Top 100 Contractors in NAICS 54133: Engineering Services, FY2025

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	General Dynamics Corporation 19 awardees, including Electric Boat Corporation, General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$7,497,247,867	13.5%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2024; unchanged since FY2024.
2	Lockheed Martin Corporation 33 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$2,241,133,193	4.0%	Rank history: #4 in FY2021, #5 in FY2022, #5 in FY2023 and #2 in FY2024; unchanged since FY2024.
3	RTX Corporation 45 awardees, including Raytheon Company, Range Generation Next LLC and Rockwell Collins, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$1,876,185,680	3.4%	Rank history: #2 in FY2021, #2 in FY2022, #3 in FY2023 and #4 in FY2024; up 1 since FY2024.
4	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. and Ultra Electronics Advanced Tactical Systems Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$1,771,108,073	3.2%	Rank history: #5 in FY2021, #4 in FY2022, #2 in FY2023 and #3 in FY2024; down 1 since FY2024.
5	Northrop Grumman Corporation 38 awardees, including Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$1,769,431,897	3.2%	Rank history: #3 in FY2021, #3 in FY2022, #4 in FY2023 and #5 in FY2024; unchanged since FY2024.
6	BAE Systems 12 awardees, including BAE Systems Technology Solutions & Services Inc., BAE Systems Land & Armaments L.P. and BAE Systems Information and Electronic Systems Integration Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$1,397,198,052	2.5%	Rank history: #10 in FY2021, #9 in FY2022, #6 in FY2023 and #6 in FY2024; unchanged since FY2024.
7	Tcom, L.P. Top agencies Army (Department of the Army)	$1,387,180,148	2.5%	Rank history: #44 in FY2021, #43 in FY2022, #47 in FY2023 and #40 in FY2024; up 33 since FY2024.
8	Science Applications International Corporation Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$1,320,799,818	2.4%	Rank history: #7 in FY2021, #7 in FY2022, #8 in FY2023 and #7 in FY2024; down 1 since FY2024.
9	Amentum Holdings, Inc. 14 awardees, including Amentum Services, Inc., JT4 LLC and Amentum Technology, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$1,177,327,651	2.1%	Rank history: not on the FY2021–FY2023 lists and #63 in FY2024; up 54 since FY2024.
10	CACI International Inc. 5 awardees, including Caci, Inc. - Federal and Caci Nss, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$1,140,135,312	2.0%	Rank history: #8 in FY2021, #11 in FY2022, #9 in FY2023 and #9 in FY2024; down 1 since FY2024.
11	The Boeing Company 16 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$893,260,497	1.6%	Rank history: #13 in FY2021, #8 in FY2022, #11 in FY2023 and #8 in FY2024; down 3 since FY2024.
12	Leidos Holdings, Inc. 14 awardees, including Leidos, Inc., Dynetics, Inc. and Stantec GS - WSP JV Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$822,136,763	1.5%	Rank history: #9 in FY2021, #12 in FY2022, #12 in FY2023 and #11 in FY2024; down 1 since FY2024.
13	L3Harris Technologies, Inc. 23 awardees, including L3Harris Interstate Electronics Corporation, L3Harris Technologies Integrated Systems L.P. and L3 Technologies, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Commerce (Department of Commerce)	$808,171,202	1.5%	Rank history: #6 in FY2021, #6 in FY2022, #7 in FY2023 and #13 in FY2024; unchanged since FY2024.
14	Huntington Ingalls Industries, Inc. 6 awardees, including HII Mission Technologies Corp, HII Technical Solutions Corporation and Huntington Ingalls Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$737,333,019	1.3%	Rank history: #20 in FY2021, #16 in FY2022, #14 in FY2023 and #10 in FY2024; down 4 since FY2024.
15	Serco Inc 3 awardees Top agencies Navy (Department of the Navy) PBGC (Pension Benefit Guaranty Corporation) USAF (Department of the Air Force)	$555,402,553	1.0%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023 and #15 in FY2024; unchanged since FY2024.
16	Peraton Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration)	$546,901,369	1.0%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2024; unchanged since FY2024.
17	Ameresco Inc. 2 awardees, including Ameresco Select, Inc. Top agencies GSA (General Services Administration) Navy (Department of the Navy) VA (Department of Veterans Affairs)	$538,413,528	1.0%	Rank history: #71 in FY2021, #45 in FY2022, #54 in FY2023 and #73 in FY2024; up 56 since FY2024.
18	Beyond New Horizons, LLC Top agencies USAF (Department of the Air Force)	$496,146,005	0.9%	Rank history: not on the FY2021–FY2024 lists; up 393 since FY2024.
