Top 100 Contractors in PSC F0: Natural Resource Conservation Services, FY2024

Name: Top 100 Contractors in PSC F0: Natural Resource Conservation Services, FY2024
Creator: GovTribe

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

The top 10 won 18% of FY2024 PSC F0 contract dollars

Contract obligations: $2,592,030,189 Net of deobligations, by contracts coded PSC F0 or a code under it
Contractors: 3,496 Parent companies with an obligation
Largest contractor: Sierra Tahoe Environmental Management, LLC $89.4 million, 3.3% 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	Sierra Tahoe Environmental Management, LLC Top agencies USDA (Department of Agriculture)	$89,416,002	3.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
2	Helicopter Express LLC Top agencies USDA (Department of Agriculture)	$78,569,360	2.9%	Rank history: #46 in FY2021, #6 in FY2022, #12 in FY2023 and #2 in FY2025; up 10 since FY2023.
3	Brice Civil Constructors Inc. Top agencies Army (Department of the Army)	$60,085,560	2.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
4	10 Tanker Air Carrier LLC Top agencies USDA (Department of Agriculture)	$47,486,955	1.7%	Rank history: not on the FY2021–FY2023 lists and #3 in FY2025; new.
5	Coulson Aviation (Usa), Inc. Top agencies USDA (Department of Agriculture)	$41,350,832	1.5%	Rank history: not on the FY2021 list, #17 in FY2022, #20 in FY2023 and #7 in FY2025; up 15 since FY2023.
6	Aero Air, LLC Top agencies USDA (Department of Agriculture)	$40,369,194	1.5%	Rank history: #41 in FY2021, not on the FY2022 list, #28 in FY2023 and #6 in FY2025; up 22 since FY2023.
7	Brink Brothers Inc. Top agencies USDA (Department of Agriculture)	$35,084,033	1.3%	Rank history: not on the FY2021–FY2022 lists, #29 in FY2023 and #23 in FY2025; up 22 since FY2023.
8	Neptune Aviation Services, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$34,401,470	1.3%	Rank history: #14 in FY2021, #11 in FY2022, #17 in FY2023 and #9 in FY2025; up 9 since FY2023.
9	Aero-Flite, Inc. Top agencies USDA (Department of Agriculture)	$32,187,053	1.2%	Rank history: #26 in FY2021, not on the FY2022 list, #32 in FY2023 and #13 in FY2025; up 23 since FY2023.
10	Croman Corp Top agencies USDA (Department of Agriculture)	$29,182,861	1.1%	Rank history: not on the FY2021–FY2023 lists and #12 in FY2025; new.
11	Billings Flying Service LLC Top agencies USDA (Department of Agriculture)	$26,998,865	1.0%	Rank history: not on the FY2021 list, #4 in FY2022, #5 in FY2023 and #8 in FY2025; down 6 since FY2023.
12	Precision, LLC Top agencies USDA (Department of Agriculture)	$25,422,640	0.9%	Rank history: not on the FY2021 list, #37 in FY2022, #80 in FY2023 and #10 in FY2025; up 68 since FY2023.
13	Rotak LLC Top agencies USDA (Department of Agriculture)	$25,231,828	0.9%	Rank history: not on the FY2021 list, #63 in FY2022, #18 in FY2023 and #5 in FY2025; up 5 since FY2023.
14	Helicopter Transport Services, LLC Top agencies USDA (Department of Agriculture)	$22,796,393	0.8%	Rank history: not on the FY2021 list, #1 in FY2022, #10 in FY2023 and #1 in FY2025; down 4 since FY2023.
15	Siller Helicopters, LLC Top agencies USDA (Department of Agriculture)	$21,765,498	0.8%	Rank history: not on the FY2021 list, #8 in FY2022, #8 in FY2023 and #4 in FY2025; down 7 since FY2023.
16	Helimax Aviation LLC Top agencies USDA (Department of Agriculture)	$19,800,623	0.7%	Rank history: not on the FY2021–FY2023 lists and #17 in FY2025; new.
17	Patrick Environmental Inc. Top agencies USDA (Department of Agriculture)	$16,307,152	0.6%	Rank history: not on the FY2021 list, #31 in FY2022, #22 in FY2023 and #16 in FY2025; up 5 since FY2023.
18	Grayback Forestry Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$15,857,470	0.6%	Rank history: not on the FY2021–FY2023 lists and #15 in FY2025; new.
19	Leisnoi Diversified Services, LLC Top agencies EPA (Environmental Protection Agency)	$15,072,269	0.6%	Rank history: #18 in FY2021, #24 in FY2022, #38 in FY2023 and #61 in FY2025; up 19 since FY2023.
20	Firestorm Wildland Fire Suppression, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$15,020,605	0.5%	Rank history: not on the FY2021 list, #16 in FY2022, #24 in FY2023 and #19 in FY2025; up 4 since FY2023.
21	Pacific OASIS Inc Top agencies USDA (Department of Agriculture)	$14,959,568	0.5%	Rank history: not on the FY2021–FY2022 lists, #34 in FY2023 and #24 in FY2025; up 13 since FY2023.
22	P.j. Helicopters, Inc. Top agencies USDA (Department of Agriculture)	$14,901,839	0.5%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2025; new.
23	Spur Aviation Services, LC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$14,239,856	0.5%	Rank history: not on the FY2021 list, #55 in FY2022, #64 in FY2023 and #29 in FY2025; up 41 since FY2023.
