Top 100 Contractors in NAICS 541620: Environmental Consulting Services, FY2023

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Tetra Tech, Inc. 13 awardees Top agencies EPA (Environmental Protection Agency) NASA (National Aeronautics and Space Administration) DOE (Department of Energy)	$119,195,316	7.9%	Rank history: #1 in FY2021, #1 in FY2022, #2 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	Eastern Research Group Inc. Top agencies EPA (Environmental Protection Agency) HHS (Department of Health and Human Services) DOL (Department of Labor)	$69,952,230	4.7%	Rank history: #3 in FY2021, #2 in FY2022, #1 in FY2024 and #3 in FY2025; unchanged since FY2022.
3	Project Enhancement Corporation Top agencies DOE (Department of Energy) DOL (Department of Labor)	$51,922,606	3.5%	Rank history: #4 in FY2021, #4 in FY2022, #4 in FY2024 and #4 in FY2025; up 1 since FY2022.
4	The Cadmus Group LLC Top agencies DHS (Department of Homeland Security) EPA (Environmental Protection Agency) USAID (US Agency for International Development)	$45,046,236	3.0%	Rank history: not on the FY2021 list, #17 in FY2022, #3 in FY2024 and #19 in FY2025; up 13 since FY2022.
5	Boston Government Services, LLC Top agencies DOE (Department of Energy)	$35,662,941	2.4%	Rank history: #2 in FY2021, #3 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
6	Weston Solutions Holdings, Inc. 4 awardees, including Weston Solutions Inc. Top agencies EPA (Environmental Protection Agency) DOT (Department of Transportation)	$28,265,076	1.9%	Rank history: #6 in FY2021, #6 in FY2022, #6 in FY2024 and #2 in FY2025; unchanged since FY2022.
7	Environmental Incentives, Inc. Top agencies USAID (US Agency for International Development)	$27,069,554	1.8%	Rank history: #5 in FY2021, #5 in FY2022, #11 in FY2024 and #34 in FY2025; down 2 since FY2022.
8	Lynker Corporation Top agencies Commerce (Department of Commerce)	$26,561,211	1.8%	Rank history: #15 in FY2021, #9 in FY2022, #8 in FY2024 and #5 in FY2025; up 1 since FY2022.
9	Solv LLC Top agencies USDA (Department of Agriculture) Commerce (Department of Commerce) DOJ (Department of Justice)	$25,450,621	1.7%	Rank history: #68 in FY2021, #52 in FY2022, #55 in FY2024 and not on the FY2025 list; up 43 since FY2022.
10	Consolidated Safety Services Incorporated Top agencies Commerce (Department of Commerce) HHS (Department of Health and Human Services) DOI (Department of the Interior)	$23,803,607	1.6%	Rank history: #14 in FY2021, #11 in FY2022, #10 in FY2024 and #22 in FY2025; up 1 since FY2022.
11	Environmental Management & Planning Solutions LLC 2 awardees Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$20,313,841	1.4%	Rank history: #21 in FY2021, #12 in FY2022 and not on the FY2024–FY2025 lists; up 1 since FY2022.
12	Sol Solutions, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$20,017,114	1.3%	Rank history: #7 in FY2021, #8 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
13	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies EPA (Environmental Protection Agency) DOT (Department of Transportation) DOI (Department of the Interior)	$17,789,797	1.2%	Rank history: #8 in FY2021, #7 in FY2022, #19 in FY2024 and not on the FY2025 list; down 6 since FY2022.
14	Weston-Techlaw JV LLC Top agencies EPA (Environmental Protection Agency)	$15,452,244	1.0%	Rank history: not on the FY2021 list, #30 in FY2022, #16 in FY2024 and #20 in FY2025; up 16 since FY2022.
15	CDM Smith Inc Through CDM Federal Programs Corporation Top agencies DHS (Department of Homeland Security)	$14,963,667	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
16	Skeo Solutions, Inc. Top agencies EPA (Environmental Protection Agency)	$14,174,969	0.9%	Rank history: #70 in FY2021, #10 in FY2022, #14 in FY2024 and #57 in FY2025; down 6 since FY2022.
17	Marstel-Day, LLC Top agencies Navy (Department of the Navy) DHA (Defense Health Agency) DOI (Department of the Interior)	$14,121,807	0.9%	Rank history: not on the FY2021 list, #41 in FY2022, #20 in FY2024 and #23 in FY2025; up 24 since FY2022.
18	DAI Global LLC Top agencies USAID (US Agency for International Development)	$13,920,222	0.9%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
19	Gryphon Environmental, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$13,841,725	0.9%	Rank history: #22 in FY2021, #16 in FY2022, #17 in FY2024 and #12 in FY2025; down 3 since FY2022.
