Top 100 Contractors in PSC R424: Expert Witness, FY2023

Name: Top 100 Contractors in PSC R424: Expert Witness, FY2023
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

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

The top 10 won 39% of FY2023 PSC R424 contract dollars

Contract obligations: $344,825,637 Net of deobligations, by contracts coded PSC R424
Contractors: 940 Parent companies with an obligation
Largest contractor: Georgia TECH Research Corp $45.4 million, 11.1% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Georgia TECH Research Corp Through Georgia TECH Applied Research Corp Top agencies USAF (Department of the Air Force)	$45,427,452	11.1%	Rank history: #1 in FY2021, #1 in FY2022 and not on the FY2024–FY2025 lists; unchanged since FY2022.
2	CRA International, Inc. Top agencies FTC (Federal Trade Commission) DOJ (Department of Justice) SEC (Securities and Exchange Commission)	$19,329,149	4.7%	Rank history: #4 in FY2021, #6 in FY2022, #7 in FY2024 and #20 in FY2025; up 4 since FY2022.
3	Cornerstone Research Inc. Top agencies DOJ (Department of Justice) Treasury (Department of the Treasury) FTC (Federal Trade Commission)	$18,700,589	4.6%	Rank history: #3 in FY2021, #7 in FY2022, #3 in FY2024 and #14 in FY2025; up 4 since FY2022.
4	HKA Global LLC Through The Kenrich Group, LLC Top agencies Army (Department of the Army)	$14,472,258	3.5%	Rank history: #5 in FY2021, #4 in FY2022, not on the FY2024 list and #46 in FY2025; unchanged since FY2022.
5	The Brattle Group Inc 2 awardees Top agencies DOJ (Department of Justice) Treasury (Department of the Treasury) CFTC (Commodity Futures Trading Commission)	$13,524,253	3.3%	Rank history: #6 in FY2021, #3 in FY2022, #5 in FY2024 and #3 in FY2025; down 2 since FY2022.
6	Bates White, LLC Top agencies DOJ (Department of Justice) FTC (Federal Trade Commission) SEC (Securities and Exchange Commission)	$12,848,880	3.1%	Rank history: #8 in FY2021, #5 in FY2022, #2 in FY2024 and #2 in FY2025; down 1 since FY2022.
7	Analysis Group Inc. Top agencies DOJ (Department of Justice) SEC (Securities and Exchange Commission) CFTC (Commodity Futures Trading Commission)	$11,925,638	2.9%	Rank history: #2 in FY2021, #2 in FY2022, #4 in FY2024 and #6 in FY2025; down 5 since FY2022.
8	Berkeley Research Group, LLC Top agencies DOJ (Department of Justice) FTC (Federal Trade Commission) Treasury (Department of the Treasury)	$10,682,542	2.6%	Rank history: #21 in FY2021, #32 in FY2022, #8 in FY2024 and #7 in FY2025; up 24 since FY2022.
9	FTI Consulting, Inc. 2 awardees, including Compass Lexecon LLC Top agencies SEC (Securities and Exchange Commission) DOJ (Department of Justice) Army (Department of the Army)	$7,327,724	1.8%	Rank history: #7 in FY2021, #11 in FY2022, #6 in FY2024 and #5 in FY2025; up 2 since FY2022.
10	Tmax Government Solutions LLC Top agencies SSA (Social Security Administration) HHS (Department of Health and Human Services)	$6,059,987	1.5%	Rank history: not on the FY2021–FY2022 lists, #10 in FY2024 and #49 in FY2025; new.
11	SRK Consulting (U.S.), Inc. Top agencies Treasury (Department of the Treasury)	$5,585,827	1.4%	Rank history: #74 in FY2021, #19 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
12	Industrial Economics Inc. Top agencies DOJ (Department of Justice)	$4,915,510	1.2%	Rank history: #14 in FY2021, #24 in FY2022, #21 in FY2024 and #42 in FY2025; up 12 since FY2022.
