Top 100 Contractors in PSC C1AA: Architect and Engineering – Construction: Office Buildings, FY2023

Name: Top 100 Contractors in PSC C1AA: Architect and Engineering – Construction: Office Buildings, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 86% of FY2023 PSC C1AA contract dollars

Contract obligations: $1,121,631,601 Net of deobligations, by contracts coded PSC C1AA
Contractors: 204 Parent companies with an obligation
Largest contractor: B.l. Harbert Holdings, L.L.C. $840 million, 74.5% 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	B.l. Harbert Holdings, L.L.C. Through BL Harbert International LLC Top agencies DOS (Department of State)	$839,654,506	74.5%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2024 and not on the FY2025 list; unchanged since FY2022.
2	Insight Environmental Engineering & Construction, Inc. Top agencies USAF (Department of the Air Force)	$27,144,752	2.4%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #5 in FY2025; new.
3	Snow Kreilich Architects Inc. Top agencies GSA (General Services Administration)	$16,319,778	1.4%	Rank history: not on the FY2021 list, #100 in FY2022, #61 in FY2024 and #18 in FY2025; up 97 since FY2022.
4	Jacobs Engineering Group Inc. 4 awardees, including Ch2M Hill, Inc., Jacobs Government Services Company and Ch2M Hill - HDR JV Top agencies Army (Department of the Army) Treasury (Department of the Treasury) USAF (Department of the Air Force)	$16,251,935	1.4%	Rank history: #31 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 110 since FY2022.
5	Davis Brody Bond, LLP Top agencies GSA (General Services Administration)	$14,836,182	1.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
6	Davis Brody Bond-Spacesmith A Joint Venture Top agencies GSA (General Services Administration)	$14,243,115	1.3%	Rank history: not on the FY2021 list, #30 in FY2022, #45 in FY2024 and #19 in FY2025; up 24 since FY2022.
7	Camp Dresser & Mckee Inc. Through CDM Federal Programs Corporation Top agencies USAF (Department of the Air Force)	$10,084,517	0.9%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
8	Chickasaw Defense Logistics, LLC Top agencies Army (Department of the Army)	$9,992,900	0.9%	Rank history: #9 in FY2021, #4 in FY2022, #84 in FY2024 and not on the FY2025 list; down 4 since FY2022.
9	Jacobs Government Services Company Top agencies Army (Department of the Army) Navy (Department of the Navy)	$9,735,980	0.9%	Rank history: #19 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 123 since FY2022.
10	Trane U.S. Inc. Top agencies GSA (General Services Administration)	$8,645,203	0.8%	Rank history: #6 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
11	Caddell Construction Co., Inc. Through Caddell Construction Co. (De), LLC Top agencies DOS (Department of State)	$7,017,796	0.6%	Rank history: #14 in FY2021, #37 in FY2022, #62 in FY2024 and not on the FY2025 list; up 26 since FY2022.
12	AE Works Ltd Top agencies VA (Department of Veterans Affairs)	$6,557,620	0.6%	Rank history: #40 in FY2021, #41 in FY2022 and not on the FY2024–FY2025 lists; up 29 since FY2022.
13	Summer Consultants Inc Top agencies GSA (General Services Administration) SSA (Social Security Administration) Navy (Department of the Navy)	$6,228,533	0.6%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2024 and #31 in FY2025; new.
14	Parsons Corporation Through Parsons Government Services Inc. Top agencies DOL (Department of Labor)	$5,760,641	0.5%	Rank history: #3 in FY2021, #3 in FY2022, #9 in FY2024 and not on the FY2025 list; down 11 since FY2022.
15	Dattner Architects DPC Top agencies GSA (General Services Administration) DOJ (Department of Justice) SSA (Social Security Administration)	$5,650,326	0.5%	Rank history: #12 in FY2021, #22 in FY2022, #3 in FY2024 and #8 in FY2025; up 7 since FY2022.
16	Andrew C Chen 3 awardees Top agencies Navy (Department of the Navy) GSA (General Services Administration)	$5,577,244	0.5%	Rank history: #18 in FY2021, #17 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
17	Repaintex Company 2 awardees Top agencies USAID (US Agency for International Development) GSA (General Services Administration)	$5,429,014	0.5%	Rank history: not on the FY2021 list, #10 in FY2022 and not on the FY2024–FY2025 lists; down 7 since FY2022.
18	Line and Space, LLC Top agencies GSA (General Services Administration) AOUSC (Administrative Office of the U.S. Courts) DOJ (Department of Justice)	$5,302,242	0.5%	Rank history: #23 in FY2021, #33 in FY2022, #18 in FY2024 and #26 in FY2025; up 15 since FY2022.