19	V2X, Inc. 4 awardees, including V2X Aerospace LLC, V2X Systems LLC and Vectrus Systems LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) DHS (Department of Homeland Security)	$420,971,604	0.8%	Rank history: not on the FY2021–FY2023 lists and #36 in FY2024; up 17 since FY2024.
20	The Charles Stark Draper Laboratory, Inc. Top agencies Navy (Department of the Navy)	$398,714,815	0.7%	Rank history: #33 in FY2021, #32 in FY2022, #28 in FY2023 and #14 in FY2024; down 6 since FY2024.
21	Scientific Research Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$362,347,497	0.7%	Rank history: #21 in FY2021, #26 in FY2022, #22 in FY2023 and #24 in FY2024; up 3 since FY2024.
22	Tetra Tech, Inc. 30 awardees, including LS Technologies LLC, Advanced Management Technology, Inc. and Amyx Inc. Top agencies DOT (Department of Transportation) Army (Department of the Army) USAF (Department of the Air Force)	$343,358,866	0.6%	Rank history: #26 in FY2021, #21 in FY2022, #23 in FY2023 and #22 in FY2024; unchanged since FY2024.
23	Parsons Corporation 5 awardees, including Parsons Government Services Inc., Parsons Technical Services Inc. and Altamira Technologies Corp Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) Navy (Department of the Navy)	$309,852,048	0.6%	Rank history: #35 in FY2021, #38 in FY2022, #24 in FY2023 and #27 in FY2024; up 4 since FY2024.
24	KBR Wyle Services LLC 6 awardees, including KBR Services, LLC and Kord Technologies, LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) DOT (Department of Transportation)	$303,630,285	0.5%	Rank history: not on the FY2021–FY2023 lists and #23 in FY2024; down 1 since FY2024.
25	International Business Machines Corporation 2 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DMEA (Defense Microelectronics Activity)	$274,312,910	0.5%	Rank history: #65 in FY2021, #25 in FY2022, #25 in FY2023 and #26 in FY2024; up 1 since FY2024.
26	ManTech International Corporation 2 awardees, including Mantech Advanced Systems International, Inc. and Unison Software Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DOS (Department of State)	$262,316,395	0.5%	Rank history: not on the FY2021–FY2023 lists and #53 in FY2024; up 27 since FY2024.
27	BAE Systems Land & Armaments L.P. Top agencies Army (Department of the Army)	$253,659,606	0.5%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2024; up 5 since FY2024.
28	Jacobs Government Services Company 24 awardees, including Jacobs Engineering Group Inc., JE Architects / Engineers, P.C. and Jacobs BV A Joint Venture Top agencies Army (Department of the Army) DOT (Department of Transportation) Navy (Department of the Navy)	$250,598,543	0.5%	Rank history: not on the FY2021–FY2023 lists and #20 in FY2024; down 8 since FY2024.
29	Arctic Slope Regional Corporation 14 awardees, including Netcentric Technology, LLC, Asrc Federal System Solutions LLC and Agile Decision Sciences, LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) Army (Department of the Army)	$242,338,571	0.4%	Rank history: #56 in FY2021, #53 in FY2022, #59 in FY2023 and #46 in FY2024; up 17 since FY2024.
30	Systems Planning and Analysis, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$238,316,948	0.4%	Rank history: #74 in FY2021, #66 in FY2022, #61 in FY2023 and #37 in FY2024; up 7 since FY2024.
31	DCS Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$234,383,623	0.4%	Rank history: #40 in FY2021, #35 in FY2022, #40 in FY2023 and #34 in FY2024; up 3 since FY2024.
32	AECOM Technical Services, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$231,935,305	0.4%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2024; down 13 since FY2024.
33	Reliance Test & Technology, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$220,095,613	0.4%	Rank history: #41 in FY2021, #31 in FY2022, #33 in FY2023 and #33 in FY2024; unchanged since FY2024.
34	Deloitte Through Deloitte Consulting LLP Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) HHS (Department of Health and Human Services)	$214,784,004	0.4%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2024; down 9 since FY2024.
35	LMI Consulting, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$205,722,153	0.4%	Rank history: not on the FY2021 list, #33 in FY2022, #44 in FY2023 and #29 in FY2024; down 6 since FY2024.
36	Noblis, Inc. Top agencies DOT (Department of Transportation) DTRA (Defense Threat Reduction Agency) DHS (Department of Homeland Security)	$179,603,331	0.3%	Rank history: #37 in FY2021, #24 in FY2022, #19 in FY2023 and #30 in FY2024; down 6 since FY2024.
