Top 100 Contractors in NAICS 541330: Engineering Services, FY2024

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	General Dynamics Corporation 18 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) Army (Department of the Army)	$6,095,490,496	10.9%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2023 and #1 in FY2025; unchanged since FY2023.
2	Lockheed Martin Corporation 34 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$2,628,311,960	4.7%	Rank history: #4 in FY2021, #5 in FY2022, #5 in FY2023 and #2 in FY2025; up 3 since FY2023.
3	Booz Allen Hamilton Holding Corporation 3 awardees, including Booz Allen Hamilton Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$2,127,380,375	3.8%	Rank history: #5 in FY2021, #4 in FY2022, #2 in FY2023 and #4 in FY2025; down 1 since FY2023.
4	RTX Corporation 65 awardees, including Raytheon Company, Rockwell Collins, Inc. and Noresco, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$2,021,259,325	3.6%	Rank history: #2 in FY2021, #2 in FY2022, #3 in FY2023 and #3 in FY2025; down 1 since FY2023.
5	Northrop Grumman Corporation 49 awardees, including Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$1,654,436,815	3.0%	Rank history: #3 in FY2021, #3 in FY2022, #4 in FY2023 and #5 in FY2025; down 1 since FY2023.
6	BAE Systems 20 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)	$1,244,080,629	2.2%	Rank history: #10 in FY2021, #9 in FY2022, #6 in FY2023 and #6 in FY2025; unchanged since FY2023.
7	Science Applications International Corporation 8 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DOT (Department of Transportation)	$1,145,676,190	2.0%	Rank history: #7 in FY2021, #7 in FY2022, #8 in FY2023 and #8 in FY2025; up 1 since FY2023.
8	The Boeing Company 29 awardees, including Insitu, Inc. and Boeing Aerospace Operations, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$1,052,143,383	1.9%	Rank history: #13 in FY2021, #8 in FY2022, #11 in FY2023 and #11 in FY2025; up 3 since FY2023.
9	CACI International Inc. 4 awardees, including Caci, Inc. - Federal, Caci Nss, LLC and Caci Technologies, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$931,381,286	1.7%	Rank history: #8 in FY2021, #11 in FY2022, #9 in FY2023 and #10 in FY2025; unchanged since FY2023.
10	Huntington Ingalls Industries, Inc. 7 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)	$921,184,776	1.6%	Rank history: #20 in FY2021, #16 in FY2022, #14 in FY2023 and #14 in FY2025; up 4 since FY2023.
11	Leidos Holdings, Inc. 19 awardees, including Leidos, Inc., Stantec GS - WSP JV and Cardno Tec-Leidos, LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$857,886,152	1.5%	Rank history: #9 in FY2021, #12 in FY2022, #12 in FY2023 and #12 in FY2025; up 1 since FY2023.
12	Amentum Services, Inc. 8 awardees, including JT4 LLC, Dyncorp International LLC and Centra Technology, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$849,053,048	1.5%	Rank history: #18 in FY2021, #20 in FY2022, #20 in FY2023 and not on the FY2025 list; up 8 since FY2023.
13	L3Harris Technologies, Inc. 26 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) Army (Department of the Army)	$747,079,335	1.3%	Rank history: #6 in FY2021, #6 in FY2022, #7 in FY2023 and #13 in FY2025; down 6 since FY2023.
14	The Charles Stark Draper Laboratory, Inc. Top agencies Navy (Department of the Navy)	$553,989,909	1.0%	Rank history: #33 in FY2021, #32 in FY2022, #28 in FY2023 and #20 in FY2025; up 14 since FY2023.
15	Serco Inc 3 awardees, including Serco-Ips Corporation Top agencies Navy (Department of the Navy) PBGC (Pension Benefit Guaranty Corporation) USAF (Department of the Air Force)	$541,593,390	1.0%	Rank history: not on the FY2021–FY2022 lists, #27 in FY2023 and #15 in FY2025; up 12 since FY2023.
16	Peraton Inc. Top agencies USAF (Department of the Air Force) NASA (National Aeronautics and Space Administration) Army (Department of the Army)	$533,642,841	1.0%	Rank history: not on the FY2021–FY2023 lists and #16 in FY2025; new.