13	Groff Engineering & Consulting PLLC Top agencies Treasury (Department of the Treasury)	$4,190,769	1.0%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 132 since FY2022.
14	Lustig Credit Rating Advisory LLC Top agencies Treasury (Department of the Treasury)	$3,961,436	1.0%	Rank history: not on the FY2021–FY2022 lists, #9 in FY2024 and #38 in FY2025; new.
15	Beacon Group, LLC Top agencies DOJ (Department of Justice) Navy (Department of the Navy) DOT (Department of Transportation)	$3,934,106	1.0%	Rank history: #28 in FY2021, #13 in FY2022, #11 in FY2024 and #27 in FY2025; down 2 since FY2022.
16	Sellers Realty, LLC Top agencies Treasury (Department of the Treasury)	$3,910,623	1.0%	Rank history: not on the FY2021 list, #26 in FY2022, #43 in FY2024 and #23 in FY2025; up 10 since FY2022.
17	J.s. Held LLC Top agencies DOJ (Department of Justice) Navy (Department of the Navy) SEC (Securities and Exchange Commission)	$3,627,572	0.9%	Rank history: #72 in FY2021, #16 in FY2022, #65 in FY2024 and #35 in FY2025; down 1 since FY2022.
18	Integra FEC LLC Top agencies SEC (Securities and Exchange Commission) DOJ (Department of Justice)	$3,271,681	0.8%	Rank history: #18 in FY2021, #21 in FY2022, #20 in FY2024 and #34 in FY2025; up 3 since FY2022.
19	Union Station Venture, Ltd. Through JLL Valuation & Advisory Services, LLC Top agencies Treasury (Department of the Treasury) DOJ (Department of Justice)	$3,176,422	0.8%	Rank history: not on the FY2021 list, #17 in FY2022, #78 in FY2024 and not on the FY2025 list; down 2 since FY2022.
20	Litcon Group LLC 2 awardees Top agencies DOJ (Department of Justice) Army (Department of the Army)	$3,171,464	0.8%	Rank history: #11 in FY2021, #18 in FY2022, #14 in FY2024 and #21 in FY2025; down 2 since FY2022.
21	Morgan, Angel, Brigham & Associates L.L.C. Top agencies DOJ (Department of Justice)	$2,971,691	0.7%	Rank history: #13 in FY2021, #14 in FY2022, #16 in FY2024 and #9 in FY2025; down 7 since FY2022.
22	Marsh & Mclennan Companies Inc. Through National Economic Research Associates Inc. Top agencies Treasury (Department of the Treasury) SEC (Securities and Exchange Commission)	$2,647,941	0.6%	Rank history: not on the FY2021 list, #36 in FY2022, #18 in FY2024 and #15 in FY2025; up 14 since FY2022.
23	Infoedge Technology, Inc. Top agencies DOS (Department of State)	$2,550,000	0.6%	Rank history: #26 in FY2021, #27 in FY2022, #17 in FY2024 and #18 in FY2025; up 4 since FY2022.
24	Intensity LLC Top agencies Treasury (Department of the Treasury)	$2,391,050	0.6%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2024 and not on the FY2025 list; new.
25	Ankura Holdings, LP Through Ankura Consulting Group, LLC Top agencies MDA (DOD Missile Defense Agency) DOJ (Department of Justice) SEC (Securities and Exchange Commission)	$2,362,561	0.6%	Rank history: #53 in FY2021, #41 in FY2022, #58 in FY2024 and not on the FY2025 list; up 16 since FY2022.
26	Gordian Litigation Solutions Group, Inc. Top agencies USAF (Department of the Air Force)	$2,308,995	0.6%	Rank history: #9 in FY2021, #15 in FY2022 and not on the FY2024–FY2025 lists; down 11 since FY2022.
27	ABZ Inc. Top agencies DOJ (Department of Justice)	$2,292,302	0.6%	Rank history: #23 in FY2021, #23 in FY2022, #92 in FY2024 and not on the FY2025 list; down 4 since FY2022.
