Top 100 Contractors in PSC AS: Transportation R&D Services, FY2023

Name: Top 100 Contractors in PSC AS: Transportation R&D Services, FY2023
Creator: GovTribe

Parent companies by net contract obligations Oct 1, 2022 – Sep 30, 2023 Code page on GovTribe

The top 10 won 63% of FY2023 PSC AS contract dollars

Contract obligations: $350,442,550 Net of deobligations, by contracts coded PSC AS or a code under it
Contractors: 162 Parent companies with an obligation
Largest contractor: General Electric Company $44.7 million, 12.6% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	General Electric Company Top agencies NASA (National Aeronautics and Space Administration)	$44,692,965	12.6%	Rank history: #1 in FY2021, #1 in FY2022, #1 in FY2024 and #1 in FY2025; unchanged since FY2022.
2	RTX Corporation 4 awardees, including Raytheon Company Top agencies DOT (Department of Transportation) NASA (National Aeronautics and Space Administration)	$43,612,000	12.3%	Rank history: #12 in FY2021, #7 in FY2022, #2 in FY2024 and #2 in FY2025; up 5 since FY2022.
3	Magnix USA Inc. Top agencies NASA (National Aeronautics and Space Administration)	$25,592,435	7.2%	Rank history: #7 in FY2021, #3 in FY2022, #5 in FY2024 and not on the FY2025 list; unchanged since FY2022.
4	Ensco Inc. Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security)	$21,097,749	6.0%	Rank history: #20 in FY2021, #12 in FY2022, #6 in FY2024 and #6 in FY2025; up 8 since FY2022.
5	Lockheed Martin Corporation 2 awardees, including Lockheed Martin Services, LLC Top agencies DOT (Department of Transportation)	$17,327,343	4.9%	Rank history: #2 in FY2021, #2 in FY2022, #13 in FY2024 and #3 in FY2025; down 3 since FY2022.
6	Noblis, Inc. Top agencies DOT (Department of Transportation)	$16,209,955	4.6%	Rank history: #45 in FY2021, #6 in FY2022, #3 in FY2024 and #4 in FY2025; unchanged since FY2022.
7	Transportation Research Center Inc. Top agencies DOT (Department of Transportation)	$15,741,548	4.4%	Rank history: #6 in FY2021, #11 in FY2022, not on the FY2024 list and #24 in FY2025; up 4 since FY2022.
8	Leidos Holdings, Inc. 2 awardees, including Leidos, Inc. Top agencies DOT (Department of Transportation)	$15,009,865	4.2%	Rank history: #5 in FY2021, #4 in FY2022, #4 in FY2024 and #5 in FY2025; down 4 since FY2022.
9	Genex Systems, LLC Top agencies DOT (Department of Transportation)	$12,333,065	3.5%	Rank history: #31 in FY2021, #16 in FY2022, #9 in FY2024 and #7 in FY2025; up 7 since FY2022.
10	Virginia Commonwealth University Through Virginia Polytechnic Institute & State University Top agencies DOT (Department of Transportation)	$10,249,826	2.9%	Rank history: not on the FY2021–FY2022 lists, #8 in FY2024 and #30 in FY2025; new.
11	US Ecology, Inc. Through Boom Technology, Inc. Top agencies USAF (Department of the Air Force)	$9,634,000	2.7%	Rank history: not on the FY2021 list, #10 in FY2022 and not on the FY2024–FY2025 lists; down 1 since FY2022.
12	Pacific Layberthing South, LLC Top agencies DOT (Department of Transportation)	$9,335,336	2.6%	Rank history: not on the FY2021 list, #5 in FY2022, #10 in FY2024 and #8 in FY2025; down 7 since FY2022.
13	Diakon Solutions LLC Top agencies DOT (Department of Transportation)	$6,186,500	1.7%	Rank history: not on the FY2021 list, #56 in FY2022, #11 in FY2024 and #11 in FY2025; up 43 since FY2022.
14	ICF International, Inc. Through ICF Incorporated, L.L.C. Top agencies DOT (Department of Transportation)	$5,569,394	1.6%	Rank history: #16 in FY2021, #18 in FY2022, #29 in FY2024 and not on the FY2025 list; up 4 since FY2022.
15	Dynamic Research Inc. Top agencies DOT (Department of Transportation)	$5,130,785	1.4%	Rank history: not on the FY2021 list, #32 in FY2022 and not on the FY2024–FY2025 lists; up 17 since FY2022.
16	Micro-X Inc. Top agencies DHS (Department of Homeland Security)	$4,882,489	1.4%	Rank history: #13 in FY2021, #23 in FY2022, #62 in FY2024 and #10 in FY2025; up 7 since FY2022.
17	Battelle Memorial Institute Top agencies DOT (Department of Transportation)	$4,842,920	1.4%	Rank history: #44 in FY2021, #14 in FY2022, #15 in FY2024 and #21 in FY2025; down 3 since FY2022.