17	Smartronix, LLC Top agencies Navy (Department of the Navy)	$435,756,282	0.8%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
18	Credence Management Solutions Limited Liability Company Top agencies USAID (US Agency for International Development) USAF (Department of the Air Force) Army (Department of the Army)	$417,808,060	0.7%	Rank history: #27 in FY2021, #27 in FY2022, #26 in FY2023 and #54 in FY2025; up 8 since FY2023.
19	AECOM Technical Services, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) DHS (Department of Homeland Security)	$405,894,763	0.7%	Rank history: not on the FY2021–FY2023 lists and #32 in FY2025; new.
20	Jacobs Government Services Company 25 awardees, including Amentum Technology, Inc., Jacobs / B&V, A Joint Venture (Federal Services) and Jacobs Engineering Group Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$395,240,564	0.7%	Rank history: not on the FY2021–FY2023 lists and #28 in FY2025; up 161 since FY2023.
21	AECOM 29 awardees, including JT4 LLC, AECOM Services, Inc. and AECOM International Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$361,820,068	0.6%	Rank history: #12 in FY2021, #10 in FY2022, #10 in FY2023 and #71 in FY2025; down 11 since FY2023.
22	Tetra Tech, Inc. 30 awardees, including LS Technologies LLC, Advanced Management Technology, Inc. and Bluewater Federal Solutions, Inc. Top agencies DOT (Department of Transportation) USAID (US Agency for International Development) Army (Department of the Army)	$348,594,605	0.6%	Rank history: #26 in FY2021, #21 in FY2022, #23 in FY2023 and #22 in FY2025; up 1 since FY2023.
23	KBR Wyle Services LLC 7 awardees, including KBR Services, LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) DHA (Defense Health Agency)	$337,465,798	0.6%	Rank history: not on the FY2021–FY2023 lists and #24 in FY2025; up 164 since FY2023.
24	Scientific Research Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$337,266,120	0.6%	Rank history: #21 in FY2021, #26 in FY2022, #22 in FY2023 and #21 in FY2025; down 2 since FY2023.
25	Deloitte Through Deloitte Consulting LLP Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy) USDA (Department of Agriculture)	$332,248,944	0.6%	Rank history: not on the FY2021–FY2023 lists and #34 in FY2025; new.
26	International Business Machines Corporation 3 awardees Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DMEA (Defense Microelectronics Activity)	$318,869,468	0.6%	Rank history: #65 in FY2021, #25 in FY2022, #25 in FY2023 and #25 in FY2025; down 1 since FY2023.
27	Parsons Corporation 8 awardees, including Parsons Government Services Inc., Parsons Technical Services Inc. and Parsons-Versar Joint Venture Top agencies Navy (Department of the Navy) DOE (Department of Energy) DTRA (Defense Threat Reduction Agency)	$300,617,368	0.5%	Rank history: #35 in FY2021, #38 in FY2022, #24 in FY2023 and #23 in FY2025; down 3 since FY2023.
28	Caci Technologies LLC 3 awardees, including Caci, Inc. - Federal and Caci Nss, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$291,580,064	0.5%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
29	LMI Consulting, LLC Top agencies DHS (Department of Homeland Security) Army (Department of the Army) OSD (Office of the Secretary of Defense)	$274,658,994	0.5%	Rank history: not on the FY2021 list, #33 in FY2022, #44 in FY2023 and #35 in FY2025; up 15 since FY2023.
30	Noblis, Inc. 2 awardees, including Noblis MSD LLC Top agencies DOT (Department of Transportation) DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$227,486,627	0.4%	Rank history: #37 in FY2021, #24 in FY2022, #19 in FY2023 and #36 in FY2025; down 11 since FY2023.
31	National Aerospace Solutions, LLC Top agencies USAF (Department of the Air Force) WHS (DOD Washington Headquarters Service)	$227,362,966	0.4%	Rank history: #87 in FY2021, not on the FY2022–FY2023 lists and not on the FY2025 list; returned.
32	BAE Systems Land & Armaments L.P. Top agencies Army (Department of the Army)	$204,684,927	0.4%	Rank history: not on the FY2021–FY2023 lists and #27 in FY2025; new.