20	Research Triangle Institute Top agencies EPA (Environmental Protection Agency) USDA (Department of Agriculture)	$12,507,041	0.8%	Rank history: #12 in FY2021, #15 in FY2022, #12 in FY2024 and #40 in FY2025; down 5 since FY2022.
21	Sundance Consultants, LLC Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) Army (Department of the Army)	$12,505,306	0.8%	Rank history: not on the FY2021 list, #89 in FY2022, #41 in FY2024 and #52 in FY2025; up 68 since FY2022.
22	Swca Incorporated Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$11,173,745	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 227 since FY2022.
23	Great Lakes Environmental Center, Inc. Top agencies EPA (Environmental Protection Agency) Army (Department of the Army) DOI (Department of the Interior)	$10,974,275	0.7%	Rank history: #60 in FY2021, #24 in FY2022, #21 in FY2024 and #37 in FY2025; up 1 since FY2022.
24	The Solution Foundry, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$10,689,710	0.7%	Rank history: #24 in FY2021, #14 in FY2022, #18 in FY2024 and #14 in FY2025; down 10 since FY2022.
25	Wood Environment & Infrastructure Solutions Inc. 2 awardees, including WSP USA Environment & Infrastructure Inc. Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior) USAF (Department of the Air Force)	$9,714,554	0.6%	Rank history: #11 in FY2021, #62 in FY2022, #78 in FY2024 and not on the FY2025 list; up 37 since FY2022.
26	AECOM 5 awardees, including AECOM Technical Services, Inc., AECOM International Inc. and AECOM Italia S.P.A. Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) Commerce (Department of Commerce)	$9,685,536	0.6%	Rank history: #20 in FY2021, #22 in FY2022, #31 in FY2024 and not on the FY2025 list; down 4 since FY2022.
27	LRS Federal LLC Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) USDA (Department of Agriculture)	$9,668,536	0.6%	Rank history: #30 in FY2021, #85 in FY2022 and not on the FY2024–FY2025 lists; up 58 since FY2022.
28	Jacobs Engineering Group Inc. 2 awardees, including Ch2M Hill, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$9,657,780	0.6%	Rank history: not on the FY2021 list, #26 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
29	Toeroek Associates, Inc. Top agencies EPA (Environmental Protection Agency) USDA (Department of Agriculture) DOI (Department of the Interior)	$9,509,608	0.6%	Rank history: #56 in FY2021, #18 in FY2022, #87 in FY2024 and #84 in FY2025; down 11 since FY2022.
30	WSP USA Solutions Inc. Top agencies DOT (Department of Transportation) DOE (Department of Energy) GSA (General Services Administration)	$9,354,266	0.6%	Rank history: #57 in FY2021, #28 in FY2022 and not on the FY2024–FY2025 lists; down 2 since FY2022.
31	Association of Consultants and Engineers Top agencies Navy (Department of the Navy)	$9,083,025	0.6%	Rank history: #44 in FY2021, #61 in FY2022, #65 in FY2024 and #70 in FY2025; up 30 since FY2022.
32	SRC Inc. Top agencies EPA (Environmental Protection Agency) HHS (Department of Health and Human Services)	$9,077,600	0.6%	Rank history: #23 in FY2021, #23 in FY2022, #29 in FY2024 and #75 in FY2025; down 9 since FY2022.
33	S C & A Inc. 2 awardees Top agencies EPA (Environmental Protection Agency) DHS (Department of Homeland Security) DOE (Department of Energy)	$8,781,267	0.6%	Rank history: #48 in FY2021, #47 in FY2022, #5 in FY2024 and #6 in FY2025; up 14 since FY2022.
34	Ciri Development Corporation 4 awardees, including North Wind Resource Consulting LLC and North Wind Site Services, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) USDA (Department of Agriculture)	$8,566,009	0.6%	Rank history: not on the FY2021–FY2022 lists, #100 in FY2024 and #36 in FY2025; new.
35	Aerostar Environmental and Construction LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$8,527,287	0.6%	Rank history: not on the FY2021 list, #49 in FY2022, #37 in FY2024 and #31 in FY2025; up 14 since FY2022.
36	Bluestone Environmental Group, Inc. Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army) USDA (Department of Agriculture)	$8,383,512	0.6%	Rank history: #86 in FY2021, #48 in FY2022, #24 in FY2024 and #16 in FY2025; up 12 since FY2022.
37	General Dynamics Corporation 2 awardees, including General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$7,496,438	0.5%	Rank history: #32 in FY2021, not on the FY2022 list, #7 in FY2024 and #9 in FY2025; up 100 since FY2022.