24	Western Pilot Service Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$14,094,805	0.5%	Rank history: not on the FY2021–FY2023 lists and #22 in FY2025; new.
25	Imperial Forestry, Incorporated Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$13,934,411	0.5%	Rank history: #17 in FY2021, #20 in FY2022, #15 in FY2023 and #40 in FY2025; down 10 since FY2023.
26	Capitol Helicopters, Inc. Top agencies USDA (Department of Agriculture)	$13,869,775	0.5%	Rank history: not on the FY2021 list, #48 in FY2022, #45 in FY2023 and #14 in FY2025; up 19 since FY2023.
27	Ponderosa Aviation Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$13,501,886	0.5%	Rank history: not on the FY2021 list, #42 in FY2022, #46 in FY2023 and #54 in FY2025; up 19 since FY2023.
28	North Pacific Forestry Inc. Top agencies USDA (Department of Agriculture)	$13,109,832	0.5%	Rank history: not on the FY2021–FY2022 lists, #58 in FY2023 and #51 in FY2025; up 30 since FY2023.
29	A.i.s., Inc. Top agencies Commerce (Department of Commerce)	$12,922,370	0.5%	Rank history: #30 in FY2021, #47 in FY2022, #71 in FY2023 and #39 in FY2025; up 42 since FY2023.
30	G E Forestry, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$12,888,960	0.5%	Rank history: #20 in FY2021, #19 in FY2022, #25 in FY2023 and not on the FY2025 list; down 5 since FY2023.
31	Ponderosa Timberland, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$12,201,587	0.4%	Rank history: not on the FY2021 list, #45 in FY2022, #47 in FY2023 and not on the FY2025 list; up 16 since FY2023.
32	Omalley Brothers Corp Top agencies USDA (Department of Agriculture)	$11,972,398	0.4%	Rank history: #83 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
33	Heli-1 Corp Top agencies USDA (Department of Agriculture)	$11,942,140	0.4%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2025; new.
34	Aero Spray Inc. Top agencies DOI (Department of the Interior)	$11,798,726	0.4%	Rank history: #10 in FY2021, not on the FY2022–FY2023 lists and #45 in FY2025; returned.
35	Trans Aero LLC Top agencies USDA (Department of Agriculture)	$11,470,476	0.4%	Rank history: not on the FY2021 list, #59 in FY2022, #59 in FY2023 and #47 in FY2025; up 24 since FY2023.
36	Tetra Tech, Inc. 2 awardees, including Ard, Inc. Top agencies USAID (US Agency for International Development) USDA (Department of Agriculture)	$11,219,528	0.4%	Rank history: #19 in FY2021, #30 in FY2022, #21 in FY2023 and not on the FY2025 list; down 15 since FY2023.
37	Asrc Consulting & Environmental Services LLC Top agencies DOE (Department of Energy) DOI (Department of the Interior)	$10,897,996	0.4%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 71 since FY2023.
38	Co Fire Aviation, Inc. Top agencies DOI (Department of the Interior)	$10,750,332	0.4%	Rank history: not on the FY2021–FY2023 lists and #21 in FY2025; new.
39	Hillsboro Aviation Inc. Top agencies USDA (Department of Agriculture)	$10,744,837	0.4%	Rank history: not on the FY2021–FY2023 lists and #38 in FY2025; new.
40	Brainerd Helicopters, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$10,711,298	0.4%	Rank history: not on the FY2021 list, #33 in FY2022, #43 in FY2023 and #58 in FY2025; up 3 since FY2023.
41	Timberline Helicopters Inc. Top agencies USDA (Department of Agriculture)	$10,659,357	0.4%	Rank history: not on the FY2021 list, #40 in FY2022, #68 in FY2023 and #52 in FY2025; up 27 since FY2023.
42	Big Sky Mobile Catering Corp Top agencies USDA (Department of Agriculture)	$10,392,861	0.4%	Rank history: #8 in FY2021, #38 in FY2022, #54 in FY2023 and #27 in FY2025; up 12 since FY2023.
43	Bluesky Helicopters Inc. Top agencies USDA (Department of Agriculture)	$10,371,176	0.4%	Rank history: not on the FY2021 list, #39 in FY2022, #39 in FY2023 and #36 in FY2025; down 4 since FY2023.
44	Air Resources Helicopters, Inc. Top agencies USDA (Department of Agriculture)	$10,142,530	0.4%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2025; up 87 since FY2023.
45	State of Oregon Department of Fish and Wildlife Top agencies Army (Department of the Army)	$9,738,446	0.4%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2025; new.
46	Summitt Forests, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$9,733,335	0.4%	Rank history: #23 in FY2021, #15 in FY2022, #6 in FY2023 and #60 in FY2025; down 40 since FY2023.
47	Thunder MTN Catering Inc. Top agencies USDA (Department of Agriculture)	$9,684,988	0.4%	Rank history: #15 in FY2021, #18 in FY2022, #69 in FY2023 and #28 in FY2025; up 22 since FY2023.
48	New Frontier Aviation, LLC Top agencies DOI (Department of the Interior)	$9,528,898	0.3%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2025; new.