19	Morphosis Architects Top agencies GSA (General Services Administration)	$5,180,056	0.5%	Rank history: #49 in FY2021, not on the FY2022 list, #60 in FY2024 and #45 in FY2025; returned.
20	Superstructures Engineering + Architecture, PLLC Top agencies GSA (General Services Administration)	$5,068,638	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
21	Mtfa Architecture, P.L.L.C. Top agencies Navy (Department of the Navy) GSA (General Services Administration)	$3,911,970	0.3%	Rank history: #43 in FY2021, #21 in FY2022, #12 in FY2024 and #16 in FY2025; unchanged since FY2022.
22	Nicklaus Engineering, Inc. Top agencies USAF (Department of the Air Force)	$3,263,177	0.3%	Rank history: not on the FY2021 list, #54 in FY2022 and not on the FY2024–FY2025 lists; up 32 since FY2022.
23	EXP U.S. Services Inc. 2 awardees, including EXP Federal Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army)	$3,087,309	0.3%	Rank history: not on the FY2021 list, #12 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
24	Grunley Construction Co., Inc. Top agencies USDA (Department of Agriculture)	$2,942,602	0.3%	Rank history: not on the FY2021 list, #2 in FY2022, #28 in FY2024 and #41 in FY2025; down 22 since FY2022.
25	N.k. Bhandari, Architecture & Engineering, P.C. Top agencies GSA (General Services Administration) DHS (Department of Homeland Security) HHS (Department of Health and Human Services)	$2,897,299	0.3%	Rank history: #56 in FY2021, #73 in FY2022, #14 in FY2024 and #15 in FY2025; up 48 since FY2022.
26	Desbuild Incorporated Top agencies DOS (Department of State)	$2,629,106	0.2%	Rank history: #8 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 76 since FY2022.
27	Atriax, P.L.L.C. Top agencies VA (Department of Veterans Affairs)	$2,527,470	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
28	Wiley & Wilson, Inc. Top agencies DOT (Department of Transportation)	$2,330,205	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #66 in FY2025; up 110 since FY2022.
29	Development One Inc Top agencies GSA (General Services Administration) DOJ (Department of Justice)	$2,310,883	0.2%	Rank history: not on the FY2021 list, #74 in FY2022, #26 in FY2024 and #93 in FY2025; up 45 since FY2022.
30	Mtfa Architecture, Inc. Top agencies Navy (Department of the Navy) DOS (Department of State)	$2,223,372	0.2%	Rank history: #36 in FY2021, #60 in FY2022, not on the FY2024 list and #12 in FY2025; up 30 since FY2022.
31	WSP E&I - Zapata Joint Venture Top agencies USAF (Department of the Air Force)	$2,141,977	0.2%	Rank history: not on the FY2021–FY2022 lists, #99 in FY2024 and #30 in FY2025; new.
32	Setty & Associates International PLLC Top agencies GSA (General Services Administration)	$2,014,503	0.2%	Rank history: #70 in FY2021, #26 in FY2022, #29 in FY2024 and not on the FY2025 list; down 6 since FY2022.
33	Ritter Norton Architects PLLC Top agencies DOS (Department of State) GSA (General Services Administration)	$1,903,420	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 77 since FY2022.
34	Above Group Inc. Top agencies VA (Department of Veterans Affairs)	$1,865,087	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
35	Bailey Edward Design, Inc. Top agencies GSA (General Services Administration) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$1,699,817	0.2%	Rank history: #46 in FY2021, #34 in FY2022, #37 in FY2024 and #59 in FY2025; down 1 since FY2022.
36	Interactive Design Inc. Top agencies GSA (General Services Administration) AOUSC (Administrative Office of the U.S. Courts) DOJ (Department of Justice)	$1,564,221	0.1%	Rank history: #48 in FY2021, not on the FY2022 list, not on the FY2024 list and #38 in FY2025; up 80 since FY2022.
37	Oak Point Associates Top agencies GSA (General Services Administration) DOS (Department of State) DOJ (Department of Justice)	$1,418,317	0.1%	Rank history: #24 in FY2021, #25 in FY2022, #41 in FY2024 and not on the FY2025 list; down 12 since FY2022.
38	The Johnson-Mcadams Firm, P.a. Top agencies USAF (Department of the Air Force) USDA (Department of Agriculture)	$1,410,488	0.1%	Rank history: not on the FY2021 list, #89 in FY2022, #90 in FY2024 and not on the FY2025 list; up 51 since FY2022.
