Top 100 Contractors in NAICS 2371: Utility System Construction, FY2021

Name: Top 100 Contractors in NAICS 2371: Utility System Construction, FY2021
Creator: GovTribe

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

The top 10 won 28% of FY2021 NAICS 2371 contract dollars

Contract obligations: $1,467,117,335 Net of deobligations, by contracts coded NAICS 2371 or a code under it
Contractors: 1,032 Parent companies with an obligation
Largest contractor: Garco Construction, Inc. $74.1 million, 4.8% 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	Garco Construction, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$74,071,044	4.8%	Rank history: not on the FY2022–FY2023 lists, #9 in FY2024 and not on the FY2025 list; up 352 since FY2020.
2	Camp Dresser & Mckee Inc. 3 awardees, including CDM Constructors Inc. Top agencies DOI (Department of the Interior) Army (Department of the Army) Navy (Department of the Navy)	$67,145,123	4.4%	Rank history: not on the FY2022–FY2025 lists; up 77 since FY2020.
3	Weston Solutions Holdings, Inc. 2 awardees, including Weston Solutions Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) Army (Department of the Army)	$46,509,473	3.0%	Rank history: #13 in FY2022, #34 in FY2023, #2 in FY2024 and #6 in FY2025; up 3 since FY2020.
4	Synergy Electric Company, Inc. Top agencies Navy (Department of the Navy)	$45,434,630	3.0%	Rank history: #30 in FY2022, #35 in FY2023, #8 in FY2024 and #54 in FY2025; up 46 since FY2020.
5	Wood Environment & Infrastructure Solutions Inc. 2 awardees, including WSP USA Environment & Infrastructure Inc. and C E C Controls Co, Inc. Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy) DHS (Department of Homeland Security)	$44,390,801	2.9%	Rank history: #20 in FY2022, #11 in FY2023 and not on the FY2024–FY2025 lists; up 26 since FY2020.
6	Reliable Contracting Group, LLC Top agencies DLA (Defense Logistics Agency)	$37,515,155	2.4%	Rank history: #16 in FY2022, #10 in FY2023, #20 in FY2024 and #8 in FY2025; up 20 since FY2020.
7	Aptim Federal Services LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$34,228,268	2.2%	Rank history: not on the FY2022 list, #4 in FY2023, #15 in FY2024 and not on the FY2025 list; down 4 since FY2020.
8	Winnebago Tribe of Nebraska Through HCI Management Services Company Top agencies DOS (Department of State)	$31,925,000	2.1%	Rank history: #33 in FY2022, #16 in FY2023, #87 in FY2024 and not on the FY2025 list; down 1 since FY2020.
9	Reliable Builders Inc. Top agencies Navy (Department of the Navy)	$26,681,412	1.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
10	Power Pro Plus Inc. Top agencies Navy (Department of the Navy)	$26,099,117	1.7%	Rank history: #88 in FY2022 and not on the FY2023–FY2025 lists; up 1 since FY2020.
11	Granite-Obayashi A Joint Venture Top agencies Navy (Department of the Navy)	$25,972,393	1.7%	Rank history: not on the FY2022 list, #65 in FY2023, #64 in FY2024 and not on the FY2025 list; down 9 since FY2020.
12	Southland Holdings LLC Through Oscar Renda Contracting Inc. Top agencies DOI (Department of the Interior)	$23,844,075	1.6%	Rank history: #37 in FY2022 and not on the FY2023–FY2025 lists; up 267 since FY2020.
13	The Walsh Group 2 awardees, including Archer Western Construction, LLC and Walsh Construction Company II, LLC Top agencies DOI (Department of the Interior) Army (Department of the Army)	$20,448,577	1.3%	Rank history: #4 in FY2022, #15 in FY2023 and not on the FY2024–FY2025 lists; up 6 since FY2020.
14	Bodell Construction Company Top agencies USAF (Department of the Air Force)	$20,338,800	1.3%	Rank history: not on the FY2022–FY2025 lists; up 351 since FY2020.
15	WHH Nisqually-Garco JV 2 Top agencies DLA (Defense Logistics Agency)	$20,124,000	1.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
16	Ross Group Construction Corporation, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$19,881,164	1.3%	Rank history: #55 in FY2022, not on the FY2023–FY2024 lists and #92 in FY2025; up 58 since FY2020.