28	Edgeworth Economics, L.l.c Top agencies Treasury (Department of the Treasury) DOJ (Department of Justice)	$2,267,121	0.6%	Rank history: #85 in FY2021, not on the FY2022 list, #19 in FY2024 and not on the FY2025 list; up 97 since FY2022.
29	Stoneturn Group LLP Top agencies SEC (Securities and Exchange Commission) DOJ (Department of Justice)	$2,120,652	0.5%	Rank history: #66 in FY2021, #47 in FY2022, #68 in FY2024 and not on the FY2025 list; up 18 since FY2022.
30	Complete Discovery Source Inc. Top agencies Army (Department of the Army)	$1,991,470	0.5%	Rank history: not on the FY2021 list, #67 in FY2022 and not on the FY2024–FY2025 lists; up 37 since FY2022.
31	Coherent Economics LLC Top agencies FTC (Federal Trade Commission)	$1,975,000	0.5%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
32	Stagg Resource Consultants, Inc. Top agencies Treasury (Department of the Treasury)	$1,841,352	0.4%	Rank history: not on the FY2021 list, #35 in FY2022, not on the FY2024 list and #19 in FY2025; up 3 since FY2022.
33	Real Estate Valuation Advisors LLC Top agencies Treasury (Department of the Treasury)	$1,759,825	0.4%	Rank history: not on the FY2021–FY2022 lists, #96 in FY2024 and not on the FY2025 list; up 127 since FY2022.
34	Exponent Inc. 2 awardees Top agencies DOJ (Department of Justice)	$1,748,332	0.4%	Rank history: #46 in FY2021, not on the FY2022 list, #82 in FY2024 and not on the FY2025 list; up 243 since FY2022.
35	P.e. Lamoreaux & Associates, Inc. Top agencies Treasury (Department of the Treasury)	$1,729,645	0.4%	Rank history: not on the FY2021–FY2022 lists, #74 in FY2024 and not on the FY2025 list; up 91 since FY2022.
36	Gnss Solutions Ltd Top agencies Army (Department of the Army)	$1,722,079	0.4%	Rank history: #37 in FY2021, #20 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
37	Sikich CPA LLC Top agencies DCMA (Defense Contract Management Agency) Army (Department of the Army)	$1,650,817	0.4%	Rank history: not on the FY2021–FY2022 lists, #23 in FY2024 and #25 in FY2025; up 425 since FY2022.
38	Barber and Mann Inc. Top agencies Treasury (Department of the Treasury)	$1,635,029	0.4%	Rank history: not on the FY2021 list, #33 in FY2022, #32 in FY2024 and #17 in FY2025; down 5 since FY2022.
39	Wright Water Engineers, Inc. Top agencies DOJ (Department of Justice)	$1,556,375	0.4%	Rank history: #44 in FY2021, not on the FY2022 list, #34 in FY2024 and #28 in FY2025; up 360 since FY2022.
40	Keystone Strategy LLC 2 awardees Top agencies DOJ (Department of Justice) FTC (Federal Trade Commission)	$1,482,312	0.4%	Rank history: not on the FY2021 list, #10 in FY2022, #13 in FY2024 and #8 in FY2025; down 30 since FY2022.
41	Gradco LLC Top agencies DOJ (Department of Justice)	$1,438,571	0.4%	Rank history: #68 in FY2021, #54 in FY2022 and not on the FY2024–FY2025 lists; up 13 since FY2022.
42	Capital Project Management, Inc. Top agencies DOJ (Department of Justice) Army (Department of the Army) Navy (Department of the Navy)	$1,437,752	0.4%	Rank history: #27 in FY2021, #65 in FY2022, #27 in FY2024 and #13 in FY2025; up 23 since FY2022.
43	John J. YIM & Associates, LLC Top agencies DHS (Department of Homeland Security)	$1,407,476	0.3%	Rank history: not on the FY2021–FY2022 lists, #35 in FY2024 and #24 in FY2025; new.