33	Reliance Test & Technology, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$203,282,409	0.4%	Rank history: #41 in FY2021, #31 in FY2022, #33 in FY2023 and #33 in FY2025; unchanged since FY2023.
34	DCS Corporation Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$192,117,601	0.3%	Rank history: #40 in FY2021, #35 in FY2022, #40 in FY2023 and #31 in FY2025; up 6 since FY2023.
35	Range Generation Next LLC Top agencies USAF (Department of the Air Force)	$186,574,863	0.3%	Rank history: #24 in FY2021, #30 in FY2022, #29 in FY2023 and not on the FY2025 list; down 6 since FY2023.
36	V2X, Inc. 3 awardees, including V2X Aerospace LLC, V2X Systems LLC and Vectrus Systems LLC Top agencies Army (Department of the Army) Navy (Department of the Navy)	$169,685,777	0.3%	Rank history: not on the FY2021–FY2023 lists and #19 in FY2025; new.
37	Systems Planning and Analysis, Inc. Top agencies Navy (Department of the Navy)	$160,811,825	0.3%	Rank history: #74 in FY2021, #66 in FY2022, #61 in FY2023 and #30 in FY2025; up 24 since FY2023.
38	Applied Research Associates, Inc. 2 awardees Top agencies Army (Department of the Army) DHS (Department of Homeland Security) DTRA (Defense Threat Reduction Agency)	$157,330,406	0.3%	Rank history: not on the FY2021 list, #39 in FY2022, #34 in FY2023 and #47 in FY2025; down 4 since FY2023.
39	Avantus Federal LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) DHS (Department of Homeland Security)	$153,469,624	0.3%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2023 and #38 in FY2025; up 48 since FY2023.
40	Tcom, L.P. Top agencies Army (Department of the Army)	$148,561,512	0.3%	Rank history: #44 in FY2021, #43 in FY2022, #47 in FY2023 and #7 in FY2025; up 7 since FY2023.
41	Fidelity Technologies Corporation Top agencies Navy (Department of the Navy)	$146,160,460	0.3%	Rank history: #97 in FY2021, #58 in FY2022, #56 in FY2023 and #46 in FY2025; up 15 since FY2023.
42	Hdr, Inc. 33 awardees, including HDR Engineering, Inc of the Carolinas, HDR Environmental, Operations and Construction, Inc. and HDR Engineering, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DOI (Department of the Interior)	$139,985,528	0.2%	Rank history: #28 in FY2021, #23 in FY2022, #31 in FY2023 and #39 in FY2025; down 11 since FY2023.
43	Gryphon Technologies L.C. Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$137,330,219	0.2%	Rank history: not on the FY2021–FY2023 lists and #62 in FY2025; new.
44	Precise Systems, Inc. Top agencies Navy (Department of the Navy) MDA (DOD Missile Defense Agency)	$137,046,853	0.2%	Rank history: #60 in FY2021, #48 in FY2022, #45 in FY2023 and #53 in FY2025; up 1 since FY2023.
45	Trax International Corporation Top agencies Army (Department of the Army)	$136,916,222	0.2%	Rank history: #52 in FY2021, #49 in FY2022, #52 in FY2023 and #37 in FY2025; up 7 since FY2023.
46	Arctic Slope Regional Corporation 8 awardees, including Asrc Federal System Solutions LLC, Netcentric Technology, LLC and Asrc Federal Professional Services, LLC Top agencies USAF (Department of the Air Force) DOT (Department of Transportation) Army (Department of the Army)	$130,718,555	0.2%	Rank history: #56 in FY2021, #53 in FY2022, #59 in FY2023 and #29 in FY2025; up 13 since FY2023.
47	Bechtel Corp Through National Aerospace Solutions, LLC Top agencies USAF (Department of the Air Force)	$127,949,377	0.2%	Rank history: #25 in FY2021, #19 in FY2022, #17 in FY2023 and not on the FY2025 list; down 30 since FY2023.
48	Burns & Mcdonnell Engineering Company, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$126,628,723	0.2%	Rank history: not on the FY2021–FY2023 lists and #41 in FY2025; new.