38	Environmental Research Group LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) Navy (Department of the Navy)	$7,241,169	0.5%	Rank history: not on the FY2021–FY2022 lists, #43 in FY2024 and #66 in FY2025; up 156 since FY2022.
39	Mabbett & Associates, Inc. Top agencies VA (Department of Veterans Affairs) GSA (General Services Administration) USDA (Department of Agriculture)	$7,134,812	0.5%	Rank history: #37 in FY2021, #39 in FY2022, #27 in FY2024 and #50 in FY2025; unchanged since FY2022.
40	Whitetail Environmental, LLC Top agencies Army (Department of the Army) DOI (Department of the Interior) DHA (Defense Health Agency)	$6,965,452	0.5%	Rank history: #91 in FY2021, #37 in FY2022, #40 in FY2024 and #99 in FY2025; down 3 since FY2022.
41	Genwest Systems Inc. Top agencies Commerce (Department of Commerce)	$6,771,127	0.5%	Rank history: #25 in FY2021, #25 in FY2022, #95 in FY2024 and #43 in FY2025; down 16 since FY2022.
42	Pb&A / CSS JV, Llc. Top agencies EPA (Environmental Protection Agency)	$6,587,932	0.4%	Rank history: not on the FY2021 list, #31 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
43	Tepa, LLC 3 awardees, including Tehama ECS LLC, Tehama, LLC and Tehama Technical Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) USDA (Department of Agriculture)	$6,417,667	0.4%	Rank history: not on the FY2021 list, #90 in FY2022 and not on the FY2024–FY2025 lists; up 47 since FY2022.
44	PG Environmental, LLC Top agencies DOI (Department of the Interior) EPA (Environmental Protection Agency) Treasury (Department of the Treasury)	$6,302,920	0.4%	Rank history: #43 in FY2021, #65 in FY2022 and not on the FY2024–FY2025 lists; up 21 since FY2022.
45	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$6,195,486	0.4%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2024 and #42 in FY2025; new.
46	Ardl Inc. Top agencies Army (Department of the Army) EPA (Environmental Protection Agency)	$6,103,851	0.4%	Rank history: #9 in FY2021, #99 in FY2022, not on the FY2024 list and #90 in FY2025; up 53 since FY2022.
47	Arctic Slope Regional Corporation 2 awardees, including Environmental Quality Management, Inc. Top agencies USAF (Department of the Air Force)	$5,945,832	0.4%	Rank history: #84 in FY2021, #75 in FY2022 and not on the FY2024–FY2025 lists; up 28 since FY2022.
48	Umyuaq Consulting Group, LLC Top agencies Army (Department of the Army)	$5,836,084	0.4%	Rank history: #46 in FY2021, #19 in FY2022, #62 in FY2024 and not on the FY2025 list; down 29 since FY2022.
49	Ahtna-Arcadis 8(A) JV, LLC Top agencies USAF (Department of the Air Force)	$5,718,901	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
50	ABT Global LLC 2 awardees Top agencies EPA (Environmental Protection Agency)	$5,702,807	0.4%	Rank history: #39 in FY2021, #34 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
51	Sundance EA Associates II Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DLA (Defense Logistics Agency)	$5,689,823	0.4%	Rank history: not on the FY2021 list, #67 in FY2022 and not on the FY2024–FY2025 lists; up 16 since FY2022.
52	Applied Environmental Inc. Top agencies WHS (DOD Washington Headquarters Service)	$5,556,433	0.4%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2024 and #55 in FY2025; new.
53	Hsg, LLC Top agencies NASA (National Aeronautics and Space Administration) USAF (Department of the Air Force) DOI (Department of the Interior)	$5,520,002	0.4%	Rank history: #50 in FY2021, #40 in FY2022, #36 in FY2024 and #21 in FY2025; down 13 since FY2022.
54	Blue World Research Institute Inc. Top agencies DOI (Department of the Interior)	$5,337,012	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 57 since FY2022.
55	Genscape Inc. Through The Sanborn Map Company, Inc. Top agencies USDA (Department of Agriculture)	$5,321,150	0.4%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 394 since FY2022.
56	Science Applications International Corporation Top agencies EPA (Environmental Protection Agency)	$5,279,390	0.4%	Rank history: #49 in FY2021, #84 in FY2022, #28 in FY2024 and #45 in FY2025; up 28 since FY2022.
57	Nakupuna Consulting LLC Top agencies USDA (Department of Agriculture) Navy (Department of the Navy) DHS (Department of Homeland Security)	$5,262,917	0.4%	Rank history: not on the FY2021 list, #79 in FY2022 and not on the FY2024–FY2025 lists; up 22 since FY2022.