44	Utility Credit Consultancy LLC Top agencies Treasury (Department of the Treasury)	$1,381,055	0.3%	Rank history: not on the FY2021–FY2022 lists, #41 in FY2024 and #29 in FY2025; new.
45	Dubinsky Consulting, LLC Top agencies Treasury (Department of the Treasury) DOJ (Department of Justice)	$1,328,182	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
46	Resolution Economics, LLC Top agencies Navy (Department of the Navy) DOJ (Department of Justice)	$1,311,050	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 395 since FY2022.
47	Southwest Research Institute Through Signature Science LLC Top agencies DOJ (Department of Justice)	$1,145,170	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
48	Williams Consulting LLC Top agencies SSA (Social Security Administration)	$1,137,474	0.3%	Rank history: not on the FY2021–FY2022 lists, #48 in FY2024 and #54 in FY2025; new.
49	Global Economics Group, LLC Top agencies FTC (Federal Trade Commission) SEC (Securities and Exchange Commission) Treasury (Department of the Treasury)	$1,121,249	0.3%	Rank history: #31 in FY2021, #92 in FY2022, #57 in FY2024 and #33 in FY2025; up 43 since FY2022.
50	TAC Insurance Consulting, LLC Top agencies Treasury (Department of the Treasury)	$1,108,739	0.3%	Rank history: #91 in FY2021, #51 in FY2022, #45 in FY2024 and not on the FY2025 list; up 1 since FY2022.
51	S.s. Papadopulos & Associates, Inc. Top agencies DOJ (Department of Justice)	$1,105,366	0.3%	Rank history: not on the FY2021–FY2022 lists, #40 in FY2024 and #93 in FY2025; new.
52	Kleinschmidt Associates Top agencies DOJ (Department of Justice)	$1,096,578	0.3%	Rank history: not on the FY2021 list, #60 in FY2022 and not on the FY2024–FY2025 lists; up 8 since FY2022.
53	Stetson Engineers Inc. Top agencies DOJ (Department of Justice) DOI (Department of the Interior)	$1,084,392	0.3%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #87 in FY2025; up 67 since FY2022.
54	Delta Consulting Group Inc. Top agencies Navy (Department of the Navy) DOJ (Department of Justice) VA (Department of Veterans Affairs)	$1,072,068	0.3%	Rank history: #38 in FY2021, #28 in FY2022, #54 in FY2024 and not on the FY2025 list; down 26 since FY2022.
55	Lampl / Herbert Consultants, Inc. Top agencies Treasury (Department of the Treasury)	$1,057,212	0.3%	Rank history: not on the FY2021 list, #34 in FY2022, #28 in FY2024 and not on the FY2025 list; down 21 since FY2022.
56	Park Dietz & Associates, LLC Top agencies DOJ (Department of Justice)	$1,055,152	0.3%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 154 since FY2022.
57	Deloitte LLP 3 awardees, including Deloitte Financial Advisory Services LLP Top agencies DOJ (Department of Justice) DOL (Department of Labor)	$1,053,827	0.3%	Rank history: #32 in FY2021, #37 in FY2022 and not on the FY2024–FY2025 lists; down 20 since FY2022.
58	Environmental Research Incorporated Top agencies DOJ (Department of Justice)	$1,028,479	0.3%	Rank history: not on the FY2021 list, #45 in FY2022, #37 in FY2024 and not on the FY2025 list; down 13 since FY2022.
59	Togiak Management Services, LLC Top agencies Treasury (Department of the Treasury)	$986,000	0.2%	Rank history: not on the FY2021 list, #46 in FY2022, not on the FY2024 list and #56 in FY2025; down 13 since FY2022.
60	Stout Risius Ross, LLC Top agencies DOJ (Department of Justice) FTC (Federal Trade Commission) HHS (Department of Health and Human Services)	$980,240	0.2%	Rank history: #24 in FY2021, #44 in FY2022, #46 in FY2024 and #30 in FY2025; down 16 since FY2022.