49	Cherokee Nation Strategic Programs, L.L.C. Top agencies USAF (Department of the Air Force) DHS (Department of Homeland Security) Treasury (Department of the Treasury)	$125,845,326	0.2%	Rank history: not on the FY2021–FY2023 lists and #45 in FY2025; new.
50	Noblis MSD LLC 2 awardees, including Noblis, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army)	$115,864,295	0.2%	Rank history: #89 in FY2021, not on the FY2022–FY2023 lists and #58 in FY2025; returned.
51	L3HARRIS Aviation Products Inc 9 awardees, including L3Harris Technologies Integrated Systems L.P., L3 Technologies, Inc. and L3Harris Technologies, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$115,440,324	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 269 since FY2023.
52	Chugach Technical Solutions LLC Top agencies Navy (Department of the Navy) USAID (US Agency for International Development) DHS (Department of Homeland Security)	$115,247,055	0.2%	Rank history: not on the FY2021–FY2023 lists and #99 in FY2025; new.
53	ManTech International Corporation Through Mantech Advanced Systems International, Inc. Top agencies Navy (Department of the Navy) DOS (Department of State) Army (Department of the Army)	$115,142,931	0.2%	Rank history: not on the FY2021–FY2023 lists and #26 in FY2025; new.
54	The Mitre Corporation 2 awardees Top agencies DOT (Department of Transportation) NASA (National Aeronautics and Space Administration)	$113,033,869	0.2%	Rank history: #11 in FY2021, #36 in FY2022, #39 in FY2023 and not on the FY2025 list; down 15 since FY2023.
55	Bowhead Program Management & Operations, LLC Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security)	$110,743,435	0.2%	Rank history: not on the FY2021–FY2022 lists, #69 in FY2023 and #50 in FY2025; up 14 since FY2023.
56	M.c. Dean, Inc. Top agencies Navy (Department of the Navy) AOUSC (Administrative Office of the U.S. Courts) EPA (Environmental Protection Agency)	$108,136,789	0.2%	Rank history: #79 in FY2021, #52 in FY2022, #58 in FY2023 and #49 in FY2025; up 2 since FY2023.
57	Ch2M Hill, Inc. Top agencies Navy (Department of the Navy) NASA (National Aeronautics and Space Administration) DLA (Defense Logistics Agency)	$107,592,234	0.2%	Rank history: not on the FY2021–FY2023 lists and #92 in FY2025; new.
58	Torch Technologies Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$103,275,057	0.2%	Rank history: #34 in FY2021, #37 in FY2022, #36 in FY2023 and #64 in FY2025; down 22 since FY2023.
59	WSM Pacific Siop, A Joint Venture Top agencies Navy (Department of the Navy)	$102,636,338	0.2%	Rank history: not on the FY2021–FY2022 lists, #93 in FY2023 and #55 in FY2025; up 34 since FY2023.
60	Miracle Systems LLC Top agencies DHS (Department of Homeland Security) DODEA (Department of Defense Education Activity) USAF (Department of the Air Force)	$101,940,847	0.2%	Rank history: not on the FY2021–FY2023 lists and #59 in FY2025; up 68 since FY2023.
61	CORE4CE LLC Top agencies Navy (Department of the Navy) DHA (Defense Health Agency)	$95,385,291	0.2%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2025; new.
62	Honeywell International Inc. 6 awardees, including Honeywell Building Solutions SES Corp Top agencies GSA (General Services Administration) Army (Department of the Army) USAF (Department of the Air Force)	$95,324,156	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 394 since FY2023.
63	Amentum Holdings, Inc. 2 awardees, including Amentum Services, Inc. and JT4 LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) USAID (US Agency for International Development)	$94,388,067	0.2%	Rank history: not on the FY2021–FY2023 lists and #9 in FY2025; new.
64	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$94,197,464	0.2%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2025; up 160 since FY2023.
65	Atlas Technologies Inc. Top agencies Navy (Department of the Navy)	$93,994,025	0.2%	Rank history: not on the FY2021–FY2023 lists and #61 in FY2025; new.