17	Nova Group Inc. 2 awardees, including Service Electric Company Top agencies Army (Department of the Army) Navy (Department of the Navy) DOJ (Department of Justice)	$19,261,305	1.3%	Rank history: #7 in FY2022, #8 in FY2023, #81 in FY2024 and not on the FY2025 list; down 16 since FY2020.
18	City of Marion Top agencies DOI (Department of the Interior)	$16,405,188	1.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
19	CCI Facility Support Services LLC Top agencies Army (Department of the Army) DHS (Department of Homeland Security)	$16,248,114	1.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
20	Structural Associates Inc. Top agencies Army (Department of the Army) DLA (Defense Logistics Agency)	$15,924,884	1.0%	Rank history: #12 in FY2022, not on the FY2023 list, #86 in FY2024 and #65 in FY2025; up 25 since FY2020.
21	Red Point Construction, LLC Top agencies Army (Department of the Army)	$15,798,884	1.0%	Rank history: not on the FY2022–FY2023 lists, #99 in FY2024 and #56 in FY2025; new, not ranked in FY2020.
22	SAK Construction LLC Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico) Army (Department of the Army)	$15,556,857	1.0%	Rank history: #23 in FY2022, not on the FY2023 list, #67 in FY2024 and not on the FY2025 list; up 70 since FY2020.
23	Helix Electric, Inc. Top agencies Navy (Department of the Navy)	$14,799,990	1.0%	Rank history: not on the FY2022–FY2025 lists; up 121 since FY2020.
24	Four Tribes Enterprises, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$13,615,340	0.9%	Rank history: not on the FY2022 list, #84 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2020.
25	CCI Utility and Construction Services LLC Top agencies Army (Department of the Army)	$13,206,194	0.9%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
26	BB Government Services GMBH Through Porr Government Services Benelux Top agencies Army (Department of the Army)	$12,898,721	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
27	LGC Global, Inc. Top agencies Army (Department of the Army)	$12,847,586	0.8%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
28	Pond Constructors Inc. Top agencies Navy (Department of the Navy)	$12,257,350	0.8%	Rank history: #39 in FY2022, not on the FY2023–FY2024 lists and #76 in FY2025; up 112 since FY2020.
29	Cape-Burns & Mcdonnell JV Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$11,980,075	0.8%	Rank history: #46 in FY2022, #28 in FY2023 and not on the FY2024–FY2025 lists; down 17 since FY2020.
30	Kajima Corporation 2 awardees, including Hawaiian Dredging Construction Company, Inc. and Icon Si (Aust) PTY Ltd Top agencies Navy (Department of the Navy)	$11,925,353	0.8%	Rank history: not on the FY2022 list, #41 in FY2023 and not on the FY2024–FY2025 lists; up 108 since FY2020.
31	Osborne Construction Co Top agencies Army (Department of the Army)	$11,891,300	0.8%	Rank history: not on the FY2022 list, #82 in FY2023 and not on the FY2024–FY2025 lists; up 87 since FY2020.
32	Dawson Enterprises, Inc. Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$11,880,026	0.8%	Rank history: #17 in FY2022, #25 in FY2023, #39 in FY2024 and #13 in FY2025; up 120 since FY2020.
33	Bristol Bay Native Corporation Through Bristol Engineering Services Company, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$11,415,103	0.7%	Rank history: not on the FY2022 list, #7 in FY2023, #13 in FY2024 and #33 in FY2025; down 17 since FY2020.
34	Nana Regional Corporation Inc Through Jade Creek Construction LLC Top agencies USAF (Department of the Air Force)	$11,307,381	0.7%	Rank history: #42 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
35	Tempest Enterprises Inc. Top agencies Army (Department of the Army)	$10,973,698	0.7%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
36	Yellowstone Electric Co Top agencies DOI (Department of the Interior)	$10,919,489	0.7%	Rank history: not on the FY2022–FY2025 lists; up 277 since FY2020.
37	Koontz Electric Company, Incorporated Top agencies Army (Department of the Army) DOE (Department of Energy)	$10,447,968	0.7%	Rank history: #83 in FY2022, #32 in FY2023, #78 in FY2024 and not on the FY2025 list; up 2 since FY2020.
