Top 100 Contractors in PSC C1DA: Architect and Engineering – Construction: Hospitals and Infirmaries, FY2023

Name: Top 100 Contractors in PSC C1DA: Architect and Engineering – Construction: Hospitals and Infirmaries, FY2023
Creator: GovTribe

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

The top 10 won 41% of FY2023 PSC C1DA contract dollars

Contract obligations: $365,946,057 Net of deobligations, by contracts coded PSC C1DA
Contractors: 183 Parent companies with an obligation
Largest contractor: LEO a Daly and Huitt Zollars, a Joint Venture $25.7 million, 6.8% 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	LEO a Daly and Huitt Zollars, a Joint Venture 2 awardees, including LEO A. Daly LLC Top agencies VA (Department of Veterans Affairs)	$25,714,457	6.8%	Rank history: #48 in FY2021, not on the FY2022 list, #59 in FY2024 and not on the FY2025 list; up 154 since FY2022.
2	Spees-Hernandez JV LLC Through Spees LLC Top agencies VA (Department of Veterans Affairs)	$24,278,596	6.4%	Rank history: #9 in FY2021, #3 in FY2022, #5 in FY2024 and #3 in FY2025; up 1 since FY2022.
3	Apogee Consulting Group, P.a. Top agencies VA (Department of Veterans Affairs)	$21,398,835	5.7%	Rank history: #2 in FY2021, #2 in FY2022, #15 in FY2024 and #2 in FY2025; down 1 since FY2022.
4	Stratton Straub Joint Venture LLC Top agencies VA (Department of Veterans Affairs)	$19,488,000	5.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
5	Specialized Engineering Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$14,898,234	4.0%	Rank history: #25 in FY2021, #12 in FY2022, #12 in FY2024 and #22 in FY2025; up 7 since FY2022.
6	Triple C-The A & E Group LLC Top agencies VA (Department of Veterans Affairs)	$13,098,981	3.5%	Rank history: #4 in FY2021, #7 in FY2022, #13 in FY2024 and #34 in FY2025; up 1 since FY2022.
7	Awen Solutions Group, LLC Top agencies VA (Department of Veterans Affairs)	$11,190,076	3.0%	Rank history: not on the FY2021 list, #10 in FY2022, #3 in FY2024 and #20 in FY2025; up 3 since FY2022.
8	Gdm-Ae, Inc. Top agencies VA (Department of Veterans Affairs)	$8,689,176	2.3%	Rank history: #12 in FY2021, #29 in FY2022, #44 in FY2024 and #17 in FY2025; up 21 since FY2022.
9	MRIGLOBAL Top agencies HHS (Department of Health and Human Services)	$8,362,058	2.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
10	FFE - Heapy JV, LLC Top agencies VA (Department of Veterans Affairs)	$8,204,148	2.2%	Rank history: #59 in FY2021, #17 in FY2022, #37 in FY2024 and #92 in FY2025; up 7 since FY2022.
11	RDC JPA Architecture, L.L.L.P. Top agencies VA (Department of Veterans Affairs)	$6,867,043	1.8%	Rank history: #41 in FY2021, #5 in FY2022, #7 in FY2024 and #13 in FY2025; down 6 since FY2022.
12	Elk Consortium LLC Top agencies VA (Department of Veterans Affairs)	$6,699,483	1.8%	Rank history: #70 in FY2021, #53 in FY2022, not on the FY2024 list and #43 in FY2025; up 41 since FY2022.
13	Spur Design LLC 2 awardees Top agencies VA (Department of Veterans Affairs)	$6,657,183	1.8%	Rank history: #6 in FY2021, #18 in FY2022, #14 in FY2024 and #5 in FY2025; up 5 since FY2022.
14	Aesus Design Group LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$6,260,746	1.7%	Rank history: #67 in FY2021, #19 in FY2022, #72 in FY2024 and #30 in FY2025; up 5 since FY2022.
