Top 100 Contractors in PSC AH: Natural Resources and Environment R&D Services, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	RTX Corporation Through Raytheon Company Top agencies NASA (National Aeronautics and Space Administration)	$87,800,000	55.9%	Rank history: not on the FY2021–FY2023 lists and #1 in FY2024; unchanged since FY2024.
2	University Corporation for Atmospheric Research Top agencies Commerce (Department of Commerce) NASA (National Aeronautics and Space Administration)	$12,649,464	8.1%	Rank history: #98 in FY2021, #6 in FY2022, #16 in FY2023 and #3 in FY2024; up 1 since FY2024.
3	Credere Associates, LLC Top agencies Army (Department of the Army)	$3,795,529	2.4%	Rank history: #21 in FY2021, #26 in FY2022, #6 in FY2023 and #22 in FY2024; up 19 since FY2024.
4	University of Wisconsin System Top agencies NASA (National Aeronautics and Space Administration)	$3,200,000	2.0%	Rank history: not on the FY2021–FY2024 lists; new.
5	Leidos Holdings, Inc. 3 awardees, including Gibbs & Cox, Inc. and Leidos, Inc. Top agencies Army (Department of the Army) USDA (Department of Agriculture)	$3,154,174	2.0%	Rank history: not on the FY2021–FY2024 lists; up 131 since FY2024.
6	Nevada System of Higher Education Board of Regents Through Board of Regents of Nevada System of Higher Education Top agencies Army (Department of the Army)	$2,999,612	1.9%	Rank history: not on the FY2021–FY2024 lists; new.
7	The Research Foundation for the State University of New York 2 awardees Top agencies Army (Department of the Army)	$2,569,978	1.6%	Rank history: not on the FY2021 list, #81 in FY2022 and not on the FY2023–FY2024 lists; up 133 since FY2024.
8	Colorado State University Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense)	$2,181,650	1.4%	Rank history: not on the FY2021–FY2023 lists and #100 in FY2024; up 92 since FY2024.
9	Rector & Visitors of the University of Virginia Top agencies Army (Department of the Army)	$2,000,000	1.3%	Rank history: not on the FY2021–FY2024 lists; new.
10	Nevada System of Higher Education Top agencies Army (Department of the Army)	$1,768,567	1.1%	Rank history: not on the FY2021–FY2024 lists; new.
11	Creare LLC Top agencies Army (Department of the Army)	$1,701,113	1.1%	Rank history: not on the FY2021–FY2022 lists, #25 in FY2023 and #18 in FY2024; up 7 since FY2024.
12	Virginia Department of Wildlife Resources Top agencies NASA (National Aeronautics and Space Administration)	$1,683,205	1.1%	Rank history: not on the FY2021–FY2024 lists; new.
13	SMI Solutions, Inc. Top agencies Army (Department of the Army)	$1,597,813	1.0%	Rank history: not on the FY2021–FY2024 lists; new.
14	Biospyder Technologies, Inc. Top agencies EPA (Environmental Protection Agency)	$1,572,594	1.0%	Rank history: #2 in FY2021, #9 in FY2022, #21 in FY2023 and #9 in FY2024; down 5 since FY2024.
15	M2 Strategy Inc. Top agencies Commerce (Department of Commerce)	$1,450,787	0.9%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2024; up 11 since FY2024.
16	S.l. Ross Environmental Research Limited Top agencies DOI (Department of the Interior)	$1,374,044	0.9%	Rank history: not on the FY2021 list, #19 in FY2022 and not on the FY2023–FY2024 lists; up 114 since FY2024.
17	Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek TNO Top agencies Navy (Department of the Navy)	$1,263,996	0.8%	Rank history: not on the FY2021–FY2024 lists; new.
18	University of Hawaii Systems 3 awardees, including University of Hawaii Top agencies OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$823,848	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
19	Specpro Sustainment and Environmental, LLC Top agencies EPA (Environmental Protection Agency)	$795,060	0.5%	Rank history: not on the FY2021–FY2024 lists; new.
20	Trustees of the Colorado School of Mines Top agencies Army (Department of the Army)	$793,519	0.5%	Rank history: #33 in FY2021, #17 in FY2022, #41 in FY2023 and #5 in FY2024; down 15 since FY2024.
21	GSI North America Inc. Top agencies Army (Department of the Army)	$763,056	0.5%	Rank history: not on the FY2021–FY2023 lists and #46 in FY2024; up 25 since FY2024.
22	Water Institute of the Gulf Top agencies Army (Department of the Army)	$744,609	0.5%	Rank history: #28 in FY2021, #32 in FY2022 and not on the FY2023–FY2024 lists; up 93 since FY2024.
