Top 100 Contractors in PSC C1DA: Architect and Engineering – Construction: Hospitals and Infirmaries, FY2021

Name: Top 100 Contractors in PSC C1DA: Architect and Engineering – Construction: Hospitals and Infirmaries, FY2021
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 31% of FY2021 PSC C1DA contract dollars

Contract obligations: $250,638,125 Net of deobligations, by contracts coded PSC C1DA
Contractors: 188 Parent companies with an obligation
Largest contractor: Noresco LLC $10.4 million, 3.9% 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	Noresco LLC 2 awardees Top agencies VA (Department of Veterans Affairs)	$10,374,415	3.9%	Rank history: #6 in FY2022, not on the FY2023 list, #63 in FY2024 and #10 in FY2025; up 3 since FY2020.
2	Apogee Consulting Group, P.a. Top agencies VA (Department of Veterans Affairs)	$9,654,883	3.6%	Rank history: #2 in FY2022, #3 in FY2023, #15 in FY2024 and #2 in FY2025; up 5 since FY2020.
3	GEO Bancroft Engineering LLC Top agencies VA (Department of Veterans Affairs)	$9,457,833	3.6%	Rank history: #4 in FY2022 and not on the FY2023–FY2025 lists; up 14 since FY2020.
4	Triple C-The A & E Group LLC Top agencies VA (Department of Veterans Affairs)	$8,682,920	3.3%	Rank history: #7 in FY2022, #6 in FY2023, #13 in FY2024 and #34 in FY2025; up 5 since FY2020.
5	Valhalla Engineering Group, LLC Top agencies VA (Department of Veterans Affairs)	$8,558,674	3.2%	Rank history: #20 in FY2022 and not on the FY2023–FY2025 lists; up 8 since FY2020.
6	Spur Design, LLC Top agencies VA (Department of Veterans Affairs)	$8,270,446	3.1%	Rank history: #18 in FY2022, #13 in FY2023, #14 in FY2024 and #5 in FY2025; up 66 since FY2020.
7	Acela Architects + Engineers PC Top agencies VA (Department of Veterans Affairs)	$7,890,441	3.0%	Rank history: #38 in FY2022, #19 in FY2023, #66 in FY2024 and #56 in FY2025; up 23 since FY2020.
8	Health Facilities Group LLC Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$7,309,748	2.7%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
9	Spees-Hernandez JV LLC Through Spees LLC Top agencies VA (Department of Veterans Affairs)	$6,973,258	2.6%	Rank history: #3 in FY2022, #2 in FY2023, #5 in FY2024 and #3 in FY2025; new, not ranked in FY2020.
10	Guidon Design Inc. Top agencies VA (Department of Veterans Affairs)	$6,693,981	2.5%	Rank history: #26 in FY2022, #96 in FY2023, #82 in FY2024 and #31 in FY2025; up 14 since FY2020.
11	Ameresco Inc. Top agencies VA (Department of Veterans Affairs)	$6,608,103	2.5%	Rank history: #22 in FY2022, #24 in FY2023, not on the FY2024 list and #14 in FY2025; up 62 since FY2020.
12	Gdm-Ae, Inc. Top agencies VA (Department of Veterans Affairs)	$6,502,385	2.4%	Rank history: #29 in FY2022, #8 in FY2023, #44 in FY2024 and #17 in FY2025; up 98 since FY2020.
13	Anderson Engineering of Minnesota, LLC Top agencies VA (Department of Veterans Affairs)	$6,282,105	2.4%	Rank history: #27 in FY2022, #34 in FY2023, #23 in FY2024 and #29 in FY2025; up 5 since FY2020.
14	Alliance Consulting Group Seven Generations AE JV LLC Top agencies VA (Department of Veterans Affairs)	$5,384,891	2.0%	Rank history: #77 in FY2022, #67 in FY2023, #40 in FY2024 and #81 in FY2025; up 19 since FY2020.