49	Zimmetal and Welding, LLC Top agencies DOI (Department of the Interior)	$9,513,215	0.3%	Rank history: not on the FY2021–FY2022 lists, #94 in FY2023 and not on the FY2025 list; up 45 since FY2023.
50	Miller Timber Services, Inc. Top agencies USDA (Department of Agriculture)	$9,326,468	0.3%	Rank history: #47 in FY2021, #23 in FY2022, #48 in FY2023 and #25 in FY2025; down 2 since FY2023.
51	Orbic Air, LLC Top agencies USDA (Department of Agriculture)	$8,720,769	0.3%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2025; up 112 since FY2023.
52	Torres Contracting, Inc. Top agencies USDA (Department of Agriculture)	$8,720,499	0.3%	Rank history: not on the FY2021 list, #81 in FY2022, not on the FY2023 list and #57 in FY2025; up 93 since FY2023.
53	Cutting Edge Forestry, Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$8,403,952	0.3%	Rank history: #25 in FY2021, #27 in FY2022, #42 in FY2023 and not on the FY2025 list; down 11 since FY2023.
54	West Coast Reforestation Inc. Top agencies USDA (Department of Agriculture)	$8,399,513	0.3%	Rank history: not on the FY2021 list, #83 in FY2022, not on the FY2023 list and #35 in FY2025; returned.
55	Heliqwest International Inc. Top agencies USDA (Department of Agriculture)	$8,346,546	0.3%	Rank history: #69 in FY2021, #25 in FY2022, not on the FY2023 list and #55 in FY2025; up 105 since FY2023.
56	Bighorn Airways Inc. Top agencies USDA (Department of Agriculture)	$8,343,736	0.3%	Rank history: not on the FY2021 list, #53 in FY2022, #78 in FY2023 and #20 in FY2025; up 22 since FY2023.
57	Alta Pacific Fire Fighting, LLC Top agencies USDA (Department of Agriculture)	$8,266,873	0.3%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and #49 in FY2025; up 36 since FY2023.
58	C.t.l. Forest Management, Inc. Top agencies USDA (Department of Agriculture) Army (Department of the Army)	$8,072,784	0.3%	Rank history: #73 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
59	Houston's Too LC Top agencies USDA (Department of Agriculture)	$8,007,759	0.3%	Rank history: #7 in FY2021, #70 in FY2022, #70 in FY2023 and #31 in FY2025; up 11 since FY2023.
60	J3 Contracting, Inc. Top agencies USDA (Department of Agriculture)	$7,778,623	0.3%	Rank history: #48 in FY2021, #62 in FY2022, not on the FY2023 list and #86 in FY2025; up 47 since FY2023.
61	TWC Corp Top agencies USDA (Department of Agriculture)	$7,690,400	0.3%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2023 and not on the FY2025 list; down 21 since FY2023.
62	Douthit Logging Inc. Top agencies USDA (Department of Agriculture)	$7,634,441	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
63	C.c. Calzone, LLC Top agencies USDA (Department of Agriculture)	$7,610,108	0.3%	Rank history: not on the FY2021–FY2023 lists and #37 in FY2025; new.
64	OC Forestry Inc Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$7,560,520	0.3%	Rank history: not on the FY2021–FY2022 lists, #53 in FY2023 and not on the FY2025 list; down 11 since FY2023.
65	CDM Federal Programs Corporation Top agencies EPA (Environmental Protection Agency)	$7,518,178	0.3%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
66	Alpine Services LLC Top agencies USDA (Department of Agriculture)	$7,324,621	0.3%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and #30 in FY2025; up 24 since FY2023.
67	Dynamic Aviation Group, Inc. Top agencies USDA (Department of Agriculture)	$7,140,512	0.3%	Rank history: #35 in FY2021, #34 in FY2022, #67 in FY2023 and #34 in FY2025; unchanged since FY2023.
68	Apex Enterprises, Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$7,066,716	0.3%	Rank history: not on the FY2021–FY2022 lists, #56 in FY2023 and not on the FY2025 list; down 12 since FY2023.
69	Aerial Timber Applicators Inc. Top agencies DOI (Department of the Interior)	$7,065,185	0.3%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2025; new.
70	P.r. Reforestation, Inc. Top agencies USDA (Department of Agriculture)	$6,930,707	0.3%	Rank history: not on the FY2021–FY2023 lists and #59 in FY2025; up 115 since FY2023.
71	Forest Fitness LLC Top agencies USDA (Department of Agriculture)	$6,771,475	0.2%	Rank history: not on the FY2021–FY2023 lists and #75 in FY2025; new.
72	Mountain Blade Runner LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$6,730,604	0.2%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2025; up 37 since FY2023.
73	Central Copters, Inc. Top agencies USDA (Department of Agriculture)	$6,701,450	0.2%	Rank history: not on the FY2021 list, #57 in FY2022, #79 in FY2023 and #56 in FY2025; up 6 since FY2023.
74	JS Livestock Inc. Top agencies DOI (Department of the Interior)	$6,696,420	0.2%	Rank history: not on the FY2021–FY2023 lists and #95 in FY2025; up 76 since FY2023.
75	Henrys Aerial Service Inc. Top agencies DOI (Department of the Interior)	$6,675,246	0.2%	Rank history: not on the FY2021–FY2023 lists and #33 in FY2025; up 40 since FY2023.