23	Arcadis U.s., Inc. Top agencies Army (Department of the Army)	$702,814	0.4%	Rank history: not on the FY2021 list, #80 in FY2022, not on the FY2023 list and #84 in FY2024; up 61 since FY2024.
24	Brown University Top agencies Army (Department of the Army)	$694,206	0.4%	Rank history: #87 in FY2021, #82 in FY2022, #64 in FY2023 and #34 in FY2024; up 10 since FY2024.
25	Upstream TECH Inc. Top agencies DOI (Department of the Interior)	$681,552	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
26	University of California Santa Cruz Top agencies Navy (Department of the Navy)	$662,481	0.4%	Rank history: not on the FY2021–FY2023 lists and #75 in FY2024; up 49 since FY2024.
27	Arizona State University Top agencies Army (Department of the Army)	$648,932	0.4%	Rank history: not on the FY2021 list, #97 in FY2022, #79 in FY2023 and #21 in FY2024; down 6 since FY2024.
28	Stockton Port District Top agencies Army (Department of the Army)	$642,200	0.4%	Rank history: not on the FY2021–FY2024 lists; new.
29	Blind and Vision Impaired Virginia Department for the Through Virginia Department of Wildlife Resources Top agencies NASA (National Aeronautics and Space Administration)	$625,941	0.4%	Rank history: not on the FY2021 list, #94 in FY2022, not on the FY2023 list and #15 in FY2024; down 14 since FY2024.
30	Environmental Assessment Services, LLC Top agencies Army (Department of the Army)	$602,062	0.4%	Rank history: not on the FY2021–FY2023 lists and #85 in FY2024; up 55 since FY2024.
31	University of Notre Dame DU Lac Top agencies Army (Department of the Army)	$576,217	0.4%	Rank history: #74 in FY2021, #59 in FY2022, #90 in FY2023 and not on the FY2024 list; returned.
32	Jacobs Engineering Group Inc. 2 awardees Top agencies Army (Department of the Army)	$535,469	0.3%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; down 13 since FY2024.
33	Interphase Materials, Inc. Top agencies OSD (Office of the Secretary of Defense)	$499,587	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
34	University System of Maryland 3 awardees, including University of Maryland Baltimore County and University of Maryland, College Park Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration)	$468,235	0.3%	Rank history: #22 in FY2021, #62 in FY2022, #2 in FY2023 and #79 in FY2024; up 45 since FY2024.
35	Conservation Science & Data Visualization LLC Top agencies Army (Department of the Army)	$447,504	0.3%	Rank history: not on the FY2021–FY2023 lists and #72 in FY2024; up 37 since FY2024.
36	Sapere Consulting Inc. Top agencies Army (Department of the Army)	$442,900	0.3%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2024; up 27 since FY2024.
37	Horsley Witten Group, Inc. Top agencies Commerce (Department of Commerce)	$430,706	0.3%	Rank history: not on the FY2021–FY2024 lists; up 90 since FY2024.
38	Worcester Polytechnic Institute Top agencies DOI (Department of the Interior)	$412,895	0.3%	Rank history: #58 in FY2021, #31 in FY2022, #32 in FY2023 and #89 in FY2024; up 51 since FY2024.
39	Geosyntec Consultants, Inc. Top agencies Army (Department of the Army)	$402,518	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
40	Aquatonomy, Inc. Top agencies Army (Department of the Army)	$400,000	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
41	Princeton Hydro L.L.C. Top agencies Army (Department of the Army)	$375,900	0.2%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; down 18 since FY2024.
42	The Regents of the University of California Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense)	$353,423	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
43	CDM Smith Inc. 2 awardees, including CDM Federal Programs Corporation Top agencies Army (Department of the Army)	$350,000	0.2%	Rank history: #14 in FY2021, #16 in FY2022, #43 in FY2023 and #39 in FY2024; down 4 since FY2024.
44	Bennett Aerospace Inc. Top agencies Army (Department of the Army)	$334,485	0.2%	Rank history: #9 in FY2021, #53 in FY2022, not on the FY2023 list and #77 in FY2024; up 33 since FY2024.
45	The University of Iowa Top agencies Army (Department of the Army)	$334,332	0.2%	Rank history: not on the FY2021 list, #54 in FY2022, #11 in FY2023 and not on the FY2024 list; up 152 since FY2024.
46	Tetra Tech, Inc. Top agencies EPA (Environmental Protection Agency)	$327,830	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
47	Syracuse University Top agencies Navy (Department of the Navy)	$300,748	0.2%	Rank history: not on the FY2021–FY2022 lists, #81 in FY2023 and #82 in FY2024; up 35 since FY2024.