18	HP Enterprise Services LLC Through Peraton Inc. Top agencies Army (Department of the Army)	$4,778,570	1.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
19	Highway Technology Partners LLC Top agencies DOT (Department of Transportation)	$4,315,787	1.2%	Rank history: #10 in FY2021, #21 in FY2022, #33 in FY2024 and #74 in FY2025; up 2 since FY2022.
20	Iveco SUD-West Nutzfahrzeuge GMBH Through Ati, Inc. Top agencies DOT (Department of Transportation)	$2,930,608	0.8%	Rank history: not on the FY2021 list, #25 in FY2022 and not on the FY2024–FY2025 lists; up 5 since FY2022.
21	George Mason University Top agencies DOT (Department of Transportation)	$2,876,089	0.8%	Rank history: #14 in FY2021, #30 in FY2022 and not on the FY2024–FY2025 lists; up 9 since FY2022.
22	Westat, Inc. Top agencies DOT (Department of Transportation)	$2,817,931	0.8%	Rank history: #48 in FY2021, #42 in FY2022 and not on the FY2024–FY2025 lists; up 20 since FY2022.
23	Tetra Tech, Inc. Through Tetra TECH ES, Inc. Top agencies USAID (US Agency for International Development)	$2,575,176	0.7%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
24	Northrop Grumman Corporation Through Northrop Grumman Systems Corporation Top agencies NASA (National Aeronautics and Space Administration)	$2,499,754	0.7%	Rank history: not on the FY2021–FY2022 lists, #87 in FY2024 and not on the FY2025 list; new.
25	National Academy of Sciences Top agencies DOT (Department of Transportation)	$2,300,432	0.6%	Rank history: #54 in FY2021, not on the FY2022 list, #20 in FY2024 and #17 in FY2025; returned.
26	The Boeing Company Top agencies NASA (National Aeronautics and Space Administration)	$2,234,269	0.6%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
27	Sharma & Associates Inc. Top agencies DOT (Department of Transportation)	$1,939,338	0.5%	Rank history: #11 in FY2021, #27 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
28	Regents of the University of Michigan Top agencies DOT (Department of Transportation)	$1,899,874	0.5%	Rank history: not on the FY2021 list, #15 in FY2022, #50 in FY2024 and #43 in FY2025; down 13 since FY2022.
29	Vanasse Hangen Brustlin, Inc. Top agencies DOT (Department of Transportation)	$1,807,864	0.5%	Rank history: #74 in FY2021, #24 in FY2022, #14 in FY2024 and #16 in FY2025; down 5 since FY2022.
30	Stantec Inc. Through Stantec Consulting Services Inc. Top agencies DOT (Department of Transportation)	$1,793,619	0.5%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #23 in FY2025; new.
31	WSP USA Solutions Inc. Top agencies DOT (Department of Transportation)	$1,791,243	0.5%	Rank history: not on the FY2021 list, #33 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
32	University System of Maryland Through University of Maryland, College Park Top agencies DOT (Department of Transportation)	$1,721,095	0.5%	Rank history: not on the FY2021 list, #93 in FY2022, #72 in FY2024 and not on the FY2025 list; up 61 since FY2022.
33	Engineering & Software Consultants, LLC Top agencies DOT (Department of Transportation)	$1,616,670	0.5%	Rank history: #19 in FY2021, #46 in FY2022, #17 in FY2024 and #32 in FY2025; up 13 since FY2022.
34	Mosaic Atm, Inc. Top agencies DOT (Department of Transportation)	$1,594,240	0.4%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #95 in FY2025; new.
35	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies DOT (Department of Transportation)	$1,473,334	0.4%	Rank history: not on the FY2021 list, #22 in FY2022, #21 in FY2024 and #15 in FY2025; down 13 since FY2022.
36	Uavionix Corp Top agencies DOT (Department of Transportation)	$1,472,841	0.4%	Rank history: not on the FY2021 list, #47 in FY2022 and not on the FY2024–FY2025 lists; up 11 since FY2022.
37	The Texas A&M University System Through Texas A&M Transportation Institute Top agencies DOT (Department of Transportation)	$1,208,461	0.3%	Rank history: not on the FY2021 list, #17 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
38	Scientific Applications & Research Associates, Inc. Top agencies DOT (Department of Transportation) DHS (Department of Homeland Security)	$1,181,703	0.3%	Rank history: #47 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