76	Idaho Helicopters Inc. Top agencies USDA (Department of Agriculture)	$6,432,304	0.2%	Rank history: not on the FY2021 list, #78 in FY2022, #91 in FY2023 and #77 in FY2025; up 15 since FY2023.
77	DJM Ecological Services, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$6,400,067	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 185 since FY2023.
78	Evergreen Flying Service Inc. Top agencies DOI (Department of the Interior)	$6,395,570	0.2%	Rank history: not on the FY2021–FY2023 lists and #89 in FY2025; new.
79	Lava River Forestry Inc. Top agencies USDA (Department of Agriculture)	$6,378,682	0.2%	Rank history: not on the FY2021 list, #76 in FY2022, not on the FY2023 list and not on the FY2025 list; up 119 since FY2023.
80	Sierra Valley Enterprises LLC Top agencies USDA (Department of Agriculture)	$6,269,539	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
81	Minuteman Aviation Inc. Top agencies USDA (Department of Agriculture)	$6,233,977	0.2%	Rank history: not on the FY2021 list, #50 in FY2022, #82 in FY2023 and #63 in FY2025; up 1 since FY2023.
82	MP Forestry Incorporated Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$6,208,018	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
83	Pacific States Marine Fisheries Commission Top agencies Commerce (Department of Commerce) DOI (Department of the Interior)	$6,089,327	0.2%	Rank history: not on the FY2021 list, #71 in FY2022, not on the FY2023 list and #76 in FY2025; returned.
84	Columbia Helicopters, Inc. Top agencies USDA (Department of Agriculture)	$6,078,551	0.2%	Rank history: not on the FY2021 list, #10 in FY2022, not on the FY2023 list and not on the FY2025 list; up 33 since FY2023.
85	Markit! Forestry Management LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$6,073,597	0.2%	Rank history: not on the FY2021–FY2022 lists, #16 in FY2023 and not on the FY2025 list; down 69 since FY2023.
86	Chiricahua Procurement LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$6,036,526	0.2%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023 and not on the FY2025 list; up 1 since FY2023.
87	Sprout Forestry Incorporated Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,905,337	0.2%	Rank history: not on the FY2021 list, #94 in FY2022, #73 in FY2023 and #79 in FY2025; down 14 since FY2023.
88	Kit Helicopter Operations LLC Top agencies USDA (Department of Agriculture)	$5,851,764	0.2%	Rank history: not on the FY2021–FY2022 lists, #98 in FY2023 and #42 in FY2025; up 10 since FY2023.
89	Technical and Engineering Support Alliance, LLC Top agencies Commerce (Department of Commerce)	$5,796,043	0.2%	Rank history: #36 in FY2021, not on the FY2022 list, #57 in FY2023 and not on the FY2025 list; down 32 since FY2023.
90	Franco Reforestation Inc. Top agencies USDA (Department of Agriculture)	$5,751,648	0.2%	Rank history: #44 in FY2021, #52 in FY2022, #41 in FY2023 and #67 in FY2025; down 49 since FY2023.
91	Bode Aviation, Inc. Top agencies USDA (Department of Agriculture)	$5,739,230	0.2%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2025; up 152 since FY2023.
92	Blue Mountain Contracting, Inc. Top agencies USDA (Department of Agriculture)	$5,734,553	0.2%	Rank history: not on the FY2021 list, #66 in FY2022, #96 in FY2023 and not on the FY2025 list; up 4 since FY2023.
93	Bishop Services Inc Top agencies USDA (Department of Agriculture)	$5,556,418	0.2%	Rank history: not on the FY2021–FY2023 lists and #90 in FY2025; up 21 since FY2023.
94	Despain, Kerry, M Top agencies DOI (Department of the Interior)	$5,546,759	0.2%	Rank history: #74 in FY2021, not on the FY2022–FY2023 lists and #78 in FY2025; up 10 since FY2023.
95	Silhouette Farm & Forestry, LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$5,505,782	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 58 since FY2023.
96	M.a.r. Contracting, LLC Top agencies USDA (Department of Agriculture)	$5,441,620	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 185 since FY2023.
97	Stewart's Firefighter Food Catering, Inc. Top agencies USDA (Department of Agriculture)	$5,419,757	0.2%	Rank history: #33 in FY2021, #97 in FY2022, #61 in FY2023 and not on the FY2025 list; down 36 since FY2023.
98	Atlantic States Marine Fisheries Commission Top agencies Commerce (Department of Commerce)	$5,286,429	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 5 since FY2023.
99	Mountain West Helicopters, LLC Top agencies USDA (Department of Agriculture)	$5,220,193	0.2%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2025; up 59 since FY2023.
100	R & R Contracting Inc. Top agencies USDA (Department of Agriculture)	$5,216,400	0.2%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2023 and #62 in FY2025; unchanged since FY2023.