38	Kinley Construction Company Top agencies DLA (Defense Logistics Agency)	$10,426,868	0.7%	Rank history: not on the FY2022–FY2025 lists; up 11 since FY2020.
39	Teksol Integration Group Inc. Top agencies Army (Department of the Army)	$9,875,294	0.6%	Rank history: not on the FY2022–FY2023 lists, #49 in FY2024 and not on the FY2025 list; new, not ranked in FY2020.
40	Sitemaster Inc. Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$9,299,180	0.6%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; unchanged since FY2020.
41	Goshawk, LLC Top agencies DLA (Defense Logistics Agency) USAF (Department of the Air Force)	$9,286,785	0.6%	Rank history: #24 in FY2022, #24 in FY2023, #19 in FY2024 and #62 in FY2025; down 13 since FY2020.
42	Andritz AG Through Andritz Hydro Corp Top agencies Army (Department of the Army)	$9,207,080	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
43	Metawater Co., Ltd. Through Wigen Companies, Inc. Top agencies Navy (Department of the Navy)	$8,957,711	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
44	PG&E Corporation Through Pacific Gas and Electric Company Top agencies DOI (Department of the Interior)	$8,927,052	0.6%	Rank history: not on the FY2022–FY2025 lists; up 207 since FY2020.
45	Gardner Zemke Co Top agencies DOI (Department of the Interior)	$8,878,531	0.6%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
46	Galindo Electric, Inc. Top agencies Navy (Department of the Navy)	$8,796,735	0.6%	Rank history: #45 in FY2022 and not on the FY2023–FY2025 lists; up 15 since FY2020.
47	Puyenpa Services, LLC Top agencies Navy (Department of the Navy)	$8,548,377	0.6%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
48	Grimmer Construction Inc. Top agencies Army (Department of the Army)	$7,873,737	0.5%	Rank history: #89 in FY2022, #58 in FY2023, #97 in FY2024 and not on the FY2025 list; up 33 since FY2020.
49	All State Construction Inc. Top agencies DOJ (Department of Justice) VA (Department of Veterans Affairs)	$7,741,000	0.5%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
50	Kear Civil Corp Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$7,552,014	0.5%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
51	KWR Construction Inc. Top agencies Army (Department of the Army)	$7,377,915	0.5%	Rank history: #44 in FY2022, not on the FY2023 list, #83 in FY2024 and not on the FY2025 list; up 251 since FY2020.
52	Bairco Construction Inc. Top agencies DOI (Department of the Interior)	$7,372,673	0.5%	Rank history: not on the FY2022 list, #83 in FY2023, #62 in FY2024 and not on the FY2025 list; up 4 since FY2020.
53	Hampton Roads Mechanical of Virginia, LLC Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency)	$7,199,280	0.5%	Rank history: #43 in FY2022, not on the FY2023 list, #27 in FY2024 and #23 in FY2025; down 24 since FY2020.
54	Weston Solutions Inc. Top agencies Navy (Department of the Navy)	$6,751,058	0.4%	Rank history: not on the FY2022–FY2025 lists; up 370 since FY2020.
55	Eklutna Construction & Maintenance, LLC Top agencies Army (Department of the Army)	$6,467,361	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
56	American Contracting & Environmental Services, Incorporated Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$6,431,446	0.4%	Rank history: not on the FY2022–FY2025 lists; up 74 since FY2020.
57	Souza Construction, Inc. Top agencies Navy (Department of the Navy)	$6,282,000	0.4%	Rank history: #94 in FY2022, #33 in FY2023, #26 in FY2024 and not on the FY2025 list; up 7 since FY2020.
58	Tri-Technic Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$6,118,558	0.4%	Rank history: not on the FY2022 list, #50 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
59	CCI Facility Contractors, LLC 2 awardees Top agencies Navy (Department of the Navy) Army (Department of the Army)	$6,056,879	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
60	Bath Group, LLC Top agencies Army (Department of the Army)	$6,027,936	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