48	Limno-Tech Inc. Top agencies Army (Department of the Army)	$275,610	0.2%	Rank history: #5 in FY2021, #7 in FY2022, #13 in FY2023 and #16 in FY2024; down 32 since FY2024.
49	Woods Hole Oceanographic Institution Top agencies Navy (Department of the Navy)	$262,267	0.2%	Rank history: not on the FY2021–FY2024 lists; up 80 since FY2024.
50	University of Arizona Top agencies Army (Department of the Army)	$258,677	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
51	Foundation for Marine Ecology and Telemetry Research Top agencies Navy (Department of the Navy)	$250,691	0.2%	Rank history: not on the FY2021–FY2024 lists; up 91 since FY2024.
52	Taylor-Woolpert, LLC Top agencies Army (Department of the Army)	$235,112	0.1%	Rank history: not on the FY2021–FY2023 lists and #2 in FY2024; down 50 since FY2024.
53	Hdr, Inc. Through HDR Environmental, Operations and Construction, Inc. Top agencies Navy (Department of the Navy)	$232,252	0.1%	Rank history: not on the FY2021 list, #40 in FY2022, #27 in FY2023 and #30 in FY2024; down 23 since FY2024.
54	Northern Arizona University Top agencies Army (Department of the Army)	$229,565	0.1%	Rank history: not on the FY2021–FY2023 lists and #56 in FY2024; up 2 since FY2024.
55	Water Mapping LLC Top agencies DOI (Department of the Interior)	$217,580	0.1%	Rank history: not on the FY2021–FY2024 lists; up 50 since FY2024.
56	HR Wallingford Limited Top agencies Army (Department of the Army)	$216,819	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
57	Anchor Qea, Inc. Top agencies Army (Department of the Army)	$213,840	0.1%	Rank history: #37 in FY2021, #52 in FY2022, #26 in FY2023 and #61 in FY2024; up 4 since FY2024.
58	University of Miami Top agencies Army (Department of the Army)	$200,000	0.1%	Rank history: not on the FY2021–FY2023 lists and #74 in FY2024; up 16 since FY2024.
59	Case Western Reserve University Top agencies Army (Department of the Army)	$200,000	0.1%	Rank history: not on the FY2021–FY2023 lists and #62 in FY2024; up 3 since FY2024.
60	Onterris, Inc. Through Onterris Treatment Technologies, Inc. Top agencies OSD (Office of the Secretary of Defense)	$200,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
61	Duran Environmental Consulting, LLC Top agencies Army (Department of the Army)	$196,800	0.1%	Rank history: not on the FY2021–FY2024 lists; up 71 since FY2024.
62	The University Court of the University of ST Andrews Top agencies Navy (Department of the Navy)	$196,054	0.1%	Rank history: #10 in FY2021, #14 in FY2022, #20 in FY2023 and #14 in FY2024; down 48 since FY2024.
63	Regents of the University of Michigan Top agencies Smithsonian (Smithsonian Institution) Navy (Department of the Navy)	$178,460	0.1%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; down 13 since FY2024.
64	Carbon Asset Solutions (Usa), Inc. Top agencies Army (Department of the Army)	$176,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
65	American Bureau of Shipping Top agencies DOT (Department of Transportation)	$166,500	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
66	Smru, LLC Top agencies Navy (Department of the Navy)	$161,227	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
67	Cornell University Top agencies Army (Department of the Army)	$156,311	0.1%	Rank history: #41 in FY2021, #92 in FY2022, #63 in FY2023 and #93 in FY2024; up 26 since FY2024.
68	The Trustees of the Stevens Institute of Technology Top agencies Army (Department of the Army)	$132,480	0.1%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023 and #38 in FY2024; down 30 since FY2024.
69	Integrated Laboratory Systems, LLC Top agencies EPA (Environmental Protection Agency)	$127,124	0.1%	Rank history: not on the FY2021–FY2023 lists and #66 in FY2024; down 3 since FY2024.
70	The Boeing Company Top agencies Army (Department of the Army)	$126,827	0.1%	Rank history: #50 in FY2021, #85 in FY2022, #48 in FY2023 and not on the FY2024 list; returned.
71	American Water Defense Services, LLC Top agencies Army (Department of the Army)	$126,137	0.1%	Rank history: not on the FY2021–FY2023 lists and #59 in FY2024; down 12 since FY2024.
72	Zara Environmental LLC Top agencies Army (Department of the Army)	$123,298	0.1%	Rank history: not on the FY2021–FY2024 lists; up 41 since FY2024.
73	University of California, Santa Barbara Top agencies Army (Department of the Army)	$120,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
74	Conservation Science Partners, Inc. Top agencies Army (Department of the Army)	$120,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2023 and #58 in FY2024; down 16 since FY2024.