39	HOK Group, Inc. Through Hellmuth, Obata & Kassabaum, Inc. Top agencies GSA (General Services Administration)	$1,407,996	0.1%	Rank history: #52 in FY2021, #65 in FY2022, #74 in FY2024 and not on the FY2025 list; up 26 since FY2022.
40	Rosche / 888 First Street, N.e. L.L.C. Top agencies DOE (Department of Energy)	$1,396,109	0.1%	Rank history: #37 in FY2021, #36 in FY2022, #32 in FY2024 and #27 in FY2025; down 4 since FY2022.
41	Global Engineering Solutions Inc. Top agencies GSA (General Services Administration)	$1,390,148	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
42	Wiley Wilson Burns & Mcdonnell Joint Venture Top agencies Navy (Department of the Navy) USUHS (DOD Uniformed Services University of the Health Sciences)	$1,265,744	0.1%	Rank history: #39 in FY2021, #58 in FY2022, #19 in FY2024 and #56 in FY2025; up 16 since FY2022.
43	Benham - Mead & Hunt Top agencies USAF (Department of the Air Force)	$1,207,123	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #24 in FY2025; new.
44	Seay Seay & Litchfield PC Top agencies USAF (Department of the Air Force)	$1,180,477	0.1%	Rank history: #27 in FY2021, #99 in FY2022, #72 in FY2024 and not on the FY2025 list; up 55 since FY2022.
45	Smith-Miller + Hawkinson Architects, LLP Top agencies GSA (General Services Administration)	$1,149,390	0.1%	Rank history: not on the FY2021 list, #18 in FY2022, #48 in FY2024 and #4 in FY2025; down 27 since FY2022.
46	Anderson Engineering of Minnesota, LLC Top agencies VA (Department of Veterans Affairs)	$1,118,828	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #28 in FY2025; up 170 since FY2022.
47	Erga Group Sal Top agencies DOS (Department of State)	$1,065,600	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #50 in FY2025; new.
48	I5 Design Group Inc. Top agencies OSD (Office of the Secretary of Defense)	$1,047,878	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
49	Gana-A' Yoo, Limited Through Kaiyuh Services, LLC Top agencies GSA (General Services Administration) EPA (Environmental Protection Agency)	$1,027,562	0.1%	Rank history: not on the FY2021 list, #28 in FY2022 and not on the FY2024–FY2025 lists; down 21 since FY2022.
50	Elevar Design Group Inc. Top agencies GSA (General Services Administration) DHS (Department of Homeland Security) SSA (Social Security Administration)	$1,016,885	0.1%	Rank history: #66 in FY2021, #67 in FY2022, #69 in FY2024 and #68 in FY2025; up 17 since FY2022.
51	AECOM Through AECOM Technical Services, Inc. Top agencies GSA (General Services Administration) DOT (Department of Transportation) DOI (Department of the Interior)	$1,002,716	0.1%	Rank history: #5 in FY2021, #11 in FY2022, #42 in FY2024 and not on the FY2025 list; down 40 since FY2022.
52	Imec Group, LLC Top agencies DOL (Department of Labor)	$968,532	0.1%	Rank history: #76 in FY2021, not on the FY2022 list, #55 in FY2024 and not on the FY2025 list; returned.
53	Legend Construction and Painting Inc. Top agencies USAF (Department of the Air Force)	$954,560	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
54	KOO LLC Top agencies GSA (General Services Administration) DOJ (Department of Justice) AOUSC (Administrative Office of the U.S. Courts)	$950,963	0.1%	Rank history: #88 in FY2021, #51 in FY2022, #50 in FY2024 and #98 in FY2025; down 3 since FY2022.
55	Wiss, Janney, Elstner Associates, Inc. Top agencies GSA (General Services Administration) SSA (Social Security Administration) AOUSC (Administrative Office of the U.S. Courts)	$948,994	0.1%	Rank history: not on the FY2021 list, #62 in FY2022, #24 in FY2024 and #44 in FY2025; up 7 since FY2022.
56	Enercon Ltd Top agencies GSA (General Services Administration) SSA (Social Security Administration) USDA (Department of Agriculture)	$925,634	0.1%	Rank history: #55 in FY2021, #59 in FY2022, #25 in FY2024 and #57 in FY2025; up 3 since FY2022.
57	EBL Engineers, LLC Top agencies GSA (General Services Administration) USAF (Department of the Air Force)	$912,251	0.1%	Rank history: #50 in FY2021, #53 in FY2022, #49 in FY2024 and not on the FY2025 list; down 4 since FY2022.
58	Impact Electric Services, LLC Top agencies DHS (Department of Homeland Security)	$886,760	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
59	Perkins Eastman Architects DPC Top agencies GSA (General Services Administration)	$848,811	0.1%	Rank history: #21 in FY2021, #55 in FY2022, #87 in FY2024 and not on the FY2025 list; down 4 since FY2022.
