Top 100 Environmental Protection Agency Contractors, FY2022

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	EA Engineering, Science, and Technology, Inc., PBC Top NAICS codes 562910 Remediation Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$149,150,836	7.0%	Rank history: #5 in FY2021, #3 in FY2023, #3 in FY2024 and #7 in FY2025; up 4 since FY2021.
2	Environmental Restoration LLC Top NAICS codes 562910 Remediation Services	$134,696,247	6.3%	Rank history: #2 in FY2021, #5 in FY2023, #9 in FY2024 and #4 in FY2025; unchanged since FY2021.
3	General Dynamics Corporation 3 awardees, including General Dynamics Information Technology, Inc. Top NAICS codes 541512 Computer Systems Design Services 541519 Other Computer Related Services 541620 Environmental Consulting Services	$97,344,033	4.6%	Rank history: #1 in FY2021, #1 in FY2023, #2 in FY2024 and #2 in FY2025; down 2 since FY2021.
4	Tetra Tech, Inc. 14 awardees Top NAICS codes 541620 Environmental Consulting Services 562910 Remediation Services 541611 Administrative Management and General Management Consulting Services	$80,277,572	3.8%	Rank history: #4 in FY2021, #2 in FY2023, #5 in FY2024 and #9 in FY2025; unchanged since FY2021.
5	J.f. Brennan Company, Inc. Top NAICS codes 562910 Remediation Services	$78,846,700	3.7%	Rank history: not on the FY2021 list, #78 in FY2023, #26 in FY2024 and #85 in FY2025; new.
6	Eastern Research Group Inc. Top NAICS codes 541620 Environmental Consulting Services 541990 All Other Professional, Scientific, and Technical Services 541380 Testing Laboratories and Services	$62,624,598	2.9%	Rank history: #7 in FY2021, #7 in FY2023, #4 in FY2024 and #8 in FY2025; up 1 since FY2021.
7	Science Applications International Corporation 2 awardees Top NAICS codes 541512 Computer Systems Design Services 541620 Environmental Consulting Services	$58,482,813	2.8%	Rank history: #3 in FY2021, #58 in FY2023, #32 in FY2024 and #32 in FY2025; down 4 since FY2021.
8	CGI Technologies and Solutions Inc. Through CGI Federal Inc. Top NAICS codes 541512 Computer Systems Design Services 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services 541519 Other Computer Related Services	$58,006,282	2.7%	Rank history: #8 in FY2021, #14 in FY2023, #25 in FY2024 and not on the FY2025 list; unchanged since FY2021.
9	Camp Dresser & Mckee Inc. 4 awardees, including CDM Federal Programs Corporation Top NAICS codes 562910 Remediation Services 541330 Engineering Services 541620 Environmental Consulting Services	$54,258,097	2.6%	Rank history: #10 in FY2021, #50 in FY2023 and not on the FY2024–FY2025 lists; up 1 since FY2021.
10	ICF International, Inc. Through ICF Incorporated, L.L.C. Top NAICS codes 541620 Environmental Consulting Services 541611 Administrative Management and General Management Consulting Services 541990 All Other Professional, Scientific, and Technical Services	$44,954,526	2.1%	Rank history: #9 in FY2021, #10 in FY2023, #24 in FY2024 and not on the FY2025 list; down 1 since FY2021.
11	AECOM Through AECOM Technical Services, Inc. Top NAICS codes 562910 Remediation Services	$34,249,862	1.6%	Rank history: #23 in FY2021, #4 in FY2023, #78 in FY2024 and #84 in FY2025; up 12 since FY2021.
12	Weston Solutions Holdings, Inc. 3 awardees, including Weston Solutions Inc. Top NAICS codes 541620 Environmental Consulting Services 561210 Facilities Support Services	$32,880,921	1.5%	Rank history: #20 in FY2021, #18 in FY2023, #19 in FY2024 and #5 in FY2025; up 8 since FY2021.
13	Sevenson Environmental Services, Inc. Top NAICS codes 562910 Remediation Services	$32,731,792	1.5%	Rank history: #14 in FY2021, #19 in FY2023, #1 in FY2024 and #1 in FY2025; up 1 since FY2021.
14	Jacobs Engineering Group Inc. 9 awardees, including Ch2M Hill, Inc., Amentum Technology, Inc. and Blue Canopy Group, LLC Top NAICS codes 562910 Remediation Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541330 Engineering Services	$32,186,296	1.5%	Rank history: #6 in FY2021, #6 in FY2023, #74 in FY2024 and not on the FY2025 list; down 8 since FY2021.