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100 of 3,496 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC F0

Code	Net obligations	Largest contractor
F003 Forest/Range Fire Suppression/Presuppression Services	$1,727,843,615	Helicopter Express LLC
F099 Other Natural Resources and Conservation Services	$361,225,471	Sierra Tahoe Environmental Management, LLC
F006 Land Treatment Practices Services (plowing/clearing, etc.)	$104,946,756	Brice Civil Constructors Inc.
F014 Tree Thinning Services	$78,653,543	G E Forestry, Inc.
F020 Fisheries Resources Management Services	$74,336,541	A.i.s., Inc.
F016 Wildhorse/Burro Control Services	$67,970,033	Zimmetal and Welding, LLC
F018 Other Range/Forest Improvements Services (non-construction)	$41,670,786	Ponderosa Timberland, Inc.
F021 Site Preparation	$32,181,033	Leisnoi Diversified Services, LLC
F004 Forest/Range Fire Rehabilitation Services (non-construction)	$14,239,302	Apex Enterprises, Inc.
F005 Forest Tree Planting Services	$13,046,024	Mar-Len Environmental, Inc.
F015 Well Drilling/Exploratory Services	$12,765,263	Asrc Consulting & Environmental Services LLC
F001 Aerial Fertilization/Spraying Services	$12,575,458	Dynamic Aviation Group, Inc.
F019 Other Wildlife Management Services	$12,061,531	The Blackledge Group, Inc.
F009 Seed Collection/Production Services	$7,302,990	Ecopoint Inc.
F008 Recreation Site Maintenance Services (non-construction)	$3,746,965	Paragon-Jacobs Joint Venture, LLC

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $2.74 billion obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2024 ran Oct 1, 2023 – Sep 30, 2024. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2023. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2023 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 PSC F0 contractors in FY2024?

1. Sierra Tahoe Environmental Management, LLC ($89.4M), 2. Helicopter Express LLC ($78.6M), 3. Brice Civil Constructors Inc. ($60.1M), 4. 10 Tanker Air Carrier LLC ($47.5M), 5. Coulson Aviation (Usa), Inc. ($41.4M), 6. Aero Air, LLC ($40.4M), 7. Brink Brothers Inc. ($35.1M), 8. Neptune Aviation Services, Inc. ($34.4M), 9. Aero-Flite, Inc. ($32.2M), 10. Croman Corp ($29.2M).

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