61	Wolf Water Resources Inc. Top agencies DOJ (Department of Justice)	$934,710	0.2%	Rank history: #16 in FY2021, #49 in FY2022, #89 in FY2024 and not on the FY2025 list; down 12 since FY2022.
62	Aufrance Valuations, LLC Top agencies DOJ (Department of Justice)	$925,000	0.2%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #55 in FY2025; up 249 since FY2022.
63	Core Legal Concepts, LLC Top agencies DOJ (Department of Justice)	$882,736	0.2%	Rank history: not on the FY2021–FY2022 lists, #63 in FY2024 and #64 in FY2025; up 385 since FY2022.
64	Accenture Inc. Through Accenture Federal Services LLC Top agencies CFTC (Commodity Futures Trading Commission)	$875,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
65	GRA Inc. Top agencies DOJ (Department of Justice)	$837,287	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
66	Natural Resources Consulting Engineers, Inc. Top agencies DOJ (Department of Justice)	$821,448	0.2%	Rank history: #41 in FY2021, #90 in FY2022, #31 in FY2024 and #45 in FY2025; up 24 since FY2022.
67	Chess Consulting LLC Top agencies DOJ (Department of Justice)	$805,471	0.2%	Rank history: #65 in FY2021, #63 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
68	ZAC Ryan Appraisal Services Inc Top agencies Treasury (Department of the Treasury)	$794,238	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
69	Talas Engineering, Inc. Top agencies DOJ (Department of Justice)	$789,184	0.2%	Rank history: not on the FY2021–FY2022 lists, #76 in FY2024 and not on the FY2025 list; up 63 since FY2022.
70	Secretariat Economists LLC Top agencies DOJ (Department of Justice)	$788,081	0.2%	Rank history: #34 in FY2021, #29 in FY2022, #15 in FY2024 and not on the FY2025 list; down 41 since FY2022.
71	United Expert Holdings LLC Top agencies Treasury (Department of the Treasury) SEC (Securities and Exchange Commission)	$777,803	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; up 342 since FY2022.
72	Russell, David T Top agencies Treasury (Department of the Treasury)	$750,692	0.2%	Rank history: not on the FY2021 list, #68 in FY2022 and not on the FY2024–FY2025 lists; down 4 since FY2022.
73	JAB Innovative Solutions LLC Top agencies DOL (Department of Labor)	$718,597	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
74	MTC Consulting LLC Top agencies Treasury (Department of the Treasury)	$710,325	0.2%	Rank history: not on the FY2021 list, #62 in FY2022 and not on the FY2024–FY2025 lists; down 12 since FY2022.
75	Rimkus Consulting Group, Inc. 2 awardees, including Rimkus Analytics, L.L.C. Top agencies DOJ (Department of Justice) MDA (DOD Missile Defense Agency) Army (Department of the Army)	$660,962	0.2%	Rank history: not on the FY2021 list, #79 in FY2022, #94 in FY2024 and not on the FY2025 list; up 4 since FY2022.
76	Driggers Commercial Group, Inc. Top agencies Treasury (Department of the Treasury)	$660,177	0.2%	Rank history: not on the FY2021 list, #94 in FY2022, not on the FY2024 list and #61 in FY2025; up 18 since FY2022.
77	Madison Consulting Group, Inc. Top agencies Treasury (Department of the Treasury)	$650,298	0.2%	Rank history: #56 in FY2021, #43 in FY2022 and not on the FY2024–FY2025 lists; down 34 since FY2022.
78	Tankersley Michael Top agencies Treasury (Department of the Treasury)	$647,871	0.2%	Rank history: not on the FY2021 list, #84 in FY2022, not on the FY2024 list and #36 in FY2025; up 6 since FY2022.