15	Alesia Architecture PC Top agencies VA (Department of Veterans Affairs)	$6,002,767	1.6%	Rank history: #33 in FY2021, #23 in FY2022, #10 in FY2024 and #24 in FY2025; up 8 since FY2022.
16	Miller-Remick, LLC Top agencies VA (Department of Veterans Affairs)	$5,887,503	1.6%	Rank history: #15 in FY2021, #13 in FY2022, #8 in FY2024 and #4 in FY2025; down 3 since FY2022.
17	AE Works Ltd Top agencies VA (Department of Veterans Affairs)	$5,413,685	1.4%	Rank history: #64 in FY2021, #16 in FY2022, #4 in FY2024 and #28 in FY2025; down 1 since FY2022.
18	RTX Corporation Through Noresco, LLC Top agencies VA (Department of Veterans Affairs)	$5,089,642	1.3%	Rank history: #22 in FY2021, not on the FY2022 list, #25 in FY2024 and not on the FY2025 list; returned.
19	Acela Architects + Engineers PC Top agencies VA (Department of Veterans Affairs)	$5,020,460	1.3%	Rank history: #7 in FY2021, #38 in FY2022, #66 in FY2024 and #56 in FY2025; up 19 since FY2022.
20	Charlotte Engineers-Guidon JV LLC Top agencies VA (Department of Veterans Affairs)	$4,976,058	1.3%	Rank history: not on the FY2021–FY2022 lists, #24 in FY2024 and #94 in FY2025; new.
21	Valhalla Engineering Group LLC Top agencies VA (Department of Veterans Affairs)	$4,790,299	1.3%	Rank history: not on the FY2021–FY2022 lists, #6 in FY2024 and #8 in FY2025; up 131 since FY2022.
22	Stone Group Architects, Inc. Top agencies VA (Department of Veterans Affairs)	$4,774,526	1.3%	Rank history: #34 in FY2021, #34 in FY2022, #38 in FY2024 and #32 in FY2025; up 12 since FY2022.
23	CB Design Group, Inc. 3 awardees, including Bravo Zulu LLC Top agencies VA (Department of Veterans Affairs)	$4,750,026	1.3%	Rank history: #19 in FY2021, #8 in FY2022, #19 in FY2024 and #15 in FY2025; down 15 since FY2022.
24	Ameresco Inc. Top agencies VA (Department of Veterans Affairs)	$4,713,395	1.2%	Rank history: #11 in FY2021, #22 in FY2022, not on the FY2024 list and #14 in FY2025; down 2 since FY2022.
25	Thinkform Design Architect LLC Top agencies VA (Department of Veterans Affairs)	$4,690,749	1.2%	Rank history: #85 in FY2021, #35 in FY2022, #53 in FY2024 and #40 in FY2025; up 10 since FY2022.
26	Planate Management Group LLC Top agencies VA (Department of Veterans Affairs)	$4,636,471	1.2%	Rank history: #39 in FY2021, #51 in FY2022, #60 in FY2024 and #48 in FY2025; up 25 since FY2022.
27	Atriax, P.L.L.C. Top agencies VA (Department of Veterans Affairs)	$4,359,441	1.2%	Rank history: #18 in FY2021, #32 in FY2022, #57 in FY2024 and #85 in FY2025; up 5 since FY2022.
28	RGD Consulting Engineers Orlando LLC Top agencies VA (Department of Veterans Affairs)	$4,091,152	1.1%	Rank history: #95 in FY2021, not on the FY2022 list, #49 in FY2024 and #65 in FY2025; up 98 since FY2022.
29	Toland Mizell Molnar LLC 2 awardees Top agencies VA (Department of Veterans Affairs)	$4,073,945	1.1%	Rank history: #21 in FY2021, #15 in FY2022, #17 in FY2024 and #45 in FY2025; down 14 since FY2022.