15	Miller-Remick, LLC Top agencies VA (Department of Veterans Affairs)	$4,839,154	1.8%	Rank history: #13 in FY2022, #16 in FY2023, #8 in FY2024 and #4 in FY2025; down 12 since FY2020.
16	FFE Environmental Services Inc. Top agencies VA (Department of Veterans Affairs)	$4,823,114	1.8%	Rank history: #21 in FY2022, #57 in FY2023, #31 in FY2024 and #26 in FY2025; down 8 since FY2020.
17	Apogee-Cems JV LLC Top agencies VA (Department of Veterans Affairs)	$4,673,383	1.8%	Rank history: not on the FY2022–FY2023 lists, #77 in FY2024 and not on the FY2025 list; up 139 since FY2020.
18	Atriax, P.L.L.C. Top agencies VA (Department of Veterans Affairs)	$4,241,127	1.6%	Rank history: #32 in FY2022, #27 in FY2023, #57 in FY2024 and #85 in FY2025; up 3 since FY2020.
19	CB Design Group, Inc. Top agencies VA (Department of Veterans Affairs)	$4,005,732	1.5%	Rank history: #8 in FY2022, #23 in FY2023, #19 in FY2024 and #15 in FY2025; down 7 since FY2020.
20	Johnson, Smitthipong & Rosamond Associates, Inc. Top agencies HHS (Department of Health and Human Services)	$3,867,363	1.5%	Rank history: #52 in FY2022, #52 in FY2023, #30 in FY2024 and #25 in FY2025; up 62 since FY2020.
21	Toland Mizell Molnar LLC Top agencies VA (Department of Veterans Affairs)	$3,752,821	1.4%	Rank history: #15 in FY2022, #29 in FY2023, #17 in FY2024 and #45 in FY2025; down 2 since FY2020.
22	RTX Corporation Through Noresco, LLC Top agencies VA (Department of Veterans Affairs)	$3,576,536	1.3%	Rank history: not on the FY2022 list, #18 in FY2023, #25 in FY2024 and not on the FY2025 list; down 2 since FY2020.
23	William Pevear Architects, Inc. Top agencies VA (Department of Veterans Affairs)	$3,405,704	1.3%	Rank history: not on the FY2022–FY2025 lists; up 44 since FY2020.
24	Mno-Bmadsen Through Seven Generations Architecture & Engineering LLC Top agencies HHS (Department of Health and Human Services)	$3,248,444	1.2%	Rank history: #45 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
25	Specialized Engineering Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$3,190,538	1.2%	Rank history: #12 in FY2022, #5 in FY2023, #12 in FY2024 and #22 in FY2025; up 55 since FY2020.
26	RDC / John POE Architects, L.L.L.P. Top agencies VA (Department of Veterans Affairs)	$2,980,183	1.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; up 48 since FY2020.
27	Health Facility Solutions Company Top agencies VA (Department of Veterans Affairs)	$2,848,206	1.1%	Rank history: #24 in FY2022, #33 in FY2023, #11 in FY2024 and #16 in FY2025; up 135 since FY2020.
28	Concourse Federal Group LLC Top agencies VA (Department of Veterans Affairs)	$2,781,118	1.0%	Rank history: not on the FY2022–FY2025 lists; up 17 since FY2020.
29	Nagel Services LLC 2 awardees, including Nagel Architects, A Series of Nagel Services LLC Top agencies VA (Department of Veterans Affairs)	$2,722,439	1.0%	Rank history: #96 in FY2022, #87 in FY2023, not on the FY2024 list and #57 in FY2025; up 14 since FY2020.
30	Vali Cooper International LLC Top agencies VA (Department of Veterans Affairs)	$2,704,577	1.0%	Rank history: not on the FY2022 list, #32 in FY2023, #28 in FY2024 and #39 in FY2025; up 73 since FY2020.