15	Hydrogeologic, Inc. Top NAICS codes 562910 Remediation Services	$31,369,563	1.5%	Rank history: #15 in FY2021, #9 in FY2023, #6 in FY2024 and #11 in FY2025; unchanged since FY2021.
16	C M C, Inc. Top NAICS codes 562910 Remediation Services	$29,153,011	1.4%	Rank history: #32 in FY2021, #13 in FY2023, #23 in FY2024 and #51 in FY2025; up 16 since FY2021.
17	Ch2M Hill, Inc. Top NAICS codes 562910 Remediation Services	$28,758,924	1.4%	Rank history: #62 in FY2021, #100 in FY2023, #11 in FY2024 and #14 in FY2025; up 45 since FY2021.
18	Kemron Environmental Services, Inc. Top NAICS codes 562910 Remediation Services	$25,192,648	1.2%	Rank history: #16 in FY2021, #21 in FY2023 and not on the FY2024–FY2025 lists; down 2 since FY2021.
19	Arctic Slope Mission Services LLC Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$23,631,029	1.1%	Rank history: #13 in FY2021, #91 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2021.
20	Research Triangle Institute Top NAICS codes 541611 Administrative Management and General Management Consulting Services 541620 Environmental Consulting Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$22,794,599	1.1%	Rank history: #18 in FY2021, #16 in FY2023, #18 in FY2024 and #20 in FY2025; down 2 since FY2021.
21	Kemron / Arrowhead JV, LLC Top NAICS codes 562910 Remediation Services	$21,470,023	1.0%	Rank history: #41 in FY2021, #15 in FY2023 and not on the FY2024–FY2025 lists; up 20 since FY2021.
22	Aptim Federal Services LLC Top NAICS codes 562910 Remediation Services 541620 Environmental Consulting Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$21,324,746	1.0%	Rank history: #25 in FY2021, #22 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
23	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top NAICS codes 541512 Computer Systems Design Services 561621 Security Systems Services (except Locksmiths) 541620 Environmental Consulting Services	$21,299,425	1.0%	Rank history: #17 in FY2021, #24 in FY2023, #28 in FY2024 and #28 in FY2025; down 6 since FY2021.
24	Advanced Technology Systems Inc. Through Salient Crgt, Inc. Top NAICS codes 541512 Computer Systems Design Services	$19,000,000	0.9%	Rank history: not on the FY2021 list, #12 in FY2023, #17 in FY2024 and not on the FY2025 list; new.
25	General Dynamics Information Technology, Inc. Top NAICS codes 541512 Computer Systems Design Services 541519 Other Computer Related Services 541611 Administrative Management and General Management Consulting Services	$18,885,457	0.9%	Rank history: not on the FY2021 list, #39 in FY2023 and not on the FY2024–FY2025 lists; new.
26	Skeo Solutions, Inc. Top NAICS codes 541620 Environmental Consulting Services	$16,557,431	0.8%	Rank history: #72 in FY2021, #33 in FY2023, #43 in FY2024 and #69 in FY2025; up 46 since FY2021.
27	Governmentcio LLC Through Salient Crgt, Inc. Top NAICS codes 541512 Computer Systems Design Services	$16,000,000	0.8%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
28	Hdr, Inc. 3 awardees, including HDR Aptim LLC Top NAICS codes 562910 Remediation Services	$15,458,450	0.7%	Rank history: #38 in FY2021, #29 in FY2023, #70 in FY2024 and #40 in FY2025; up 10 since FY2021.
29	Patriot LLC Top NAICS codes 541512 Computer Systems Design Services	$14,960,665	0.7%	Rank history: #36 in FY2021, #43 in FY2023, #54 in FY2024 and #94 in FY2025; up 7 since FY2021.
30	Oak Ridge Associated Universities, Incorporated Top NAICS codes 541990 All Other Professional, Scientific, and Technical Services	$14,883,258	0.7%	Rank history: #28 in FY2021, #26 in FY2023, #44 in FY2024 and not on the FY2025 list; down 2 since FY2021.
31	Dell Federal Systems L.P. 2 awardees, including Dell Marketing L.P. Top NAICS codes 541519 Other Computer Related Services 334111 Electronic Computer Manufacturing 511210 Software Publishers	$14,833,947	0.7%	Rank history: #24 in FY2021, #25 in FY2023 and not on the FY2024–FY2025 lists; down 7 since FY2021.
32	The Cadmus Group LLC Top NAICS codes 541611 Administrative Management and General Management Consulting Services	$14,517,639	0.7%	Rank history: #34 in FY2021, #28 in FY2023, #12 in FY2024 and #34 in FY2025; up 2 since FY2021.
33	Nobis Engineering, Inc. Top NAICS codes 562910 Remediation Services	$13,799,239	0.6%	Rank history: #31 in FY2021, #95 in FY2023, #34 in FY2024 and not on the FY2025 list; down 2 since FY2021.
34	WSP USA Solutions Inc. Top NAICS codes 541330 Engineering Services	$13,611,186	0.6%	Rank history: not on the FY2021 list, #70 in FY2023, #92 in FY2024 and not on the FY2025 list; new.
35	Leisnoi Diversified Services, LLC Top NAICS codes 562910 Remediation Services	$12,325,729	0.6%	Rank history: #35 in FY2021, #45 in FY2023, #41 in FY2024 and #43 in FY2025; unchanged since FY2021.
36	Arcadis N.V. 2 awardees, including Arcadis U.s., Inc. Top NAICS codes 541330 Engineering Services	$12,190,290	0.6%	Rank history: #49 in FY2021, #68 in FY2023 and not on the FY2024–FY2025 lists; up 13 since FY2021.
37	MCP Computer Products Inc. Top NAICS codes 443120 Computer and Software Stores	$11,094,006	0.5%	Rank history: #27 in FY2021, #35 in FY2023, #55 in FY2024 and #42 in FY2025; down 10 since FY2021.
38	At&T Inc. 3 awardees, including At&T Enterprises, LLC and Att Mobility LLC Top NAICS codes 517110 Wired Telecommunications Carriers 541519 Other Computer Related Services 517919 All Other Telecommunications	$10,902,867	0.5%	Rank history: not on the FY2021 list, #27 in FY2023 and not on the FY2024–FY2025 lists; new.
39	EQ & CH Remediation Top NAICS codes 562910 Remediation Services	$10,322,810	0.5%	Rank history: #30 in FY2021, #38 in FY2023, #22 in FY2024 and not on the FY2025 list; down 9 since FY2021.
40	Skinner Development Inc Top NAICS codes 236220 Commercial and Institutional Building Construction	$9,954,935	0.5%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
41	Toeroek Associates, Inc. Top NAICS codes 541620 Environmental Consulting Services	$9,557,066	0.4%	Rank history: #59 in FY2021, #42 in FY2023, #88 in FY2024 and #72 in FY2025; up 18 since FY2021.
42	ABT Global LLC 2 awardees Top NAICS codes 541620 Environmental Consulting Services 541611 Administrative Management and General Management Consulting Services	$9,270,030	0.4%	Rank history: #39 in FY2021, #40 in FY2023 and not on the FY2024–FY2025 lists; down 3 since FY2021.
43	Techlaw, Inc. 2 awardees, including Techlaw Consultants Inc. Top NAICS codes 541380 Testing Laboratories and Services 562910 Remediation Services	$9,242,506	0.4%	Rank history: #46 in FY2021, #48 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
44	Arctic Slope Regional Corporation 5 awardees, including Environmental Quality Management, Inc., EQM Services, LLC and Asrc Federal Data Network Technologies, LLC Top NAICS codes 562910 Remediation Services 541512 Computer Systems Design Services 541519 Other Computer Related Services	$8,981,439	0.4%	Rank history: #12 in FY2021, #8 in FY2023, #36 in FY2024 and #3 in FY2025; down 32 since FY2021.
45	Red Rock Remediation JV Top NAICS codes 562910 Remediation Services	$8,678,481	0.4%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
46	SRC Inc. Top NAICS codes 541620 Environmental Consulting Services 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$8,612,789	0.4%	Rank history: #37 in FY2021, #51 in FY2023, #61 in FY2024 and #76 in FY2025; down 9 since FY2021.
47	A and M Engineering & Environmental Services, Inc. Top NAICS codes 562910 Remediation Services	$7,833,835	0.4%	Rank history: #42 in FY2021, not on the FY2023 list, #60 in FY2024 and #44 in FY2025; down 5 since FY2021.
48	Great Lakes Environmental Center, Inc. Top NAICS codes 541620 Environmental Consulting Services	$7,661,343	0.4%	Rank history: #70 in FY2021, #47 in FY2023, #58 in FY2024 and #64 in FY2025; up 22 since FY2021.
