1%	Rank history: not on the FY2021 list, #90 in FY2022, not on the FY2023 list and not on the FY2025 list; up 98 since FY2023.

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100 of 2,281 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC C

Code	Net obligations	Largest contractor
C2 Architect-Engineering Services – General	$5,930,152,595	AECOM Technical Services, Inc.
C1 Architect-Engineering Services – Construction	$2,835,184,908	Brasfield & Gorrie 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 $9.15 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.
Fiscal year 2024 ran Oct 1, 2023 – Sep 30, 2024. 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 FY2023. "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 FY2023 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 C contractors in FY2024?

1. Brasfield & Gorrie LLC ($512M), 2. AECOM Technical Services, Inc. ($400M), 3. General Atomics Aeronautical Systems, Inc. ($275M), 4. Jacobs Government Services Company ($274M), 5. Hdr, Inc. ($166M), 6. Ch2M Hill, Inc. ($141M), 7. Triumph Construction Corp ($133M), 8. CCI Utility and Construction Services, LLC ($132M), 9. Burns & Mcdonnell Engineering Company, Inc. ($127M), 10. Parsons Corporation ($126M).

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