31	Davy Architecture, Inc. Top agencies VA (Department of Veterans Affairs)	$2,563,975	1.0%	Rank history: not on the FY2022 list, #73 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
32	Romanyk Consulting Corporation Top agencies VA (Department of Veterans Affairs)	$2,548,711	1.0%	Rank history: #25 in FY2022 and not on the FY2023–FY2025 lists; up 25 since FY2020.
33	Alesia Architecture PC Top agencies VA (Department of Veterans Affairs)	$2,430,388	0.9%	Rank history: #23 in FY2022, #15 in FY2023, #10 in FY2024 and #24 in FY2025; down 11 since FY2020.
34	Stone Group Architects, Inc. Top agencies VA (Department of Veterans Affairs)	$2,415,819	0.9%	Rank history: #34 in FY2022, #22 in FY2023, #38 in FY2024 and #32 in FY2025; down 3 since FY2020.
35	Schneider Electric Buildings Americas Inc. Top agencies VA (Department of Veterans Affairs)	$2,413,184	0.9%	Rank history: #33 in FY2022 and not on the FY2023–FY2025 lists; down 34 since FY2020.
36	Fellenzer Engineering LLP Top agencies VA (Department of Veterans Affairs)	$2,292,197	0.9%	Rank history: #63 in FY2022, #59 in FY2023, #96 in FY2024 and #51 in FY2025; down 1 since FY2020.
37	Obrien Engineering Inc. Top agencies VA (Department of Veterans Affairs)	$2,041,378	0.8%	Rank history: #41 in FY2022, #63 in FY2023, #65 in FY2024 and #62 in FY2025; up 42 since FY2020.
38	Spees LLC Top agencies VA (Department of Veterans Affairs)	$1,991,552	0.7%	Rank history: #9 in FY2022 and not on the FY2023–FY2025 lists; down 22 since FY2020.
39	Planate Management Group LLC Top agencies VA (Department of Veterans Affairs)	$1,776,277	0.7%	Rank history: #51 in FY2022, #26 in FY2023, #60 in FY2024 and #48 in FY2025; up 2 since FY2020.
40	Damberg Scott Gerzina Wagner Architects, Inc. Top agencies HHS (Department of Health and Human Services)	$1,763,033	0.7%	Rank history: #80 in FY2022, not on the FY2023 list, #75 in FY2024 and not on the FY2025 list; up 57 since FY2020.
41	RDC JPA Architecture, L.L.L.P. Top agencies VA (Department of Veterans Affairs)	$1,689,562	0.6%	Rank history: #5 in FY2022, #11 in FY2023, #7 in FY2024 and #13 in FY2025; up 81 since FY2020.
42	A Design Group LLC Top agencies VA (Department of Veterans Affairs)	$1,678,449	0.6%	Rank history: not on the FY2022–FY2024 lists and #50 in FY2025; up 100 since FY2020.
43	Encorus Group Engineering, P.C. Top agencies VA (Department of Veterans Affairs)	$1,646,715	0.6%	Rank history: #56 in FY2022, #84 in FY2023, #46 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
44	The Innova Group, LLC Top agencies HHS (Department of Health and Human Services)	$1,604,673	0.6%	Rank history: #57 in FY2022 and not on the FY2023–FY2025 lists; down 18 since FY2020.
45	DAV Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$1,588,039	0.6%	Rank history: #14 in FY2022, #43 in FY2023, #32 in FY2024 and #7 in FY2025; up 3 since FY2020.
46	Strollo & Strollo LLC Top agencies VA (Department of Veterans Affairs)	$1,580,076	0.6%	Rank history: not on the FY2022–FY2025 lists; up 19 since FY2020.
47	LRS Federal LLC Top agencies VA (Department of Veterans Affairs)	$1,536,507	0.6%	Rank history: #60 in FY2022, #90 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2020.
48	LEO a Daly and Huitt Zollars, a Joint Venture 2 awardees, including LEO A. Daly LLC Top agencies VA (Department of Veterans Affairs)	$1,505,280	0.6%	Rank history: not on the FY2022 list, #1 in FY2023, #59 in FY2024 and not on the FY2025 list; down 42 since FY2020.