39	Intelligent Transportation Society of America (Its America) Top agencies DOT (Department of Transportation)	$1,087,587	0.3%	Rank history: #34 in FY2021, #52 in FY2022, #81 in FY2024 and #28 in FY2025; up 13 since FY2022.
40	The Cadmus Group LLC Top agencies DOT (Department of Transportation)	$1,030,305	0.3%	Rank history: #62 in FY2021, #51 in FY2022, #41 in FY2024 and not on the FY2025 list; up 11 since FY2022.
41	Oceanit Laboratories Inc. Top agencies DOT (Department of Transportation)	$1,011,998	0.3%	Rank history: #84 in FY2021, not on the FY2022 list, #91 in FY2024 and not on the FY2025 list; up 68 since FY2022.
42	Intellisense Systems Inc Top agencies DOT (Department of Transportation)	$999,990	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 69 since FY2022.
43	Sciperio Inc. Top agencies DOT (Department of Transportation)	$999,940	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 69 since FY2022.
44	Adelphi Technology Inc. Top agencies DOT (Department of Transportation)	$997,093	0.3%	Rank history: not on the FY2021 list, #95 in FY2022 and not on the FY2024–FY2025 lists; up 51 since FY2022.
45	Applied Pavement Technology, Inc. Top agencies DOT (Department of Transportation)	$995,042	0.3%	Rank history: not on the FY2021 list, #29 in FY2022, #32 in FY2024 and not on the FY2025 list; down 16 since FY2022.
46	FBS Inc. Top agencies DOT (Department of Transportation)	$991,836	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
47	Diplomat Freight Services, LLC Top agencies USAID (US Agency for International Development)	$987,445	0.3%	Rank history: #60 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
48	Resilienx, Inc. Top agencies DOT (Department of Transportation)	$931,726	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
49	Tempest Droneworx, Inc. Top agencies DOT (Department of Transportation)	$925,512	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
50	American Aerospace Technologies, Inc. Top agencies DOT (Department of Transportation)	$861,893	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
51	Exponent Inc. Top agencies DOT (Department of Transportation)	$849,626	0.2%	Rank history: #61 in FY2021, not on the FY2022 list, #25 in FY2024 and not on the FY2025 list; returned.
52	Lighthouse Avionics Inc. Top agencies DOT (Department of Transportation)	$793,420	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
53	SES Group & Associates, LLC Top agencies DOT (Department of Transportation)	$755,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #55 in FY2024 and #55 in FY2025; new.
54	Securboration, Inc. Top agencies USAF (Department of the Air Force)	$736,257	0.2%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2024 and #77 in FY2025; new.
55	Triton Systems, Inc. Top agencies Navy (Department of the Navy) DOT (Department of Transportation)	$696,435	0.2%	Rank history: #41 in FY2021, not on the FY2022 list, #43 in FY2024 and not on the FY2025 list; returned.
56	The CNA Corporation Top agencies DOT (Department of Transportation)	$695,768	0.2%	Rank history: not on the FY2021–FY2022 lists, #54 in FY2024 and not on the FY2025 list; new.
57	AECOM Through AECOM Technical Services, Inc. Top agencies DOT (Department of Transportation)	$664,035	0.2%	Rank history: not on the FY2021 list, #85 in FY2022 and not on the FY2024–FY2025 lists; up 28 since FY2022.
58	Aiwaysion Inc. Top agencies DOT (Department of Transportation)	$647,326	0.2%	Rank history: not on the FY2021–FY2022 lists, #59 in FY2024 and #93 in FY2025; up 59 since FY2022.
59	Applied Research Associates, Inc. Top agencies DOT (Department of Transportation)	$603,136	0.2%	Rank history: #50 in FY2021, #45 in FY2022, not on the FY2024 list and #33 in FY2025; down 14 since FY2022.
60	Toxcel LLC Top agencies DOT (Department of Transportation)	$573,206	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
61	Schatz Publishing Group, LLC Top agencies DOT (Department of Transportation)	$570,000	0.2%	Rank history: not on the FY2021 list, #70 in FY2022, #63 in FY2024 and #65 in FY2025; up 9 since FY2022.
62	Washington Metropolitan Area Transit Authority Top agencies USAGM (US Agency for Global Media)	$554,035	0.2%	Rank history: not on the FY2021 list, #59 in FY2022, #74 in FY2024 and #61 in FY2025; down 3 since FY2022.