66	Mayvin, Inc. Top agencies DHS (Department of Homeland Security) DOJ (Department of Justice) Army (Department of the Army)	$93,743,573	0.2%	Rank history: not on the FY2021 list, #64 in FY2022, #62 in FY2023 and #56 in FY2025; down 4 since FY2023.
67	Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$93,311,058	0.2%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
68	Mele Associates Inc. Top agencies DOE (Department of Energy)	$91,936,034	0.2%	Rank history: not on the FY2021 list, #100 in FY2022, #79 in FY2023 and #57 in FY2025; up 11 since FY2023.
69	Johnson Controls Security Solutions LLC 2 awardees, including Johnson Controls Government Systems, LLC Top agencies Army (Department of the Army) GSA (General Services Administration) Navy (Department of the Navy)	$89,817,667	0.2%	Rank history: #96 in FY2021, #59 in FY2022, #72 in FY2023 and not on the FY2025 list; up 3 since FY2023.
70	Valiant Global Defense Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) DTRA (Defense Threat Reduction Agency)	$89,029,827	0.2%	Rank history: not on the FY2021–FY2023 lists and #51 in FY2025; new.
71	Credence Dynamo Solutions LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) DHS (Department of Homeland Security)	$88,950,564	0.2%	Rank history: not on the FY2021–FY2023 lists and #42 in FY2025; up 47 since FY2023.
72	American Systems Corporation Top agencies Navy (Department of the Navy) DHS (Department of Homeland Security) OSD (Office of the Secretary of Defense)	$88,613,112	0.2%	Rank history: #59 in FY2021, #88 in FY2022, #66 in FY2023 and #72 in FY2025; down 6 since FY2023.
73	Ameresco Inc. 3 awardees, including Ameresco Federal Solutions, Inc. and Ameresco Select, Inc. Top agencies Navy (Department of the Navy) VA (Department of Veterans Affairs) USAF (Department of the Air Force)	$86,106,663	0.2%	Rank history: #71 in FY2021, #45 in FY2022, #54 in FY2023 and #17 in FY2025; down 19 since FY2023.
74	Resource Management Concepts, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$84,776,959	0.2%	Rank history: not on the FY2021 list, #96 in FY2022, #70 in FY2023 and #48 in FY2025; down 4 since FY2023.
75	Nova Global Supply and Services LLC Through Valiant Global Defense Services Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy) OSD (Office of the Secretary of Defense)	$82,965,977	0.1%	Rank history: #42 in FY2021, #40 in FY2022, #32 in FY2023 and not on the FY2025 list; down 43 since FY2023.
76	Veritas Capital Fund Management, L.L.C. 2 awardees, including Analex Corporation and Peraton Aerospace & Defense Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) Army (Department of the Army)	$82,925,310	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
77	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)	$81,558,650	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
78	Indus Technology Inc. Top agencies Navy (Department of the Navy)	$79,174,718	0.1%	Rank history: not on the FY2021–FY2022 lists, #77 in FY2023 and #82 in FY2025; down 1 since FY2023.
79	Rite-Solutions, Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$78,791,112	0.1%	Rank history: not on the FY2021–FY2023 lists and #84 in FY2025; up 41 since FY2023.
80	Apogee Engineering, LLC Top agencies USSOCOM (United States Special Operations Command) USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$78,533,640	0.1%	Rank history: #45 in FY2021, #60 in FY2022, not on the FY2023 list and #63 in FY2025; returned.
81	Seacorp, LLC Top agencies Navy (Department of the Navy)	$77,959,041	0.1%	Rank history: not on the FY2021 list, #87 in FY2022, #90 in FY2023 and #74 in FY2025; up 9 since FY2023.
82	HP Enterprise Services LLC 4 awardees, including Peraton Inc. and Peraton Technology Services Inc. Top agencies Army (Department of the Army) NASA (National Aeronautics and Space Administration) Navy (Department of the Navy)	$76,605,648	0.1%	Rank history: #23 in FY2021, #15 in FY2022, #13 in FY2023 and not on the FY2025 list; down 69 since FY2023.
83	Strategic Alliance Solutions LLC Top agencies MDA (DOD Missile Defense Agency)	$74,779,760	0.1%	Rank history: not on the FY2021–FY2023 lists and #67 in FY2025; up 368 since FY2023.