49	NPD Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$1,431,222	0.5%	Rank history: #95 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
50	Harrell Design Group PC Top agencies VA (Department of Veterans Affairs)	$1,348,044	0.5%	Rank history: #81 in FY2022, #48 in FY2023, #69 in FY2024 and #19 in FY2025; up 42 since FY2020.
51	AES Group Inc. Top agencies VA (Department of Veterans Affairs)	$1,342,584	0.5%	Rank history: #74 in FY2022, #60 in FY2023, #36 in FY2024 and #54 in FY2025; up 5 since FY2020.
52	Enapay, LLC Top agencies VA (Department of Veterans Affairs)	$1,315,898	0.5%	Rank history: #82 in FY2022, #97 in FY2023, #73 in FY2024 and #97 in FY2025; up 46 since FY2020.
53	Blue Trident, LLC Top agencies VA (Department of Veterans Affairs)	$1,199,233	0.5%	Rank history: #44 in FY2022, #58 in FY2023, #41 in FY2024 and #66 in FY2025; up 54 since FY2020.
54	West Point Engineers LLC Top agencies VA (Department of Veterans Affairs)	$1,193,866	0.4%	Rank history: #28 in FY2022, #45 in FY2023, #89 in FY2024 and #35 in FY2025; new, not ranked in FY2020.
55	Fourfront Design Inc. Top agencies VA (Department of Veterans Affairs)	$1,191,844	0.4%	Rank history: #43 in FY2022, #65 in FY2023, #35 in FY2024 and #41 in FY2025; down 32 since FY2020.
56	Veteran Design & Construction Inc. Top agencies VA (Department of Veterans Affairs)	$1,191,165	0.4%	Rank history: not on the FY2022–FY2025 lists; up 73 since FY2020.
57	Paradigm Engineers and Constructors, PLLC 3 awardees Top agencies VA (Department of Veterans Affairs)	$1,182,384	0.4%	Rank history: #30 in FY2022, #88 in FY2023, #47 in FY2024 and #78 in FY2025; down 32 since FY2020.
58	Guidon-Cmta Sdvosb JV, LLC Top agencies VA (Department of Veterans Affairs)	$1,181,860	0.4%	Rank history: not on the FY2022 list, #50 in FY2023, #76 in FY2024 and not on the FY2025 list; up 12 since FY2020.
59	FFE - Heapy JV, LLC Top agencies VA (Department of Veterans Affairs)	$1,175,658	0.4%	Rank history: #17 in FY2022, #10 in FY2023, #37 in FY2024 and #92 in FY2025; new, not ranked in FY2020.
60	Shadpour Consulting Engineers Top agencies VA (Department of Veterans Affairs)	$1,126,509	0.4%	Rank history: not on the FY2022–FY2025 lists; down 31 since FY2020.
61	Beekman Point Engineering, LLC Top agencies VA (Department of Veterans Affairs)	$1,111,630	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
62	Alares LLC Top agencies VA (Department of Veterans Affairs)	$1,094,010	0.4%	Rank history: #65 in FY2022, #68 in FY2023, #62 in FY2024 and not on the FY2025 list; unchanged since FY2020.
63	Spur Sbbl Collaborative JV, Inc. Top agencies VA (Department of Veterans Affairs)	$1,092,561	0.4%	Rank history: not on the FY2022–FY2025 lists; down 23 since FY2020.
64	AE Works Ltd Top agencies VA (Department of Veterans Affairs)	$1,086,967	0.4%	Rank history: #16 in FY2022, #17 in FY2023, #4 in FY2024 and #28 in FY2025; up 12 since FY2020.
65	Monument Engineering Group Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$1,058,419	0.4%	Rank history: not on the FY2022–FY2024 lists and #88 in FY2025; down 11 since FY2020.