63	University of South Carolina Top agencies DOT (Department of Transportation)	$532,489	0.2%	Rank history: #52 in FY2021, #57 in FY2022 and not on the FY2024–FY2025 lists; down 6 since FY2022.
64	American Association for the Advancement of Science Top agencies DOT (Department of Transportation)	$505,774	0.1%	Rank history: not on the FY2021–FY2022 lists, #85 in FY2024 and not on the FY2025 list; new.
65	Michigan Technological University Top agencies DOT (Department of Transportation)	$501,125	0.1%	Rank history: #53 in FY2021, #73 in FY2022, #86 in FY2024 and not on the FY2025 list; up 8 since FY2022.
66	Thermadynamics Rail LLC Top agencies DOT (Department of Transportation)	$500,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
67	Wiss, Janney, Elstner Associates, Inc. Top agencies DOT (Department of Transportation)	$498,504	0.1%	Rank history: not on the FY2021–FY2022 lists, #64 in FY2024 and #53 in FY2025; new.
68	Carnegie-Mellon University 2 awardees Top agencies DOT (Department of Transportation)	$498,476	0.1%	Rank history: #58 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
69	University of Illinois 2 awardees Top agencies DOT (Department of Transportation)	$490,000	0.1%	Rank history: #21 in FY2021, #38 in FY2022, #61 in FY2024 and not on the FY2025 list; down 31 since FY2022.
70	Weris, Inc. Top agencies DOT (Department of Transportation)	$479,564	0.1%	Rank history: not on the FY2021 list, #67 in FY2022, not on the FY2024 list and #58 in FY2025; down 3 since FY2022.
71	American Short Line & Regional Railroad Association Top agencies DOT (Department of Transportation)	$476,368	0.1%	Rank history: not on the FY2021 list, #84 in FY2022 and not on the FY2024–FY2025 lists; up 13 since FY2022.
72	M4 Engineering, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$449,990	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
73	Splusm LLC Top agencies DOT (Department of Transportation)	$424,926	0.1%	Rank history: not on the FY2021 list, #98 in FY2022 and not on the FY2024–FY2025 lists; up 25 since FY2022.
74	Kea Technologies Inc. Top agencies DOT (Department of Transportation)	$424,747	0.1%	Rank history: #66 in FY2021, #55 in FY2022 and not on the FY2024–FY2025 lists; down 19 since FY2022.
75	Tranalytics, LLC Top agencies DOT (Department of Transportation)	$423,613	0.1%	Rank history: not on the FY2021 list, #100 in FY2022, not on the FY2024 list and #88 in FY2025; up 25 since FY2022.
76	Right Click Solutions Inc. Top agencies DOT (Department of Transportation)	$422,474	0.1%	Rank history: not on the FY2021 list, #97 in FY2022 and not on the FY2024–FY2025 lists; up 21 since FY2022.
77	Regents Tennessee Board of 3 awardees, including University of Memphis, University of Tennessee and Tennessee State University Top agencies DOT (Department of Transportation)	$421,641	0.1%	Rank history: not on the FY2021 list, #79 in FY2022 and not on the FY2024–FY2025 lists; up 2 since FY2022.
78	Monterey Technologies Inc. Top agencies DOT (Department of Transportation)	$375,387	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 23 since FY2022.
79	T. White Parker Associates, Incorporated Top agencies DOT (Department of Transportation)	$354,569	0.1%	Rank history: #23 in FY2021, #26 in FY2022 and not on the FY2024–FY2025 lists; down 53 since FY2022.
80	TDA Research, Inc. Top agencies DOT (Department of Transportation)	$349,998	0.1%	Rank history: not on the FY2021–FY2022 lists, #28 in FY2024 and not on the FY2025 list; new.
81	Clemson University Top agencies Army (Department of the Army)	$344,658	0.1%	Rank history: #88 in FY2021, #76 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
82	Federal Mission Solutions, LLC Top agencies DOT (Department of Transportation)	$321,323	0.1%	Rank history: #89 in FY2021, not on the FY2022 list, #96 in FY2024 and not on the FY2025 list; returned.
83	University of Texas System Through University of Texas At Austin Top agencies DOT (Department of Transportation)	$315,088	0.1%	Rank history: #99 in FY2021, #91 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