30	Above Group Inc. Top agencies VA (Department of Veterans Affairs)	$4,042,862	1.1%	Rank history: #100 in FY2021, #46 in FY2022, #20 in FY2024 and #6 in FY2025; up 16 since FY2022.
31	Horsepower Geospatial LLC Top agencies VA (Department of Veterans Affairs)	$3,983,945	1.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Vali Cooper International LLC Top agencies VA (Department of Veterans Affairs)	$3,659,424	1.0%	Rank history: #30 in FY2021, not on the FY2022 list, #28 in FY2024 and #39 in FY2025; up 79 since FY2022.
33	Health Facility Solutions Company Top agencies VA (Department of Veterans Affairs)	$3,590,534	1.0%	Rank history: #27 in FY2021, #24 in FY2022, #11 in FY2024 and #16 in FY2025; down 9 since FY2022.
34	Anderson Engineering of Minnesota, LLC Top agencies VA (Department of Veterans Affairs)	$3,527,700	0.9%	Rank history: #13 in FY2021, #27 in FY2022, #23 in FY2024 and #29 in FY2025; down 7 since FY2022.
35	GEO. Bancroft Engineering LLC Top agencies VA (Department of Veterans Affairs)	$3,404,226	0.9%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2024 and #11 in FY2025; new.
36	Northeast Infrastructure LLC Top agencies VA (Department of Veterans Affairs)	$3,369,236	0.9%	Rank history: not on the FY2021–FY2022 lists, #21 in FY2024 and #18 in FY2025; new.
37	Blue Nose It Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$3,250,918	0.9%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #38 in FY2025; new.
38	Mccaslin & Associates, Architects, Inc. Top agencies VA (Department of Veterans Affairs)	$3,073,096	0.8%	Rank history: not on the FY2021 list, #89 in FY2022, #67 in FY2024 and not on the FY2025 list; up 51 since FY2022.
39	Guidon-Ses JV LLC Top agencies VA (Department of Veterans Affairs)	$3,071,109	0.8%	Rank history: not on the FY2021 list, #36 in FY2022, #80 in FY2024 and #68 in FY2025; down 3 since FY2022.
40	Capex Construction LLC Top agencies VA (Department of Veterans Affairs)	$3,015,594	0.8%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
41	Watson Engineering, PC Top agencies VA (Department of Veterans Affairs)	$2,726,440	0.7%	Rank history: not on the FY2021 list, #97 in FY2022, #56 in FY2024 and #60 in FY2025; up 56 since FY2022.
42	Mno-Bmadsen Through Seven Generations Architecture & Engineering LLC Top agencies HHS (Department of Health and Human Services)	$2,616,059	0.7%	Rank history: #24 in FY2021, #45 in FY2022 and not on the FY2024–FY2025 lists; up 3 since FY2022.
43	DAV Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$2,516,208	0.7%	Rank history: #45 in FY2021, #14 in FY2022, #32 in FY2024 and #7 in FY2025; down 29 since FY2022.
44	K.f. Davis Engineering, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$2,466,762	0.7%	Rank history: #96 in FY2021, #93 in FY2022, #27 in FY2024 and not on the FY2025 list; up 49 since FY2022.
45	West Point Engineers LLC Top agencies VA (Department of Veterans Affairs)	$2,282,446	0.6%	Rank history: #54 in FY2021, #28 in FY2022, #89 in FY2024 and #35 in FY2025; down 17 since FY2022.
46	Tls-Ces Services I, LLC Top agencies VA (Department of Veterans Affairs)	$2,102,580	0.6%	Rank history: #87 in FY2021, #11 in FY2022, #43 in FY2024 and #12 in FY2025; down 35 since FY2022.
47	Guidon-Charlotte Engineers Sdvosb JV LLC Top agencies VA (Department of Veterans Affairs)	$1,997,226	0.5%	Rank history: not on the FY2021 list, #31 in FY2022, #42 in FY2024 and #37 in FY2025; down 16 since FY2022.