66	Viridian Architectural Design Inc. Top agencies VA (Department of Veterans Affairs)	$1,056,080	0.4%	Rank history: #62 in FY2022 and not on the FY2023–FY2025 lists; down 52 since FY2020.
67	Aesus Design Group LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services)	$1,005,521	0.4%	Rank history: #19 in FY2022, #14 in FY2023, #72 in FY2024 and #30 in FY2025; up 67 since FY2020.
68	Berners-Schober Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$982,091	0.4%	Rank history: #67 in FY2022, #78 in FY2023, #98 in FY2024 and #58 in FY2025; up 3 since FY2020.
69	Penn Construction Group, Incorporated Top agencies VA (Department of Veterans Affairs)	$973,647	0.4%	Rank history: #87 in FY2022, #51 in FY2023, #58 in FY2024 and #55 in FY2025; up 35 since FY2020.
70	Elk Consortium LLC Top agencies VA (Department of Veterans Affairs)	$953,246	0.4%	Rank history: #53 in FY2022, #12 in FY2023, not on the FY2024 list and #43 in FY2025; new, not ranked in FY2020.
71	Dublin EDT JV, LLC Top agencies VA (Department of Veterans Affairs)	$863,416	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
72	Walter Mechanical Services Inc. Top agencies VA (Department of Veterans Affairs)	$862,923	0.3%	Rank history: not on the FY2022 list, #99 in FY2023 and not on the FY2024–FY2025 lists; down 26 since FY2020.
73	Derby Enterprises LLC Top agencies VA (Department of Veterans Affairs)	$852,663	0.3%	Rank history: #40 in FY2022, not on the FY2023 list, #39 in FY2024 and #33 in FY2025; up 51 since FY2020.
74	Hdr, Inc. 3 awardees, including HDR Engineering Inc. and HDR Architecture Inc. Top agencies OSD (Office of the Secretary of Defense)	$849,722	0.3%	Rank history: #42 in FY2022, #93 in FY2023, not on the FY2024 list and #61 in FY2025; down 64 since FY2020.
75	Schwab-Kal JV Joint Venture Top agencies VA (Department of Veterans Affairs)	$846,837	0.3%	Rank history: not on the FY2022–FY2025 lists; down 6 since FY2020.
76	Consolidated Edison Through RWE Clean Energy Solutions, Inc. Top agencies VA (Department of Veterans Affairs)	$841,692	0.3%	Rank history: #1 in FY2022, #86 in FY2023, #92 in FY2024 and not on the FY2025 list; down 74 since FY2020.
77	Johnsondanforth, Inc. Top agencies VA (Department of Veterans Affairs)	$817,724	0.3%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
78	Barry Davis Architects PC Top agencies VA (Department of Veterans Affairs)	$799,857	0.3%	Rank history: not on the FY2022–FY2025 lists; up 97 since FY2020.
79	Wbrc Architects Engineers Top agencies VA (Department of Veterans Affairs)	$787,283	0.3%	Rank history: not on the FY2022–FY2025 lists; down 26 since FY2020.
80	Lavastida Development Group, L.l.c Top agencies VA (Department of Veterans Affairs)	$732,184	0.3%	Rank history: #98 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
81	R2C Inc. Through R2C Limited Liability Company Top agencies VA (Department of Veterans Affairs)	$725,704	0.3%	Rank history: #94 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
82	Northeast Infrastructure LLC Top agencies VA (Department of Veterans Affairs)	$714,091	0.3%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; down 50 since FY2020.
83	Virtual Energy Solutions Inc. Top agencies VA (Department of Veterans Affairs)	$713,166	0.3%	Rank history: not on the FY2022–FY2025 lists; up 38 since FY2020.
84	Enviros LLC Top agencies VA (Department of Veterans Affairs)	$679,599	0.3%	Rank history: #76 in FY2022 and not on the FY2023–FY2025 lists; down 18 since FY2020.