60	Bbix LLC Top agencies GSA (General Services Administration) Commerce (Department of Commerce) Treasury (Department of the Treasury)	$826,352	0.1%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2024 and #79 in FY2025; new.
61	Hollingsworth-Pack Corporation Top agencies DOS (Department of State)	$812,368	0.1%	Rank history: not on the FY2021 list, #94 in FY2022 and not on the FY2024–FY2025 lists; up 33 since FY2022.
62	Engenium Group L.L.C. Top agencies GSA (General Services Administration)	$790,552	0.1%	Rank history: #65 in FY2021, #77 in FY2022 and not on the FY2024–FY2025 lists; up 15 since FY2022.
63	G.h. Forbes Associates Architects, P.C. Top agencies GSA (General Services Administration) AOUSC (Administrative Office of the U.S. Courts) DOS (Department of State)	$780,109	0.1%	Rank history: #28 in FY2021, #50 in FY2022, #30 in FY2024 and #35 in FY2025; down 13 since FY2022.
64	Valhalla Engineering Group LLC Top agencies VA (Department of Veterans Affairs)	$764,054	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	Page Southerland Page, Inc. 2 awardees, including Page Federal Solutions, LLC Top agencies DOS (Department of State) DHS (Department of Homeland Security)	$709,124	0.1%	Rank history: not on the FY2021 list, #31 in FY2022, #63 in FY2024 and #17 in FY2025; down 34 since FY2022.
66	GBR Architects LLC Top agencies GSA (General Services Administration) HHS (Department of Health and Human Services)	$697,303	0.1%	Rank history: #30 in FY2021, #9 in FY2022 and not on the FY2024–FY2025 lists; down 57 since FY2022.
67	Perspectus Architecture LLC Top agencies AOUSC (Administrative Office of the U.S. Courts) GSA (General Services Administration) DOJ (Department of Justice)	$688,386	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #94 in FY2025; new.
68	Marvel Architects Landscape Architects Urban Designers PLLC Top agencies GSA (General Services Administration)	$672,182	0.1%	Rank history: not on the FY2021–FY2022 lists, #20 in FY2024 and #7 in FY2025; new.
69	Robert Siegel Top agencies DOS (Department of State)	$669,934	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #67 in FY2025; up 55 since FY2022.
70	Tunnell Spangler & Associates Inc. Top agencies USDA (Department of Agriculture)	$659,780	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
71	Mills & Schnoering Architects LLC Top agencies SSA (Social Security Administration) GSA (General Services Administration) HHS (Department of Health and Human Services)	$633,719	0.1%	Rank history: not on the FY2021 list, #64 in FY2022, #57 in FY2024 and not on the FY2025 list; down 7 since FY2022.
72	Tetra Tech, Inc. Top agencies DOS (Department of State)	$624,995	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #80 in FY2025; new.
73	Rmaa-Api Joint Venture, LLC Top agencies Navy (Department of the Navy)	$595,015	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 116 since FY2022.
74	Ocean Construction LLC Top agencies DOT (Department of Transportation)	$575,793	0.1%	Rank history: not on the FY2021 list, #13 in FY2022 and not on the FY2024–FY2025 lists; down 61 since FY2022.
75	Apogee Consulting Group, P.a. Top agencies VA (Department of Veterans Affairs)	$574,545	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
76	ECH Architecture PS Top agencies GSA (General Services Administration)	$558,891	<0.1%	Rank history: not on the FY2021 list, #93 in FY2022, #47 in FY2024 and not on the FY2025 list; up 17 since FY2022.
77	Native American Services Corp. Top agencies USAF (Department of the Air Force)	$539,267	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
78	EJC International Services LLC Top agencies USAGM (US Agency for Global Media)	$522,440	<0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #75 in FY2025; up 82 since FY2022.
79	Miller-Remick, LLC Top agencies GSA (General Services Administration)	$512,264	<0.1%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2024 and #61 in FY2025; up 26 since FY2022.
80	Engineering Design Management P.C. Top agencies GSA (General Services Administration) DHS (Department of Homeland Security) AOUSC (Administrative Office of the U.S. Courts)	$509,288	<0.1%	Rank history: #60 in FY2021, #76 in FY2022, #83 in FY2024 and not on the FY2025 list; down 4 since FY2022.
81	Design Partners, Incorporated Top agencies Navy (Department of the Navy)	$503,304	<0.1%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2024 and not on the FY2025 list; new.