48	Harrell Design Group PC Top agencies VA (Department of Veterans Affairs)	$1,977,126	0.5%	Rank history: #50 in FY2021, #81 in FY2022, #69 in FY2024 and #19 in FY2025; up 33 since FY2022.
49	H2B Inc. Top agencies VA (Department of Veterans Affairs)	$1,867,654	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 121 since FY2022.
50	Guidon-Cmta Sdvosb JV, LLC Top agencies VA (Department of Veterans Affairs)	$1,829,252	0.5%	Rank history: #58 in FY2021, not on the FY2022 list, #76 in FY2024 and not on the FY2025 list; up 55 since FY2022.
51	Penn Construction Group, Incorporated Top agencies VA (Department of Veterans Affairs)	$1,818,726	0.5%	Rank history: #69 in FY2021, #87 in FY2022, #58 in FY2024 and #55 in FY2025; up 36 since FY2022.
52	Johnson, Smitthipong & Rosamond Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$1,599,183	0.4%	Rank history: #20 in FY2021, #52 in FY2022, #30 in FY2024 and #25 in FY2025; unchanged since FY2022.
53	Guidon MES JV, LLC Top agencies VA (Department of Veterans Affairs)	$1,591,696	0.4%	Rank history: not on the FY2021 list, #92 in FY2022, #74 in FY2024 and #83 in FY2025; up 39 since FY2022.
54	M Plus Stone HFG LLC Top agencies VA (Department of Veterans Affairs)	$1,586,929	0.4%	Rank history: not on the FY2021 list, #70 in FY2022, #81 in FY2024 and not on the FY2025 list; up 16 since FY2022.
55	Alliance Steelhead JV LLC Top agencies VA (Department of Veterans Affairs)	$1,581,369	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 93 since FY2022.
56	Ballard Clc, Inc. Top agencies VA (Department of Veterans Affairs)	$1,423,724	0.4%	Rank history: not on the FY2021 list, #59 in FY2022, not on the FY2024 list and #63 in FY2025; up 3 since FY2022.
57	FFE Environmental Services Inc 2 awardees Top agencies VA (Department of Veterans Affairs)	$1,358,305	0.4%	Rank history: #16 in FY2021, #21 in FY2022, #31 in FY2024 and #26 in FY2025; down 36 since FY2022.
58	Blue Trident, LLC Top agencies VA (Department of Veterans Affairs)	$1,253,915	0.3%	Rank history: #53 in FY2021, #44 in FY2022, #41 in FY2024 and #66 in FY2025; down 14 since FY2022.
59	Fellenzer Engineering LLP Top agencies VA (Department of Veterans Affairs)	$1,251,968	0.3%	Rank history: #36 in FY2021, #63 in FY2022, #96 in FY2024 and #51 in FY2025; up 4 since FY2022.
60	AES Group Inc. Top agencies VA (Department of Veterans Affairs)	$1,211,023	0.3%	Rank history: #51 in FY2021, #74 in FY2022, #36 in FY2024 and #54 in FY2025; up 14 since FY2022.
61	Mabbett & Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$1,207,480	0.3%	Rank history: #88 in FY2021, not on the FY2022 list, #95 in FY2024 and not on the FY2025 list; up 49 since FY2022.
62	Akea Design, Inc. Top agencies VA (Department of Veterans Affairs)	$1,195,440	0.3%	Rank history: #91 in FY2021, #48 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
63	Obrien Engineering Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$1,168,224	0.3%	Rank history: #37 in FY2021, #41 in FY2022, #65 in FY2024 and #62 in FY2025; down 22 since FY2022.
64	Nest Engineering LLC Top agencies VA (Department of Veterans Affairs)	$1,122,676	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #98 in FY2025; new.