37	Trax International Corporation Top agencies Army (Department of the Army)	$178,764,392	0.3%	Rank history: #52 in FY2021, #49 in FY2022, #52 in FY2023 and #45 in FY2024; up 8 since FY2024.
38	Avantus Federal LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) OSD (Office of the Secretary of Defense)	$176,044,637	0.3%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023 and #39 in FY2024; up 1 since FY2024.
39	Hdr, Inc. 35 awardees, including HDR Environmental, Operations and Construction, Inc., HDR Engineering, Inc. and HDR Architecture, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$172,953,914	0.3%	Rank history: #28 in FY2021, #23 in FY2022, #31 in FY2023 and #42 in FY2024; up 3 since FY2024.
40	CEG Solutions LLC Top agencies GSA (General Services Administration) OPM (Office of Personnel Management) Army (Department of the Army)	$171,325,498	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
41	Burns & Mcdonnell Engineering Company, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$165,790,489	0.3%	Rank history: not on the FY2021–FY2023 lists and #48 in FY2024; up 7 since FY2024.
42	Credence Dynamo Solutions LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DHS (Department of Homeland Security)	$165,011,570	0.3%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2024; up 29 since FY2024.
43	The Mitre Corporation 2 awardees Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security)	$158,285,162	0.3%	Rank history: not on the FY2021–FY2024 lists; up 80 since FY2024.
44	Honeywell International Inc. 5 awardees, including Honeywell Building Solutions SES Corp Top agencies GSA (General Services Administration) Army (Department of the Army) USAF (Department of the Air Force)	$155,848,321	0.3%	Rank history: #51 in FY2021, #44 in FY2022, #48 in FY2023 and not on the FY2024 list; up 86 since FY2024.
45	Cherokee Nation Strategic Programs, L.L.C. Top agencies USAF (Department of the Air Force) DOS (Department of State) DHS (Department of Homeland Security)	$153,428,407	0.3%	Rank history: not on the FY2021–FY2023 lists and #49 in FY2024; up 4 since FY2024.
46	Fidelity Technologies Corporation Top agencies Navy (Department of the Navy)	$153,117,892	0.3%	Rank history: #97 in FY2021, #58 in FY2022, #56 in FY2023 and #41 in FY2024; down 5 since FY2024.
47	Applied Research Associates, Inc. Top agencies Army (Department of the Army) DTRA (Defense Threat Reduction Agency) DHS (Department of Homeland Security)	$151,611,873	0.3%	Rank history: not on the FY2021 list, #39 in FY2022, #34 in FY2023 and #38 in FY2024; down 9 since FY2024.
48	Resource Management Concepts, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$137,683,834	0.2%	Rank history: not on the FY2021 list, #96 in FY2022, #70 in FY2023 and #74 in FY2024; up 26 since FY2024.
49	M.c. Dean, Inc. Top agencies Navy (Department of the Navy) AOUSC (Administrative Office of the U.S. Courts) DISA (Defense Information Systems Agency)	$132,875,673	0.2%	Rank history: #79 in FY2021, #52 in FY2022, #58 in FY2023 and #56 in FY2024; up 7 since FY2024.
50	Bowhead Program Management & Operations, LLC Top agencies Navy (Department of the Navy)	$130,271,924	0.2%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and #55 in FY2024; up 5 since FY2024.
51	Valiant Global Defense Services Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$122,856,822	0.2%	Rank history: not on the FY2021–FY2023 lists and #70 in FY2024; up 19 since FY2024.
52	Constellation Newenergy Inc. Top agencies GSA (General Services Administration) Army (Department of the Army) Navy (Department of the Navy)	$120,932,434	0.2%	Rank history: not on the FY2021–FY2024 lists; up 418 since FY2024.
53	Precise Systems, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$119,007,904	0.2%	Rank history: #60 in FY2021, #48 in FY2022, #45 in FY2023 and #44 in FY2024; down 9 since FY2024.
54	Credence Management Solutions Limited Liability Company Top agencies USAID (US Agency for International Development) USAF (Department of the Air Force)	$117,232,258	0.2%	Rank history: #27 in FY2021, #27 in FY2022, #26 in FY2023 and #18 in FY2024; down 36 since FY2024.
55	WSM Pacific Siop, A Joint Venture Top agencies Navy (Department of the Navy)	$117,070,874	0.2%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and #59 in FY2024; up 4 since FY2024.
56	Mayvin, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) Army (Department of the Army)	$114,188,556	0.2%	Rank history: not on the FY2021 list, #64 in FY2022, #62 in FY2023 and #66 in FY2024; up 10 since FY2024.
57	Mele Associates Inc. Top agencies DOE (Department of Energy)	$112,071,044	0.2%	Rank history: not on the FY2021 list, #100 in FY2022, #79 in FY2023 and #68 in FY2024; up 11 since FY2024.
58	Noblis MSD LLC Top agencies Navy (Department of the Navy)	$109,106,882	0.2%	Rank history: #89 in FY2021, not on the FY2022–FY2023 lists and #50 in FY2024; down 8 since FY2024.
59	Miracle Systems LLC Top agencies DHS (Department of Homeland Security) DODEA (Department of Defense Education Activity)	$108,635,527	0.2%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; up 1 since FY2024.
60	Asgn Incorporated Through ECS Federal, LLC Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) Commerce (Department of Commerce)	$107,738,279	0.2%	Rank history: not on the FY2021–FY2024 lists; up 141 since FY2024.
61	Atlas Technologies Inc. Top agencies Navy (Department of the Navy)	$104,239,860	0.2%	Rank history: not on the FY2021–FY2023 lists and #65 in FY2024; up 4 since FY2024.
62	Gryphon Technologies L.C. Top agencies Navy (Department of the Navy)	$97,520,678	0.2%	Rank history: not on the FY2021–FY2023 lists and #43 in FY2024; down 19 since FY2024.
63	Apogee Engineering, LLC Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$94,181,629	0.2%	Rank history: #45 in FY2021, #60 in FY2022, not on the FY2023 list and #80 in FY2024; up 17 since FY2024.
64	Torch Technologies Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$93,759,510	0.2%	Rank history: #34 in FY2021, #37 in FY2022, #36 in FY2023 and #58 in FY2024; down 6 since FY2024.
65	Johnson Controls Government Systems, LLC Top agencies Army (Department of the Army) GSA (General Services Administration) Navy (Department of the Navy)	$91,403,510	0.2%	Rank history: not on the FY2021–FY2024 lists; up 122 since FY2024.
66	The Johns Hopkins University Applied Physics Laboratory LLC Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) Army (Department of the Army)	$90,624,515	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
67	Strategic Alliance Solutions LLC Top agencies MDA (DOD Missile Defense Agency)	$87,756,438	0.2%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2024; up 16 since FY2024.
68	CORE4CE LLC Top agencies DHA (Defense Health Agency) Navy (Department of the Navy)	$87,341,601	0.2%	Rank history: not on the FY2021–FY2023 lists and #61 in FY2024; down 7 since FY2024.
69	Black & Veatch Special Projects Corp. 2 awardees, including Black & Veatch - GEI JV Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$86,964,820	0.2%	Rank history: not on the FY2021–FY2024 lists; up 46 since FY2024.
70	Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force)	$85,745,350	0.2%	Rank history: not on the FY2021–FY2024 lists; up 46 since FY2024.
71	AECOM 26 awardees, including AECOM - B&V Usace Med Satoc JV, AECOM Services, LLC and AECOM Usa, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$84,523,198	0.2%	Rank history: #12 in FY2021, #10 in FY2022, #10 in FY2023 and #21 in FY2024; down 50 since FY2024.
72	American Systems Corporation 2 awardees Top agencies Navy (Department of the Navy) OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$83,420,518	0.1%	Rank history: #59 in FY2021, #88 in FY2022, #66 in FY2023 and #72 in FY2024; unchanged since FY2024.
73	Simventions Inc. Top agencies Navy (Department of the Navy)	$82,699,425	0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and #87 in FY2024; up 14 since FY2024.
74	Seacorp, LLC Top agencies Navy (Department of the Navy)	$80,917,853	0.1%	Rank history: not on the FY2021 list, #87 in FY2022, #90 in FY2023 and #81 in FY2024; up 7 since FY2024.
75	Noresco, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$79,650,189	0.1%	Rank history: not on the FY2021–FY2024 lists; up 193 since FY2024.
76	Spalding Consulting Inc. Top agencies Navy (Department of the Navy)	$78,074,158	0.1%	Rank history: not on the FY2021–FY2023 lists and #86 in FY2024; up 10 since FY2024.
77	Imagine One Technology & Management Ltd. Top agencies Navy (Department of the Navy)	$78,030,470	0.1%	Rank history: not on the FY2021–FY2024 lists; up 109 since FY2024.
78	Raytheon / Lockheed Martin Javelin JV Top agencies Army (Department of the Army)	$75,927,338	0.1%	Rank history: not on the FY2021–FY2024 lists; up 343 since FY2024.