61	Dvorak, LLC Top agencies NASA (National Aeronautics and Space Administration)	$5,957,000	0.4%	Rank history: not on the FY2022 list, #95 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
62	Aptim-North Wind Construction JV LLC Top agencies DOE (Department of Energy)	$5,933,500	0.4%	Rank history: #52 in FY2022, #21 in FY2023 and not on the FY2024–FY2025 lists; down 53 since FY2020.
63	Ahtna, Incorporated 2 awardees, including Ahtna Global LLC and Ahtna Environmental, Inc. Top agencies Army (Department of the Army) DOT (Department of Transportation)	$5,815,014	0.4%	Rank history: not on the FY2022–FY2025 lists; down 17 since FY2020.
64	Aqua Engineers Inc. Top agencies Army (Department of the Army)	$5,810,658	0.4%	Rank history: not on the FY2022–FY2025 lists; down 41 since FY2020.
65	Krima Construction Corp. Top agencies Army (Department of the Army)	$5,728,377	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
66	MC2 Engineering and Construction, P.C. Top agencies DOI (Department of the Interior)	$5,452,864	0.4%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
67	Ukpeagvik Inupiat Corpor Through Rockford Corporation Top agencies DLA (Defense Logistics Agency) Army (Department of the Army)	$5,305,267	0.3%	Rank history: not on the FY2022–FY2025 lists; up 82 since FY2020.
68	JMG Constructors LLC Top agencies DOI (Department of the Interior)	$5,257,071	0.3%	Rank history: #76 in FY2022, #46 in FY2023 and not on the FY2024–FY2025 lists; up 22 since FY2020.
69	RBV Contracting Inc. Top agencies USAF (Department of the Air Force)	$5,029,800	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
70	Frawner Corporation Top agencies Navy (Department of the Navy)	$5,002,680	0.3%	Rank history: #59 in FY2022, not on the FY2023 list, #35 in FY2024 and #85 in FY2025; up 85 since FY2020.
71	Civil Works Contracting LLC Top agencies Army (Department of the Army)	$4,989,211	0.3%	Rank history: not on the FY2022–FY2025 lists; down 17 since FY2020.
72	Orcom, A Division of Ortega Companies, Inc. Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior)	$4,962,203	0.3%	Rank history: not on the FY2022–FY2025 lists; up 310 since FY2020.
73	Prime One Group General Trading and Contracting Company WLL Top agencies USAF (Department of the Air Force)	$4,912,655	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
74	Brice Engineering, LLC Top agencies USAF (Department of the Air Force)	$4,903,346	0.3%	Rank history: #75 in FY2022, not on the FY2023 list, #91 in FY2024 and not on the FY2025 list; down 12 since FY2020.
75	White Bear Construction, Inc. Top agencies DOI (Department of the Interior)	$4,776,160	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
76	Aaecon General Contracting LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOJ (Department of Justice)	$4,730,127	0.3%	Rank history: not on the FY2022–FY2024 lists and #47 in FY2025; up 214 since FY2020.
77	Central Environmental Inc. Top agencies Navy (Department of the Navy)	$4,705,898	0.3%	Rank history: #40 in FY2022, #97 in FY2023, #53 in FY2024 and not on the FY2025 list; down 50 since FY2020.
78	Interstate Electrical Contractors, Inc. Top agencies Army (Department of the Army)	$4,529,000	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
79	Agbw Corp Top agencies Navy (Department of the Navy)	$4,362,890	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
80	Snodgrass Contracting LLC Top agencies USAF (Department of the Air Force)	$4,328,334	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
81	Swan Contracting LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$4,155,015	0.3%	Rank history: not on the FY2022–FY2025 lists; up 291 since FY2020.
82	Native Hawaiian Community Development Corporation 2 awardees, including GSI Pacific Inc. and GSI North America Inc. Top agencies DLA (Defense Logistics Agency)	$4,149,654	0.3%	Rank history: not on the FY2022 list, #99 in FY2023 and not on the FY2024–FY2025 lists; down 22 since FY2020.