65	Fourfront Design Inc. Top agencies VA (Department of Veterans Affairs)	$1,104,650	0.3%	Rank history: #55 in FY2021, #43 in FY2022, #35 in FY2024 and #41 in FY2025; down 22 since FY2022.
66	Rdc+Ea, L.L.L.P. Top agencies VA (Department of Veterans Affairs)	$1,098,851	0.3%	Rank history: not on the FY2021 list, #47 in FY2022, #33 in FY2024 and #52 in FY2025; down 19 since FY2022.
67	Alliance Consulting Group Seven Generations AE JV LLC Top agencies VA (Department of Veterans Affairs)	$1,061,251	0.3%	Rank history: #14 in FY2021, #77 in FY2022, #40 in FY2024 and #81 in FY2025; up 10 since FY2022.
68	Alares LLC Top agencies VA (Department of Veterans Affairs)	$1,015,735	0.3%	Rank history: #62 in FY2021, #65 in FY2022, #62 in FY2024 and not on the FY2025 list; down 3 since FY2022.
69	Schwab, Jerome Top agencies VA (Department of Veterans Affairs)	$966,744	0.3%	Rank history: not on the FY2021 list, #68 in FY2022, #85 in FY2024 and #80 in FY2025; down 1 since FY2022.
70	Stone HFG Architecture, LLC Top agencies VA (Department of Veterans Affairs)	$959,182	0.3%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2024 and not on the FY2025 list; new.
71	Honor Service Company Top agencies VA (Department of Veterans Affairs)	$951,697	0.3%	Rank history: not on the FY2021 list, #86 in FY2022, #87 in FY2024 and #47 in FY2025; up 15 since FY2022.
72	PRW Architecture, Inc. Top agencies HHS (Department of Health and Human Services)	$914,311	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #89 in FY2025; up 62 since FY2022.
73	Davy Architecture, Inc. Top agencies VA (Department of Veterans Affairs)	$893,381	0.2%	Rank history: #31 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 103 since FY2022.
74	Tesla Laboratories Inc. Top agencies VA (Department of Veterans Affairs)	$850,903	0.2%	Rank history: not on the FY2021 list, #71 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
75	Raymond Pond Sdvosb JV, LLC Top agencies VA (Department of Veterans Affairs)	$815,641	0.2%	Rank history: not on the FY2021 list, #39 in FY2022, #88 in FY2024 and not on the FY2025 list; down 36 since FY2022.
76	Derby Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$753,953	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
77	Short Elliott Hendrickson - Himalayan Consultants JV LLC Top agencies HHS (Department of Health and Human Services)	$741,209	0.2%	Rank history: not on the FY2021 list, #64 in FY2022 and not on the FY2024–FY2025 lists; down 13 since FY2022.
78	Berners-Schober Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$732,413	0.2%	Rank history: #68 in FY2021, #67 in FY2022, #98 in FY2024 and #58 in FY2025; down 11 since FY2022.
79	Toland & Mizell Architects, Inc. Top agencies VA (Department of Veterans Affairs)	$722,779	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
80	Charlotte Engineers, LLP Top agencies VA (Department of Veterans Affairs)	$716,107	0.2%	Rank history: #99 in FY2021, #37 in FY2022, #34 in FY2024 and #64 in FY2025; down 43 since FY2022.
81	Wbrc Inc. Top agencies VA (Department of Veterans Affairs)	$634,410	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
82	L2E-Oculus JV Top agencies VA (Department of Veterans Affairs)	$616,236	0.2%	Rank history: not on the FY2021 list, #72 in FY2022, #45 in FY2024 and #73 in FY2025; down 10 since FY2022.
83	Burns Wald-Hopkins Shambach Architects, Inc. Top agencies HHS (Department of Health and Human Services)	$588,080	0.2%	Rank history: #97 in FY2021, #50 in FY2022, #94 in FY2024 and #76 in FY2025; down 33 since FY2022.