79	Stantec Inc. 20 awardees, including Stantec Consulting Services Inc., Stantec GS Inc. and Fsb-Stantec JV Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$74,990,456	0.1%	Rank history: not on the FY2021–FY2022 lists, #73 in FY2023 and not on the FY2024 list; up 49 since FY2024.
80	Guidehouse Inc. 4 awardees, including Peraton Technology Services Inc., Guidehouse Digital LLC and Aptim Federal Services, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$74,314,095	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
81	Vsolvit LLC Top agencies Navy (Department of the Navy)	$73,557,481	0.1%	Rank history: not on the FY2021–FY2024 lists; up 44 since FY2024.
82	Indus Technology Inc. Top agencies Navy (Department of the Navy)	$72,752,633	0.1%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023 and #78 in FY2024; down 4 since FY2024.
83	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$70,598,312	0.1%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2024; down 19 since FY2024.
84	Rite-Solutions, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$70,581,527	0.1%	Rank history: not on the FY2021–FY2023 lists and #79 in FY2024; down 5 since FY2024.
85	Digiflight Incorporated Top agencies Army (Department of the Army)	$69,565,088	0.1%	Rank history: not on the FY2021–FY2022 lists, #84 in FY2023 and not on the FY2024 list; up 55 since FY2024.
86	Reliability & Performance Technologies, LLC Top agencies Navy (Department of the Navy)	$69,382,089	0.1%	Rank history: not on the FY2021–FY2024 lists; up 79 since FY2024.
87	Chartis Consulting Corporation Top agencies DHS (Department of Homeland Security) DOI (Department of the Interior) EPA (Environmental Protection Agency)	$69,106,306	0.1%	Rank history: not on the FY2021–FY2024 lists; up 164 since FY2024.
88	Delta Solutions & Strategies LLC Top agencies USAF (Department of the Air Force) USSOCOM (United States Special Operations Command)	$68,854,331	0.1%	Rank history: not on the FY2021–FY2023 lists and #96 in FY2024; up 8 since FY2024.
89	KMS Solutions, LLC Top agencies Navy (Department of the Navy)	$68,242,881	0.1%	Rank history: not on the FY2021–FY2024 lists; up 29 since FY2024.
90	Sigma Defense Systems LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DISA (Defense Information Systems Agency)	$67,932,763	0.1%	Rank history: not on the FY2021–FY2022 lists, #57 in FY2023 and not on the FY2024 list; up 13 since FY2024.
91	Tekla Research, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$67,171,353	0.1%	Rank history: not on the FY2021–FY2024 lists; up 11 since FY2024.
92	Ch2M Hill, Inc. Top agencies Navy (Department of the Navy) DOI (Department of the Interior) Army (Department of the Army)	$67,018,583	0.1%	Rank history: not on the FY2021–FY2023 lists and #57 in FY2024; down 35 since FY2024.
93	Bwxt Enrichment Operations, LLC Top agencies DOE (Department of Energy)	$67,000,000	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
94	Mclaughlin Research Corporation Top agencies Navy (Department of the Navy)	$66,148,578	0.1%	Rank history: #94 in FY2021, #99 in FY2022 and not on the FY2023–FY2024 lists; up 14 since FY2024.
95	Kratos Technology & Training Solutions, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$66,129,727	0.1%	Rank history: not on the FY2021–FY2024 lists; up 312 since FY2024.
96	Falconwood Top agencies Navy (Department of the Navy)	$66,013,820	0.1%	Rank history: #98 in FY2021, #94 in FY2022, #85 in FY2023 and not on the FY2024 list; up 9 since FY2024.
97	Southwest Range Services LLC Top agencies Army (Department of the Army)	$65,063,826	0.1%	Rank history: #72 in FY2021, #74 in FY2022, #83 in FY2023 and #89 in FY2024; down 8 since FY2024.
98	Resolution Consultants - An Aecom-Ensafe Joint Venture Top agencies Navy (Department of the Navy)	$64,973,858	0.1%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2023 and #97 in FY2024; down 1 since FY2024.
99	Chugach Technical Solutions LLC Top agencies Navy (Department of the Navy) USAID (US Agency for International Development) DHS (Department of Homeland Security)	$63,941,837	0.1%	Rank history: not on the FY2021–FY2023 lists and #52 in FY2024; down 47 since FY2024.
100	Aviation Systems Engineering Company Inc. Top agencies Navy (Department of the Navy)	$62,855,715	0.1%	Rank history: not on the FY2021–FY2024 lists; up 11 since FY2024.

Rankings for the codes under NAICS 54133

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 $55.7 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 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.

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