83	D Square Construction LLC Top agencies Army (Department of the Army) VA (Department of Veterans Affairs)	$4,057,680	0.3%	Rank history: not on the FY2022–FY2025 lists; up 402 since FY2020.
84	CPP Construction Co Top agencies Army (Department of the Army)	$3,977,544	0.3%	Rank history: not on the FY2022–FY2025 lists; up 78 since FY2020.
85	Nor-Cal Pump & Well Drilling, Inc. Top agencies Army (Department of the Army)	$3,957,130	0.3%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
86	Reyes Construction, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$3,866,002	0.3%	Rank history: not on the FY2022–FY2024 lists and #27 in FY2025; up 237 since FY2020.
87	Tanadgusix Corporation Through TDX Power Services LLC Top agencies Army (Department of the Army)	$3,853,209	0.3%	Rank history: not on the FY2022–FY2025 lists; up 110 since FY2020.
88	Forus Contracting, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$3,791,986	0.2%	Rank history: #77 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
89	Transtar Pipeline and Orion Construction JV Top agencies Navy (Department of the Navy)	$3,714,778	0.2%	Rank history: #86 in FY2022, #39 in FY2023 and not on the FY2024–FY2025 lists; down 57 since FY2020.
90	A. West Enterprise, LLC Top agencies NASA (National Aeronautics and Space Administration)	$3,689,639	0.2%	Rank history: not on the FY2022 list, #42 in FY2023, not on the FY2024 list and #53 in FY2025; down 7 since FY2020.
91	Rausch Infrastructure LLC Top agencies Army (Department of the Army)	$3,687,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
92	Coventina-Gse JV, LLC Top agencies DOI (Department of the Interior) VA (Department of Veterans Affairs)	$3,671,161	0.2%	Rank history: #47 in FY2022 and not on the FY2023–FY2025 lists; up 51 since FY2020.
93	Unit-Asrc Construction, LLC Top agencies Army (Department of the Army)	$3,630,924	0.2%	Rank history: #92 in FY2022 and not on the FY2023–FY2025 lists; up 116 since FY2020.
94	Colombara SRL Top agencies Army (Department of the Army)	$3,623,302	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
95	Afci-Cci JV One LLC Top agencies VA (Department of Veterans Affairs)	$3,593,000	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
96	Native American Services Corp. Top agencies USAF (Department of the Air Force)	$3,572,700	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
97	Sygnos Inc. Top agencies Navy (Department of the Navy)	$3,529,312	0.2%	Rank history: #56 in FY2022, #69 in FY2023, #75 in FY2024 and #72 in FY2025; down 8 since FY2020.
98	Paramount Construction Group, LLC Top agencies VA (Department of Veterans Affairs)	$3,359,704	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
99	D7, LLC Top agencies DLA (Defense Logistics Agency)	$3,350,300	0.2%	Rank history: #57 in FY2022, #40 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
100	Delta Well & Pump Co., Inc. Top agencies DOI (Department of the Interior)	$3,285,000	0.2%	Rank history: not on the FY2022–FY2025 lists; up 164 since FY2020.

Show 75 more

100 of 1,032 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 2371

Code	Net obligations	Largest contractor
23711 Water and Sewer Line and Related Structures Construction	$534,863,156	Camp Dresser & Mckee Inc.
23712 Oil and Gas Pipeline and Related Structures Construction	$485,473,367	Garco Construction, Inc.
23713 Power and Communication Line and Related Structures Construction	$446,780,812	Synergy Electric Company, Inc.

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 $1.53 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 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 NAICS 2371 contractors in FY2021?

1. Garco Construction, Inc. ($74.1M), 2. Camp Dresser & Mckee Inc. ($67.1M), 3. Weston Solutions Holdings, Inc. ($46.5M), 4. Synergy Electric Company, Inc. ($45.4M), 5. Wood Environment & Infrastructure Solutions Inc. ($44.4M), 6. Reliable Contracting Group, LLC ($37.5M), 7. Aptim Federal Services LLC ($34.2M), 8. Winnebago Tribe of Nebraska ($31.9M), 9. Reliable Builders Inc. ($26.7M), 10. Power Pro Plus Inc. ($26.1M).

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