84	Encorus Group Engineering, P.C. Top agencies VA (Department of Veterans Affairs)	$568,285	0.2%	Rank history: #43 in FY2021, #56 in FY2022, #46 in FY2024 and not on the FY2025 list; down 28 since FY2022.
85	Castle Hill Associates, LLC Top agencies VA (Department of Veterans Affairs)	$527,683	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
86	Consolidated Edison Through RWE Clean Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$524,359	0.1%	Rank history: #76 in FY2021, #1 in FY2022, #92 in FY2024 and not on the FY2025 list; down 85 since FY2022.
87	Nagel Services LLC 2 awardees, including Nagel Architects, A Series of Nagel Services LLC Top agencies VA (Department of Veterans Affairs)	$521,450	0.1%	Rank history: #29 in FY2021, #96 in FY2022, not on the FY2024 list and #57 in FY2025; up 9 since FY2022.
88	Paradigm Engineers and Constructors, PLLC 5 awardees Top agencies VA (Department of Veterans Affairs)	$507,848	0.1%	Rank history: #57 in FY2021, #30 in FY2022, #47 in FY2024 and #78 in FY2025; down 58 since FY2022.
89	Utility Systems Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$474,950	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
90	LRS Federal LLC Top agencies VA (Department of Veterans Affairs)	$466,700	0.1%	Rank history: #47 in FY2021, #60 in FY2022 and not on the FY2024–FY2025 lists; down 30 since FY2022.
91	A Professional Corporation Lachin Architects Top agencies VA (Department of Veterans Affairs)	$460,600	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	SJS Executives LLC Top agencies VA (Department of Veterans Affairs)	$458,848	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #79 in FY2025; new.
93	Hdr, Inc. 4 awardees, including HDR Architecture Inc. and HDR Engineering Inc. Top agencies VA (Department of Veterans Affairs) Army (Department of the Army)	$446,610	0.1%	Rank history: #74 in FY2021, #42 in FY2022, not on the FY2024 list and #61 in FY2025; down 51 since FY2022.
94	National Facility Solutions LLC Through Enviros LLC Top agencies VA (Department of Veterans Affairs)	$445,896	0.1%	Rank history: not on the FY2021 list, #54 in FY2022, #18 in FY2024 and #96 in FY2025; down 40 since FY2022.
95	Beaufort Engineering Services, Inc. 2 awardees Top agencies VA (Department of Veterans Affairs)	$442,380	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 46 since FY2022.
96	Guidon Design Inc. Top agencies VA (Department of Veterans Affairs)	$420,275	0.1%	Rank history: #10 in FY2021, #26 in FY2022, #82 in FY2024 and #31 in FY2025; down 70 since FY2022.
97	Enapay, LLC Top agencies VA (Department of Veterans Affairs)	$381,107	0.1%	Rank history: #52 in FY2021, #82 in FY2022, #73 in FY2024 and #97 in FY2025; down 15 since FY2022.
98	Rock Gap Engineering LLC Top agencies HHS (Department of Health and Human Services)	$367,912	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 31 since FY2022.
99	Walter Mechanical Services Inc. Top agencies VA (Department of Veterans Affairs)	$357,509	0.1%	Rank history: #72 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 67 since FY2022.
100	Contract and Purchasing Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$353,775	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

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100 of 183 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 $377 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 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 C1DA contractors in FY2023?

1. LEO a Daly and Huitt Zollars, a Joint Venture ($25.7M), 2. Spees-Hernandez JV LLC ($24.3M), 3. Apogee Consulting Group, P.a. ($21.4M), 4. Stratton Straub Joint Venture LLC ($19.5M), 5. Specialized Engineering Solutions Inc. ($14.9M), 6. Triple C-The A & E Group LLC ($13.1M), 7. Awen Solutions Group, LLC ($11.2M), 8. Gdm-Ae, Inc. ($8.69M), 9. MRIGLOBAL ($8.36M), 10. FFE - Heapy JV, LLC ($8.2M).

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