82	K2A, LLP Top agencies GSA (General Services Administration)	$498,994	<0.1%	Rank history: #68 in FY2021, #45 in FY2022, #59 in FY2024 and not on the FY2025 list; down 37 since FY2022.
83	Raymond Pond Enterprise Solutions JV LLC Top agencies USAF (Department of the Air Force)	$496,251	<0.1%	Rank history: not on the FY2021 list, #68 in FY2022, #66 in FY2024 and not on the FY2025 list; down 15 since FY2022.
84	Habitek S.R.L. Top agencies DOS (Department of State)	$477,632	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
85	Iveco SUD-West Nutzfahrzeuge GMBH Through Ati, Inc. Top agencies HHS (Department of Health and Human Services)	$423,878	<0.1%	Rank history: #83 in FY2021, #69 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
86	Smithgroup Companies, Inc. 2 awardees, including Smithgroup, Inc. Top agencies EPA (Environmental Protection Agency) GSA (General Services Administration)	$402,011	<0.1%	Rank history: #10 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 89 since FY2022.
87	Baysinger-Bric JV Top agencies GSA (General Services Administration) DOJ (Department of Justice) DFAS (Defense Finance and Accounting Service)	$388,963	<0.1%	Rank history: #100 in FY2021, #42 in FY2022, #44 in FY2024 and #69 in FY2025; down 45 since FY2022.
88	Henry Adams, LLC Top agencies GSA (General Services Administration) SSA (Social Security Administration) HHS (Department of Health and Human Services)	$384,391	<0.1%	Rank history: #20 in FY2021, #44 in FY2022, #67 in FY2024 and not on the FY2025 list; down 44 since FY2022.
89	LEO a Daly and Huitt Zollars, a Joint Venture Through LEO A. Daly LLC Top agencies DOT (Department of Transportation) GSA (General Services Administration)	$364,155	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 15 since FY2022.
90	Fellenzer Engineering LLP Top agencies VA (Department of Veterans Affairs)	$339,904	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
91	MBF Architects, P.a. Top agencies Navy (Department of the Navy)	$337,802	<0.1%	Rank history: #42 in FY2021, not on the FY2022 list, #65 in FY2024 and not on the FY2025 list; returned.
92	Metro CD Engineering, LLC Top agencies GSA (General Services Administration)	$336,934	<0.1%	Rank history: #63 in FY2021, #81 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
93	Stone Group Architects, Inc. Top agencies VA (Department of Veterans Affairs)	$332,268	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	Architrave P.C. Top agencies GSA (General Services Administration)	$313,739	<0.1%	Rank history: not on the FY2021 list, #39 in FY2022, #39 in FY2024 and not on the FY2025 list; down 55 since FY2022.
95	Colby Co LLC Top agencies GSA (General Services Administration)	$300,399	<0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	KMA Architecture & Engineering Top agencies GSA (General Services Administration)	$299,150	<0.1%	Rank history: #61 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 67 since FY2022.
97	Steven Kahle Architects, Inc. Top agencies DHS (Department of Homeland Security) GSA (General Services Administration)	$294,458	<0.1%	Rank history: #67 in FY2021, #40 in FY2022, #58 in FY2024 and #99 in FY2025; down 57 since FY2022.
98	Schmidt-Prime Group, LLC Top agencies USAF (Department of the Air Force)	$284,012	<0.1%	Rank history: not on the FY2021 list, #96 in FY2022, not on the FY2024 list and #43 in FY2025; down 2 since FY2022.
99	Gushiken-Pae JV Top agencies Navy (Department of the Navy)	$283,758	<0.1%	Rank history: not on the FY2021 list, #56 in FY2022 and not on the FY2024–FY2025 lists; down 43 since FY2022.
100	Otak, Inc. Top agencies USDA (Department of Agriculture)	$281,313	<0.1%	Rank history: #82 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 95 since FY2022.

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100 of 204 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 $1.13 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 2023 ran Oct 1, 2022 – Sep 30, 2023. 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 FY2022. "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 FY2022 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 C1AA contractors in FY2023?

1. B.l. Harbert Holdings, L.L.C. ($840M), 2. Insight Environmental Engineering & Construction, Inc. ($27.1M), 3. Snow Kreilich Architects Inc. ($16.3M), 4. Jacobs Engineering Group Inc. ($16.3M), 5. Davis Brody Bond, LLP ($14.8M), 6. Davis Brody Bond-Spacesmith A Joint Venture ($14.2M), 7. Camp Dresser & Mckee Inc. ($10.1M), 8. Chickasaw Defense Logistics, LLC ($9.99M), 9. Jacobs Government Services Company ($9.74M), 10. Trane U.S. Inc. ($8.65M).

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