58	Neptune and Company, Incorporated Top agencies DOE (Department of Energy) EPA (Environmental Protection Agency) DOI (Department of the Interior)	$5,111,869	0.3%	Rank history: not on the FY2021–FY2022 lists, #70 in FY2024 and #46 in FY2025; up 91 since FY2022.
59	Straughan Environmental, Inc. Top agencies NASA (National Aeronautics and Space Administration) USDA (Department of Agriculture) HHS (Department of Health and Human Services)	$4,906,378	0.3%	Rank history: #62 in FY2021, #71 in FY2022, #32 in FY2024 and #64 in FY2025; up 12 since FY2022.
60	Stantec Inc. 3 awardees, including Stantec Consulting Services Inc. Top agencies HHS (Department of Health and Human Services) DOT (Department of Transportation)	$4,719,896	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #27 in FY2025; new.
61	Horsley Witten Group, Inc. Top agencies EPA (Environmental Protection Agency) Commerce (Department of Commerce)	$4,712,046	0.3%	Rank history: #40 in FY2021, #70 in FY2022, #66 in FY2024 and not on the FY2025 list; up 9 since FY2022.
62	Bering Straits Native Corporation 2 awardees, including Bering Global Solutions, LLC and Stampede Ventures, Inc. Top agencies Army (Department of the Army) DOI (Department of the Interior)	$4,510,467	0.3%	Rank history: #73 in FY2021, not on the FY2022 list, not on the FY2024 list and #67 in FY2025; up 47 since FY2022.
63	Natives of Kodiak, Incorporated Through Environmental Assessment Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$4,498,377	0.3%	Rank history: not on the FY2021 list, #77 in FY2022 and not on the FY2024–FY2025 lists; up 14 since FY2022.
64	Ohana Environmental and Construction-Cabrera Remediation and Construction Ocrc 8A JV LLC Top agencies Army (Department of the Army)	$4,495,682	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	Seres Engineering & Services LLC 2 awardees, including Seres-Arcadis 8(A) JV, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$4,476,796	0.3%	Rank history: #63 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; down 38 since FY2022.
66	Cardno Emerging Markets USA Ltd. 2 awardees, including Stantec GS Inc. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) DOI (Department of the Interior)	$4,376,813	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 120 since FY2022.
67	Pi3E JV LLP Top agencies HHS (Department of Health and Human Services)	$4,370,496	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
68	Nelson Engineering Co. Top agencies HHS (Department of Health and Human Services) Commerce (Department of Commerce) DOI (Department of the Interior)	$4,133,260	0.3%	Rank history: #74 in FY2021, not on the FY2022 list, #46 in FY2024 and not on the FY2025 list; up 62 since FY2022.
69	Air Resource Specialists, Inc. Top agencies DOI (Department of the Interior) EPA (Environmental Protection Agency) USDA (Department of Agriculture)	$3,952,141	0.3%	Rank history: #81 in FY2021, #86 in FY2022, #86 in FY2024 and #98 in FY2025; up 17 since FY2022.
70	Spatial Front Inc Top agencies Commerce (Department of Commerce)	$3,941,736	0.3%	Rank history: not on the FY2021–FY2022 lists, #85 in FY2024 and #94 in FY2025; new.
71	Hydrogeologic, Inc. Top agencies NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$3,896,412	0.3%	Rank history: #98 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 31 since FY2022.
72	Specpro Professional Services, LLC Top agencies Army (Department of the Army)	$3,868,231	0.3%	Rank history: #61 in FY2021, #58 in FY2022 and not on the FY2024–FY2025 lists; down 14 since FY2022.
73	Earth Resources Technology, LLC Top agencies Commerce (Department of Commerce)	$3,782,733	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #63 in FY2025; up 32 since FY2022.
74	The Chenega Corporation Through Chenega Reliable Services LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$3,696,238	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 195 since FY2022.
75	Integrated Systems Solutions, Inc. Top agencies Commerce (Department of Commerce)	$3,667,372	0.2%	Rank history: #71 in FY2021, #50 in FY2022, #38 in FY2024 and #44 in FY2025; down 25 since FY2022.
76	Sol-Ageiss LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$3,652,193	0.2%	Rank history: not on the FY2021 list, #83 in FY2022 and not on the FY2024–FY2025 lists; up 7 since FY2022.
77	Environmental Management Support, Inc. Top agencies EPA (Environmental Protection Agency) DOI (Department of the Interior)	$3,650,756	0.2%	Rank history: #69 in FY2021, #96 in FY2022, #75 in FY2024 and #56 in FY2025; up 19 since FY2022.