79	Financial Reporting Advisors, LLC Top agencies SEC (Securities and Exchange Commission)	$620,000	0.2%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
80	Hemming Morse, LLC Top agencies SEC (Securities and Exchange Commission) Treasury (Department of the Treasury)	$619,452	0.2%	Rank history: not on the FY2021 list, #50 in FY2022, not on the FY2024 list and #59 in FY2025; down 30 since FY2022.
81	James J Angel Top agencies SEC (Securities and Exchange Commission)	$618,500	0.2%	Rank history: #69 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.
82	James Tyler Leverty Top agencies Treasury (Department of the Treasury)	$608,680	0.1%	Rank history: not on the FY2021–FY2022 lists, #60 in FY2024 and #79 in FY2025; new.
83	The Scruggs Group, Inc. Top agencies Treasury (Department of the Treasury)	$600,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
84	Pritchett Ball & Wise Inc. Top agencies Treasury (Department of the Treasury)	$582,522	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
85	Taylor & Mulder Inc Top agencies Treasury (Department of the Treasury)	$580,485	0.1%	Rank history: not on the FY2021–FY2022 lists, #52 in FY2024 and #82 in FY2025; new.
86	Reaction Engineering International Top agencies DOJ (Department of Justice)	$541,380	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
87	American Medical Experts, LLC Top agencies DOJ (Department of Justice)	$540,400	0.1%	Rank history: #77 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 28 since FY2022.
88	Eckles David L Top agencies Treasury (Department of the Treasury)	$540,212	0.1%	Rank history: #93 in FY2021, not on the FY2022 list, #29 in FY2024 and #58 in FY2025; returned.
89	PG Environmental, LLC Top agencies DOJ (Department of Justice)	$532,347	0.1%	Rank history: not on the FY2021 list, #73 in FY2022 and not on the FY2024–FY2025 lists; down 16 since FY2022.
90	J29, Inc. Top agencies HHS (Department of Health and Human Services)	$520,648	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
91	Hyperanalytic Inc. Top agencies FTC (Federal Trade Commission)	$500,000	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
92	Cliftonlarsonallen LLP Top agencies DOJ (Department of Justice)	$500,000	0.1%	Rank history: not on the FY2021–FY2022 lists, not on the FY2024 list and #22 in FY2025; new.
93	Sonoma Technology, Inc. Top agencies DOJ (Department of Justice)	$499,765	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
94	TWS Expert Witness, LLC Top agencies DOJ (Department of Justice)	$498,408	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
95	Marcum LLP Top agencies SEC (Securities and Exchange Commission)	$497,875	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
96	Mclane Environmental, LLC Top agencies DOJ (Department of Justice)	$497,530	0.1%	Rank history: #49 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; up 20 since FY2022.
97	West Consultants Inc. Top agencies DOJ (Department of Justice)	$497,153	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
98	Evans Water Resources Engineering PLLC Top agencies DOJ (Department of Justice)	$493,120	0.1%	Rank history: #48 in FY2021, #56 in FY2022, not on the FY2024 list and #75 in FY2025; down 42 since FY2022.
99	Halff Associates Inc. Top agencies DOJ (Department of Justice)	$492,880	0.1%	Rank history: not on the FY2021–FY2022 lists and not on the FY2024–FY2025 lists; new.
100	Chelsea-Village Medical Office, P.C. Top agencies DOJ (Department of Justice)	$492,112	0.1%	Rank history: #50 in FY2021, not on the FY2022 list and not on the FY2024–FY2025 lists; returned.

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100 of 940 contractors listed here. See the rest on GovTribe.

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 $410 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 R424 contractors in FY2023?

1. Georgia TECH Research Corp ($45.4M), 2. CRA International, Inc. ($19.3M), 3. Cornerstone Research Inc. ($18.7M), 4. HKA Global LLC ($14.5M), 5. The Brattle Group Inc ($13.5M), 6. Bates White, LLC ($12.8M), 7. Analysis Group Inc. ($11.9M), 8. Berkeley Research Group, LLC ($10.7M), 9. FTI Consulting, Inc. ($7.33M), 10. Tmax Government Solutions LLC ($6.06M).

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