75	Figure Eight Federal LLC Top agencies Army (Department of the Army)	$118,000	0.1%	Rank history: not on the FY2021–FY2024 lists; up 79 since FY2024.
76	Florida International University Top agencies Army (Department of the Army)	$106,341	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
77	Aquatechnex LLC Top agencies Army (Department of the Army)	$103,905	0.1%	Rank history: not on the FY2021–FY2024 lists; up 104 since FY2024.
78	Polaris Sensor Technologies, LLC Top agencies Army (Department of the Army)	$102,363	0.1%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2024; up 5 since FY2024.
79	Innotech Alberta Inc. Top agencies Army (Department of the Army)	$96,646	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
80	Clarkson University Top agencies Army (Department of the Army)	$96,603	0.1%	Rank history: #69 in FY2021 and not on the FY2022–FY2024 lists; up 65 since FY2024.
81	University of Texas System Through University of Texas At Austin Top agencies Army (Department of the Army)	$95,074	0.1%	Rank history: #76 in FY2021, #33 in FY2022, #34 in FY2023 and #51 in FY2024; down 30 since FY2024.
82	RB Becken, Inc. Top agencies USDA (Department of Agriculture)	$92,969	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
83	Sarah Lawrence College Top agencies Smithsonian (Smithsonian Institution)	$90,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
84	Oregon State University Top agencies Army (Department of the Army)	$89,997	0.1%	Rank history: not on the FY2021–FY2023 lists and #95 in FY2024; up 11 since FY2024.
85	Wapsi Valley Archaeology, Inc. Top agencies Army (Department of the Army)	$87,367	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
86	See LLC Top agencies Army (Department of the Army)	$79,183	0.1%	Rank history: not on the FY2021 list, #66 in FY2022 and not on the FY2023–FY2024 lists; returned.
87	University of Washington Top agencies Navy (Department of the Navy)	$76,613	<0.1%	Rank history: #25 in FY2021, #79 in FY2022, #86 in FY2023 and not on the FY2024 list; returned.
88	Bizsolutions 360 Inc. Top agencies Army (Department of the Army)	$76,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
89	Earthbalance Corporation Top agencies DOI (Department of the Interior)	$75,038	<0.1%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023 and #80 in FY2024; down 9 since FY2024.
90	Fish Research and Development LLC Top agencies Army (Department of the Army)	$75,000	<0.1%	Rank history: not on the FY2021 list, #30 in FY2022 and not on the FY2023–FY2024 lists; returned.
91	Florida Institute of Technology Inc. Top agencies Navy (Department of the Navy)	$74,447	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 80 since FY2024.
92	Walker Environmental Research LLC Top agencies EPA (Environmental Protection Agency)	$70,000	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 27 since FY2024.
93	Purdue University Top agencies Army (Department of the Army)	$67,315	<0.1%	Rank history: #31 in FY2021, #23 in FY2022, #62 in FY2023 and not on the FY2024 list; up 13 since FY2024.
94	Applied Ocean Sciences, LLC Top agencies Navy (Department of the Navy)	$67,261	<0.1%	Rank history: #30 in FY2021, #98 in FY2022 and not on the FY2023–FY2024 lists; returned.
95	Geomorph Information Systems LLC Top agencies USDA (Department of Agriculture)	$64,038	<0.1%	Rank history: not on the FY2021–FY2024 lists; up 96 since FY2024.
96	Fredericktowne Labs Inc. Top agencies Navy (Department of the Navy)	$56,224	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
97	NBW Inc. Top agencies NASA (National Aeronautics and Space Administration)	$53,562	<0.1%	Rank history: not on the FY2021–FY2024 lists; new.
98	Michigan State University Top agencies EPA (Environmental Protection Agency)	$52,866	<0.1%	Rank history: #86 in FY2021 and not on the FY2022–FY2024 lists; returned.
99	Trustees of Dartmouth College Top agencies Army (Department of the Army)	$50,000	<0.1%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; down 2 since FY2024.
100	Pisces Molecular LLC Top agencies DOI (Department of the Interior)	$49,910	<0.1%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2024; down 76 since FY2024.

Rankings for the codes under PSC AH

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 $157 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. An awardee whose own actions mostly name no parent, and that no other company's actions name as their parent, rolls up its SAM.gov registration's chain of parent companies: it counts under the first company there that other companies' actions name as their parent, or under the parent most of a company's own actions name, whichever comes first; with neither, under the highest company in the chain with federal contracts of its own. Joint ventures stay companies of their own. 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 2025 ran Oct 1, 2024 – Sep 30, 2025. 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 FY2024. "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 FY2024 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