49	Systalex Corporation Top NAICS codes 541519 Other Computer Related Services 541511 Custom Computer Programming Services	$7,447,508	0.4%	Rank history: #43 in FY2021, #49 in FY2023, #42 in FY2024 and #41 in FY2025; down 6 since FY2021.
50	Maximus Inc. Through Maximus Federal Technology Solutions, LLC Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services	$7,340,916	0.3%	Rank history: not on the FY2021 list, #53 in FY2023 and not on the FY2024–FY2025 lists; new.
51	Chenega It Enterprise Services, LLC Top NAICS codes 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services	$7,108,713	0.3%	Rank history: #22 in FY2021, #60 in FY2023, #52 in FY2024 and #35 in FY2025; down 29 since FY2021.
52	Weston-Techlaw JV LLC Top NAICS codes 541620 Environmental Consulting Services	$6,656,565	0.3%	Rank history: not on the FY2021 list, #30 in FY2023, #46 in FY2024 and #36 in FY2025; up 151 since FY2021.
53	Lintech Global Inc. Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services	$6,584,843	0.3%	Rank history: #55 in FY2021 and not on the FY2023–FY2025 lists; up 2 since FY2021.
54	Industrial Economics Inc. Top NAICS codes 541620 Environmental Consulting Services 541611 Administrative Management and General Management Consulting Services	$6,483,574	0.3%	Rank history: #65 in FY2021, #76 in FY2023 and not on the FY2024–FY2025 lists; up 11 since FY2021.
55	Pb&A / CSS JV, Llc. Top NAICS codes 541620 Environmental Consulting Services	$6,427,248	0.3%	Rank history: not on the FY2021 list, #62 in FY2023 and not on the FY2024–FY2025 lists; new.
56	Battelle Memorial Institute Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541620 Environmental Consulting Services 541611 Administrative Management and General Management Consulting Services	$6,404,409	0.3%	Rank history: #44 in FY2021, #63 in FY2023, #63 in FY2024 and #78 in FY2025; down 12 since FY2021.
57	Pegasus Technical Services, Inc. Top NAICS codes 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$6,297,822	0.3%	Rank history: #45 in FY2021, #55 in FY2023, #65 in FY2024 and #60 in FY2025; down 12 since FY2021.
58	Data Systems Analysts Inc. Through Project Performance Company, LLC Top NAICS codes 541519 Other Computer Related Services	$5,855,726	0.3%	Rank history: #77 in FY2021, #83 in FY2023, #62 in FY2024 and #75 in FY2025; up 19 since FY2021.
59	B.E. Scaife Plumbing Company Inc Top NAICS codes 562910 Remediation Services	$5,218,922	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
60	Chemtech Consulting Group Inc. Top NAICS codes 541380 Testing Laboratories and Services	$5,132,730	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 73 since FY2021.
61	Southwest Research Institute Top NAICS codes 541330 Engineering Services 541380 Testing Laboratories and Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$5,065,070	0.2%	Rank history: #57 in FY2021 and not on the FY2023–FY2025 lists; down 4 since FY2021.
62	Veracity Consulting, Inc. Top NAICS codes 541519 Other Computer Related Services	$5,059,878	0.2%	Rank history: #68 in FY2021, #74 in FY2023, not on the FY2024 list and #73 in FY2025; up 6 since FY2021.
63	CDM A Joint Venture Top NAICS codes 562910 Remediation Services	$4,898,532	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
64	M.c. Dean, Inc. Top NAICS codes 541330 Engineering Services	$4,689,344	0.2%	Rank history: #50 in FY2021, #69 in FY2023, #57 in FY2024 and #63 in FY2025; down 14 since FY2021.
65	Consolidated Safety Services Incorporated Top NAICS codes 541380 Testing Laboratories and Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 541620 Environmental Consulting Services	$4,548,935	0.2%	Rank history: #53 in FY2021, #61 in FY2023, #95 in FY2024 and #45 in FY2025; down 12 since FY2021.
66	Hdr-Obg A Joint Venture Top NAICS codes 541330 Engineering Services	$4,547,772	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 40 since FY2021.
67	Otie-Pwt JV, LLC Top NAICS codes 562910 Remediation Services	$4,456,106	0.2%	Rank history: not on the FY2021 list, #75 in FY2023 and not on the FY2024–FY2025 lists; up 65 since FY2021.