78	Envirosystems Management Inc. Top agencies DOI (Department of the Interior) USDA (Department of Agriculture)	$3,646,490	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
79	Cardinal Point Captains Inc Top agencies Commerce (Department of Commerce) DOI (Department of the Interior)	$3,556,138	0.2%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2024 and #82 in FY2025; new.
80	General Dynamics Information Technology, Inc. Top agencies EPA (Environmental Protection Agency)	$3,531,523	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 52 since FY2022.
81	Oregon University System 2 awardees, including Oregon State University and Portland State University Top agencies DOI (Department of the Interior) Commerce (Department of Commerce)	$3,523,716	0.2%	Rank history: #33 in FY2021, #36 in FY2022 and not on the FY2024–FY2025 lists; down 45 since FY2022.
82	Ocean Associates Inc. Top agencies Commerce (Department of Commerce)	$3,513,102	0.2%	Rank history: #79 in FY2021, #63 in FY2022, #34 in FY2024 and #47 in FY2025; down 19 since FY2022.
83	Cherokee Nation 3 awardees, including Cherokee Federal Solutions, L.L.C. and Cherokee Nation Management & Consulting, L.l.c.. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOI (Department of the Interior)	$3,492,057	0.2%	Rank history: #31 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 24 since FY2022.
84	Meadows Cmpg, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$3,458,441	0.2%	Rank history: #76 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 100 since FY2022.
85	Sealaska Remediation Solutions, LLC Top agencies Army (Department of the Army)	$3,458,095	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 50 since FY2022.
86	The Great Basin Institute Top agencies DOI (Department of the Interior)	$3,457,878	0.2%	Rank history: #94 in FY2021, #57 in FY2022 and not on the FY2024–FY2025 lists; down 29 since FY2022.
87	EA Engineering, Science, and Technology, Inc., PBC Top agencies Army (Department of the Army)	$3,428,608	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
88	C.j. Seto Support Services, LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$3,427,201	0.2%	Rank history: #66 in FY2021, #72 in FY2022, #59 in FY2024 and not on the FY2025 list; down 16 since FY2022.
89	Pacific Federal Management Inc Top agencies Navy (Department of the Navy)	$3,423,485	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
90	G2 Archaeology Top agencies USDA (Department of Agriculture) DOI (Department of the Interior)	$3,419,947	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 156 since FY2022.
91	Pi2E JV LLP Top agencies HHS (Department of Health and Human Services) HUD (Department of Housing and Urban Development)	$3,392,097	0.2%	Rank history: #89 in FY2021, #45 in FY2022 and not on the FY2024–FY2025 lists; down 46 since FY2022.
92	Northland Research, Inc. Top agencies DHS (Department of Homeland Security)	$3,390,202	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 9 since FY2022.
93	Hikina 2 Komohana Consulting Inc. Top agencies DLA (Defense Logistics Agency)	$3,325,760	0.2%	Rank history: #82 in FY2021, #80 in FY2022, #93 in FY2024 and not on the FY2025 list; down 13 since FY2022.
94	Statistical Research Inc. Top agencies USDA (Department of Agriculture) DOI (Department of the Interior) Army (Department of the Army)	$3,324,008	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 44 since FY2022.
95	Oneida Nation Through Sustainment & Restoration Services, LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$3,316,376	0.2%	Rank history: #55 in FY2021, #51 in FY2022 and not on the FY2024–FY2025 lists; down 44 since FY2022.
96	Ati-Endyna JV, LLC Top agencies WHS (DOD Washington Headquarters Service)	$3,311,578	0.2%	Rank history: #75 in FY2021, #78 in FY2022, #79 in FY2024 and not on the FY2025 list; down 18 since FY2022.
97	Vanasse Hangen Brustlin, Inc. 2 awardees Top agencies DOI (Department of the Interior)	$3,296,504	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 22 since FY2022.
98	Rmec Environmental Inc Top agencies Army (Department of the Army) GSA (General Services Administration) USAF (Department of the Air Force)	$3,284,167	0.2%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2024 and #76 in FY2025; new.
99	Michael Klebl GMBH & Co. KG Through Klebl GMBH Top agencies Army (Department of the Army)	$3,262,226	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 278 since FY2022.
100	Aleut Technical Services, LLC Top agencies EPA (Environmental Protection Agency)	$3,211,133	0.2%	Rank history: not on the FY2021–FY2022 lists, #71 in FY2024 and #96 in FY2025; new.

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 $1.5 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 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.

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