84	Insi Cloud Inc Top agencies HHS (Department of Health and Human Services)	$304,075	0.1%	Rank history: not on the FY2021–FY2022 lists, #88 in FY2024 and #66 in FY2025; new.
85	Rutgers, the State University Top agencies DOT (Department of Transportation)	$300,304	0.1%	Rank history: #15 in FY2021, #82 in FY2022 and not on the FY2024–FY2025 lists; down 3 since FY2022.
86	Westinghouse Air Brake Technologies Corp Top agencies DOT (Department of Transportation)	$300,000	0.1%	Rank history: not on the FY2021 list, #60 in FY2022 and not on the FY2024–FY2025 lists; down 26 since FY2022.
87	Hdr, Inc. 2 awardees, including HDR Engineering Inc. Top agencies DOT (Department of Transportation)	$270,586	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 55 since FY2022.
88	Oklahoma State University Top agencies DOT (Department of Transportation)	$269,170	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 16 since FY2022.
89	State of California Controllers Office 2 awardees, including The Regents of the University of California Top agencies DOT (Department of Transportation)	$249,998	0.1%	Rank history: #97 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
90	Assured Information Security, Inc. Top agencies DOT (Department of Transportation)	$249,995	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
91	Louis Berger U.S. Inc. Through WSP USA Inc. Top agencies DOT (Department of Transportation)	$246,000	0.1%	Rank history: #17 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
92	Arkansas University Of Through University of Arkansas Top agencies DOT (Department of Transportation)	$243,168	0.1%	Rank history: not on the FY2021 list, #87 in FY2022 and not on the FY2024–FY2025 lists; down 5 since FY2022.
93	Thornton Tomasetti, Inc. Top agencies DOT (Department of Transportation)	$236,718	0.1%	Rank history: not on the FY2021 list, #89 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
94	Tier 1 Performance Solutions LLC Top agencies DOT (Department of Transportation)	$214,310	0.1%	Rank history: not on the FY2021 list, #74 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
95	United Parcel Service Inc. Top agencies CNCS (Corporation for National and Community Service) EEOC (Equal Employment Opportunity Commission)	$213,851	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 62 since FY2022.
96	The Trustees of Columbia University In the City of New York Top agencies DOT (Department of Transportation)	$205,311	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
97	Newport Sensors Inc Top agencies DOT (Department of Transportation)	$200,000	0.1%	Rank history: not on the FY2021–FY2022 lists, #31 in FY2024 and not on the FY2025 list; new.
98	The Mitre Corporation Top agencies NASA (National Aeronautics and Space Administration)	$200,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
99	Aries Science & Technology LLC Top agencies DOT (Department of Transportation)	$199,997	0.1%	Rank history: not on the FY2021–FY2022 lists, #42 in FY2024 and not on the FY2025 list; new.
100	GEI Consultants Inc. Top agencies DOT (Department of Transportation)	$195,558	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.

Show 75 more

100 of 162 contractors listed here. See the rest on GovTribe.

Rankings for the codes under PSC AS

Code	Net obligations	Largest contractor
AS11 Transportation R&D Services; Surface Transportation, Public Transit, and Rail; Basic Research	$106,953,433	Noblis, Inc.
AS12 Transportation R&D Services; Surface Transportation, Public Transit, and Rail; Applied Research	$59,671,033	Transportation Research Center Inc.

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 $354 million obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. 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.

Quick answers

Who were the top 10 PSC AS contractors in FY2023?

1. General Electric Company ($44.7M), 2. RTX Corporation ($43.6M), 3. Magnix USA Inc. ($25.6M), 4. Ensco Inc. ($21.1M), 5. Lockheed Martin Corporation ($17.3M), 6. Noblis, Inc. ($16.2M), 7. Transportation Research Center Inc. ($15.7M), 8. Leidos Holdings, Inc. ($15M), 9. Genex Systems, LLC ($12.3M), 10. Virginia Commonwealth University ($10.2M).

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