68	Eurofins Scientific SE 4 awardees, including Testamerica Laboratories, Inc., Eurofins Eaton Analytical LLC and Eurofins Drinking Water and Wastewater West, LLC Top NAICS codes 541380 Testing Laboratories and Services	$4,348,001	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 198 since FY2021.
69	Kgsne JV II LLC Top NAICS codes 562910 Remediation Services	$4,300,000	0.2%	Rank history: not on the FY2021 list, #85 in FY2023, not on the FY2024 list and #61 in FY2025; new.
70	Montrose Environmental Group Inc. Through Pars Environmental Inc. Top NAICS codes 562910 Remediation Services 541620 Environmental Consulting Services	$4,263,720	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
71	SRA International Inc. Through General Dynamics Information Technology, Inc. Top NAICS codes 541620 Environmental Consulting Services 541330 Engineering Services 541519 Other Computer Related Services	$4,180,535	0.2%	Rank history: #11 in FY2021 and not on the FY2023–FY2025 lists; down 60 since FY2021.
72	Leidos Holdings, Inc. 5 awardees, including Leidos, Inc. Top NAICS codes 541512 Computer Systems Design Services 541511 Custom Computer Programming Services 541611 Administrative Management and General Management Consulting Services	$4,153,610	0.2%	Rank history: #61 in FY2021, #59 in FY2023 and not on the FY2024–FY2025 lists; down 11 since FY2021.
73	MPF Federal, LLC Top NAICS codes 541940 Veterinary Services 561210 Facilities Support Services 541990 All Other Professional, Scientific, and Technical Services	$4,105,937	0.2%	Rank history: #80 in FY2021, #82 in FY2023, #96 in FY2024 and not on the FY2025 list; up 7 since FY2021.
74	Sikich Federal Inc. Top NAICS codes 541512 Computer Systems Design Services	$3,991,233	0.2%	Rank history: #87 in FY2021 and not on the FY2023–FY2025 lists; up 13 since FY2021.
75	Diversified Protection Corp Top NAICS codes 561612 Security Guards and Patrol Services	$3,924,215	0.2%	Rank history: #60 in FY2021, #84 in FY2023, #91 in FY2024 and #86 in FY2025; down 15 since FY2021.
76	Nana Regional Corporation Inc Through Affigent, LLC Top NAICS codes 541519 Other Computer Related Services	$3,910,145	0.2%	Rank history: #67 in FY2021 and not on the FY2023–FY2025 lists; down 9 since FY2021.
77	Customer Value Partners, LLC Top NAICS codes 541512 Computer Systems Design Services	$3,817,828	0.2%	Rank history: #86 in FY2021 and not on the FY2023–FY2025 lists; up 9 since FY2021.
78	Wood Environment & Infrastructure Solutions Inc. 2 awardees, including WSP USA Environment & Infrastructure Inc. and Wood Programs Inc. Top NAICS codes 541620 Environmental Consulting Services 561210 Facilities Support Services 541380 Testing Laboratories and Services	$3,785,807	0.2%	Rank history: #26 in FY2021, #41 in FY2023, #68 in FY2024 and not on the FY2025 list; down 52 since FY2021.
79	Achuti LLC Top NAICS codes 238390 Other Building Finishing Contractors 238110 Poured Concrete Foundation and Structure Contractors 238990 All Other Specialty Trade Contractors	$3,693,842	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 141 since FY2021.
80	Bonner Analytical Testing Co Top NAICS codes 541380 Testing Laboratories and Services	$3,687,536	0.2%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #57 in FY2025; up 149 since FY2021.
81	Indigo IT, LLC Top NAICS codes 541513 Computer Facilities Management Services	$3,585,381	0.2%	Rank history: #83 in FY2021 and not on the FY2023–FY2025 lists; up 2 since FY2021.
82	Agilent Technologies, Inc. 2 awardees Top NAICS codes 334516 Analytical Laboratory Instrument Manufacturing 333912 Air and Gas Compressor Manufacturing	$3,543,294	0.2%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 29 since FY2021.
83	Deloitte LLP 3 awardees, including Deloitte Consulting LLP and Deloitte Financial Advisory Services LLP Top NAICS codes 541512 Computer Systems Design Services 541611 Administrative Management and General Management Consulting Services	$3,507,039	0.2%	Rank history: #52 in FY2021 and not on the FY2023–FY2025 lists; down 31 since FY2021.
84	WSP USA Environment & Infrastructure Inc. Top NAICS codes 541620 Environmental Consulting Services 561210 Facilities Support Services	$3,449,863	0.2%	Rank history: not on the FY2021 list, not on the FY2023 list, #64 in FY2024 and #26 in FY2025; up 308 since FY2021.
85	S C & A Inc. 2 awardees, including EC / R Incorporated Top NAICS codes 541620 Environmental Consulting Services	$3,328,403	0.2%	Rank history: #75 in FY2021, #67 in FY2023, #20 in FY2024 and #15 in FY2025; down 10 since FY2021.
86	Chemtex Environmental Laboratory, Inc. Top NAICS codes 541380 Testing Laboratories and Services	$3,302,542	0.2%	Rank history: not on the FY2021 list, not on the FY2023–FY2024 lists and #55 in FY2025; up 154 since FY2021.
87	Information International Associates Inc. 2 awardees, including Keylogic, LLC and Keylogic Associates, Inc. Top NAICS codes 541511 Custom Computer Programming Services 541519 Other Computer Related Services	$3,301,219	0.2%	Rank history: #78 in FY2021, #73 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2021.
88	Duke Energy Corporation Through Duke Energy Progress, LLC Top NAICS codes 221122 Electric Power Distribution	$3,300,000	0.2%	Rank history: #64 in FY2021, #96 in FY2023, #90 in FY2024 and not on the FY2025 list; down 24 since FY2021.
89	Cetacean Marine Inc. Top NAICS codes 483114 Coastal and Great Lakes Passenger Transportation	$3,253,980	0.2%	Rank history: not on the FY2021 list, #81 in FY2023 and not on the FY2024–FY2025 lists; up 79 since FY2021.
90	B&V E&E JV Top NAICS codes 562910 Remediation Services	$3,228,348	0.2%	Rank history: #90 in FY2021 and not on the FY2023–FY2025 lists; unchanged since FY2021.
91	University of North Carolina at Chapel Hill 3 awardees, including North Carolina State University Top NAICS codes 519120 Libraries and Archives 541620 Environmental Consulting Services 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)	$3,108,806	0.1%	Rank history: #74 in FY2021, #94 in FY2023 and not on the FY2024–FY2025 lists; down 17 since FY2021.
92	Innovate! Inc. Top NAICS codes 541519 Other Computer Related Services 541512 Computer Systems Design Services	$3,090,577	0.1%	Rank history: #40 in FY2021 and not on the FY2023–FY2025 lists; down 52 since FY2021.
93	Deloitte Consulting LLP Top NAICS codes 541512 Computer Systems Design Services 541612 Human Resources Consulting Services	$3,037,071	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; new.
94	Verizon Communications Inc. Through Cellco Partnership Top NAICS codes 541519 Other Computer Related Services	$3,006,156	0.1%	Rank history: #88 in FY2021, #93 in FY2023 and not on the FY2024–FY2025 lists; down 6 since FY2021.
95	Gartner, Inc. Top NAICS codes 541690 Other Scientific and Technical Consulting Services 541620 Environmental Consulting Services 541519 Other Computer Related Services	$2,941,800	0.1%	Rank history: #98 in FY2021, #66 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2021.
96	Serco North America (Holdings) Inc Through Serco Inc. Top NAICS codes 541380 Testing Laboratories and Services	$2,850,992	0.1%	Rank history: not on the FY2021 list and not on the FY2023–FY2025 lists; up 5 since FY2021.
97	Thomas Scientific LLC 2 awardees, including Unison Software Inc. Top NAICS codes 511210 Software Publishers 334516 Analytical Laboratory Instrument Manufacturing	$2,829,725	0.1%	Rank history: #89 in FY2021 and not on the FY2023–FY2025 lists; down 8 since FY2021.
98	Versar-Envirocon JV Top NAICS codes 562910 Remediation Services	$2,738,756	0.1%	Rank history: not on the FY2021 list, #52 in FY2023, not on the FY2024 list and #93 in FY2025; new.
99	Environmental Management Support, Inc. Top NAICS codes 541620 Environmental Consulting Services	$2,719,716	0.1%	Rank history: #71 in FY2021, #92 in FY2023, #93 in FY2024 and #68 in FY2025; down 28 since FY2021.
100	Horsley Witten Group, Inc. Top NAICS codes 541620 Environmental Consulting Services	$2,682,610	0.1%	Rank history: #56 in FY2021, #86 in FY2023, #84 in FY2024 and not on the FY2025 list; down 44 since FY2021.

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 $2.12 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 2022 ran Oct 1, 2021 – Sep 30, 2022. 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 FY2021. "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 FY2021 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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