85	Thinkform Design Architect LLC Top agencies VA (Department of Veterans Affairs)	$618,156	0.2%	Rank history: #35 in FY2022, #25 in FY2023, #53 in FY2024 and #40 in FY2025; up 16 since FY2020.
86	LRS Paradigm Engineers LLC Top agencies VA (Department of Veterans Affairs)	$613,560	0.2%	Rank history: not on the FY2022–FY2025 lists; up 8 since FY2020.
87	Tls-Ces Services I, LLC Top agencies VA (Department of Veterans Affairs)	$578,989	0.2%	Rank history: #11 in FY2022, #46 in FY2023, #43 in FY2024 and #12 in FY2025; down 82 since FY2020.
88	Mabbett & Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$574,006	0.2%	Rank history: not on the FY2022 list, #61 in FY2023, #95 in FY2024 and not on the FY2025 list; up 73 since FY2020.
89	Jackson Mechanical Service Inc. Top agencies VA (Department of Veterans Affairs)	$542,927	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
90	M Plus HFG LLC Top agencies VA (Department of Veterans Affairs)	$526,575	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
91	Akea Design, Inc. Top agencies VA (Department of Veterans Affairs)	$525,738	0.2%	Rank history: #48 in FY2022, #62 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
92	Wesseldyk and Associates, Inc. Top agencies VA (Department of Veterans Affairs)	$523,107	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
93	Raymond Global, Inc. Top agencies VA (Department of Veterans Affairs)	$456,570	0.2%	Rank history: #61 in FY2022 and not on the FY2023–FY2025 lists; down 46 since FY2020.
94	Cox Design Associates Inc. Top agencies VA (Department of Veterans Affairs)	$429,411	0.2%	Rank history: #79 in FY2022 and not on the FY2023–FY2025 lists; down 43 since FY2020.
95	RGD Consulting Engineers Orlando LLC Top agencies VA (Department of Veterans Affairs)	$419,648	0.2%	Rank history: not on the FY2022 list, #28 in FY2023, #49 in FY2024 and #65 in FY2025; new, not ranked in FY2020.
96	K.f. Davis Engineering, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs)	$387,153	0.1%	Rank history: #93 in FY2022, #44 in FY2023, #27 in FY2024 and not on the FY2025 list; down 12 since FY2020.
97	Burns Wald-Hopkins Shambach Architects, Inc. Top agencies HHS (Department of Health and Human Services)	$385,353	0.1%	Rank history: #50 in FY2022, #83 in FY2023, #94 in FY2024 and #76 in FY2025; down 1 since FY2020.
98	Odell International, LLC Top agencies VA (Department of Veterans Affairs)	$377,565	0.1%	Rank history: #49 in FY2022 and not on the FY2023–FY2025 lists; up 34 since FY2020.
99	Charlotte Engineers, LLP Top agencies VA (Department of Veterans Affairs)	$339,612	0.1%	Rank history: #37 in FY2022, #80 in FY2023, #34 in FY2024 and #64 in FY2025; unchanged since FY2020.
100	Above Group Inc. Top agencies VA (Department of Veterans Affairs)	$333,694	0.1%	Rank history: #46 in FY2022, #30 in FY2023, #20 in FY2024 and #6 in FY2025; down 73 since FY2020.

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100 of 188 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 $266 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 2021 ran Oct 1, 2020 – Sep 30, 2021. 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 FY2020. "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 FY2020 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 FY2021?

1. Noresco LLC ($10.4M), 2. Apogee Consulting Group, P.a. ($9.65M), 3. GEO Bancroft Engineering LLC ($9.46M), 4. Triple C-The A & E Group LLC ($8.68M), 5. Valhalla Engineering Group, LLC ($8.56M), 6. Spur Design, LLC ($8.27M), 7. Acela Architects + Engineers PC ($7.89M), 8. Health Facilities Group LLC ($7.31M), 9. Spees-Hernandez JV LLC ($6.97M), 10. Guidon Design Inc. ($6.69M).

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