84	Arcadis U.s., Inc. Top agencies IBWC (International Boundary and Water Commission U.S.-Mexico) Army (Department of the Army) EPA (Environmental Protection Agency)	$74,413,989	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
85	Oceanetics Inc. Top agencies Navy (Department of the Navy) DLA (Defense Logistics Agency) USSOCOM (United States Special Operations Command)	$74,217,214	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 116 since FY2023.
86	Spalding Consulting Inc. Top agencies Navy (Department of the Navy)	$73,809,641	0.1%	Rank history: not on the FY2021–FY2023 lists and #76 in FY2025; new.
87	Simventions Inc. Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$73,247,316	0.1%	Rank history: not on the FY2021–FY2022 lists, #92 in FY2023 and #73 in FY2025; up 5 since FY2023.
88	Raytheon Company Top agencies MDA (DOD Missile Defense Agency) Navy (Department of the Navy) Army (Department of the Army)	$71,646,253	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
89	Southwest Range Services LLC Top agencies Army (Department of the Army)	$71,490,315	0.1%	Rank history: #72 in FY2021, #74 in FY2022, #83 in FY2023 and #97 in FY2025; down 6 since FY2023.
90	Jacobs Engineering Group Inc. 15 awardees, including Amentum Technology, Inc., Ch2M Hill, Inc. and Jacobs Government Services Co Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOT (Department of Transportation)	$70,669,805	0.1%	Rank history: #15 in FY2021, #13 in FY2022, #15 in FY2023 and not on the FY2025 list; down 75 since FY2023.
91	DAI Global LLC Top agencies USAID (US Agency for International Development)	$70,485,411	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 115 since FY2023.
92	Leonardo S.p.A. 11 awardees, including DRS Network & Imaging Systems LLC, DRS Advanced Isr, LLC and DRS Training & Control Systems, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$69,631,552	0.1%	Rank history: #53 in FY2021, #54 in FY2022, #42 in FY2023 and not on the FY2025 list; down 50 since FY2023.
93	Tatitlek Corporation Through Tatitlek Technologies, LLC Top agencies OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$69,028,485	0.1%	Rank history: not on the FY2021–FY2022 lists, #67 in FY2023 and not on the FY2025 list; down 26 since FY2023.
94	Mantech Advanced Systems International, Inc. Top agencies Navy (Department of the Navy) DOS (Department of State) Army (Department of the Army)	$68,868,480	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; new.
95	Burns & Mcdonnell, Inc. 3 awardees, including Burns & Mcdonnell Engineering Company, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) DOS (Department of State)	$68,650,925	0.1%	Rank history: #46 in FY2021, #47 in FY2022, #38 in FY2023 and not on the FY2025 list; down 57 since FY2023.
96	Delta Solutions & Strategies LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy)	$65,078,929	0.1%	Rank history: not on the FY2021–FY2023 lists and #88 in FY2025; new.
97	Resolution Consultants - An Aecom-Ensafe Joint Venture Top agencies Navy (Department of the Navy)	$64,237,578	0.1%	Rank history: not on the FY2021–FY2022 lists, #91 in FY2023 and #98 in FY2025; down 6 since FY2023.
98	TRI Star Engineering Inc. Through Tristar, Inc. Top agencies Navy (Department of the Navy)	$63,066,572	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 54 since FY2023.
99	Chickasaw Aerospace, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$61,447,966	0.1%	Rank history: not on the FY2021–FY2023 lists and not on the FY2025 list; up 159 since FY2023.
100	Kbr, Inc. 5 awardees, including KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration) Navy (Department of the Navy) DOT (Department of Transportation)	$60,946,427	0.1%	Rank history: #16 in FY2021, #18 in FY2022, #18 in FY2023 and not on the FY2025 list; down 82 since FY2023.

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 $56.1 billion obligated before deobligations, so they never pass 100%.
• Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
• Fiscal year 2024 ran Oct 1, 2023 – Sep 30, 2024. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
• Rank changes compare with FY2023. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
• Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2023 takes the color of the rank change beside it.
• Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers