PSC code
SUPPORT- PROFESSIONAL: EXPERT WITNESS
- PSC code
- R424
- Latest action
- Sep 22, 2026
- p10
- $15,170
- p25
- $37,660
- p75
- $202,427
- p90
- $291,448
Largest awards under this code
| Award | Contractor | Agency | Place | First action | Current value |
|---|---|---|---|---|---|
| SAQMMA11L1258 THE PURPOSE OF THE MODIFICATION IS IN SUPPORT OF THE LITIGATION SUPPORT SERVICES. | INFOEDGE TECHNOLOGY, INC. | Department of State | VA | Jun 28, 2011 | $28,579,870 |
| 29FTC123C0032 EXPERT SERVICES | BERKELEY RESEARCH GROUP, LLC | Federal Trade Commission | DC | Apr 12, 2023 | $12,347,480 |
| 15JC1V22P00000546 EXPERT WITNESS | GRADCO LLC | Department of Justice | MA | Aug 17, 2022 | $7,822,474 |
| 15JENR18P00000290 EXPERT WITNESS SERVICES | CACI, LLC - COMMERCIAL | Department of Justice | VA | Apr 14, 2026 | $7,308,434 |
| 29FTC126C0044 ECONOMIC CONSULTING SERVICES | BATES WHITE, LLC | Federal Trade Commission | DC | Sep 18, 2026 | $7,211,000 |
| 15JATR23C00000074 EXPERT WITNESS SERVICES | SECRETARIAT ECONOMISTS LLC | Department of Justice | DC | Jun 2, 2026 | $6,145,777 |
| 15JC1V23P00000138 EXPERT WITNESS SERVICES | KEYSTONE STRATEGY LLC | Department of Justice | MA | Dec 23, 2022 | $6,020,847 |
| 29FTC123C0006 EXPERT SERVICES | BERKELEY RESEARCH GROUP, LLC | Federal Trade Commission | CA | Nov 9, 2022 | $6,002,579 |
| 15JENR22P00000144 EXPERT WITNESS | ANALYSIS GROUP INC | Department of Justice | MA | May 18, 2026 | $5,489,500 |
| 2023H223C00015 EXPERT WITNESS SERVICES | EDGEWORTH ECONOMICS, L.L.C | Department of the Treasury | DC | Mar 31, 2023 | $4,750,951 |
| 2023H225C00111 EXPERT WITNESS SERVICES - TRACS0003891 - APPROVED 7/31/2025 - MICROCAPTIVE INSURANCE, FOR INTERNAL REVENUE SERVICE CHIEF COUNSEL. | FTI CONSULTING, INC. | Department of the Treasury | DC | Aug 6, 2025 | $4,684,000 |
| 70RSAT23C00000049 PATENT AGENT AND TRADEMARK AGENT INTELLECTUAL PROPERTY (IP) LEGAL SUPPORT SERVICES | JOHN J. YIM & ASSOCIATES, LLC | Department of Homeland Security | VA | Sep 26, 2023 | $4,319,431 |
| 2023H226C00012 EXPERT WITNESS SERVICES REQUIRED FOR LITIGATION OF CASE BY INTERNAL REVENUE SERVICE CHIEF COUNSEL. THE PURPOSE OF THIS MODIFICATION IS TO EXERCISE PHASES III, IV AND V, AND TO ADD ADDITIONAL DOCKETS. | RUSSELL, DAVID T | Department of the Treasury | CA | Jun 4, 2026 | $4,281,200 |
| 15JC1V23P00000016 EXPERT WITNESS SERVICES | BATES WHITE, LLC | Department of Justice | DC | Oct 21, 2022 | $4,123,243 |
| 15JC1V23P00000160 EXPERT WITNESS SERVICES | BERKELEY RESEARCH GROUP, LLC | Department of Justice | CA | Jan 10, 2023 | $3,999,635 |
| 15JTAX22P00000008 EXPERT WITNESS | BATES WHITE, LLC | Department of Justice | DC | Mar 13, 2026 | $3,945,067 |
| 2023H225C00066 EXPERT WITNESS SERVICES FOR SOFTWARE DESIGN AND OTHER RELATED EXPERT SERVICES. TRACS0002118, APPROVED 6/13/25 | EUREKA SOFTWARE SOLUTIONS INC | Department of the Treasury | TX | Jun 17, 2025 | $3,926,955 |
| 2023H223C00070 EXPERT WITNESS SERVICES. MODIFICATION INCORPORATES RFO FAR 52.222-90 TO SUPPORT IMPLEMENTATION OF THE EXECUTIVE ORDER 14398. | LUSTIG CREDIT RATING ADVISORY LLC | Department of the Treasury | IL | Jul 21, 2026 | $3,924,957 |
| 15JENR21P00000264 EXPERT WITNESS | HISTORICAL RESEARCH ASSOCIATES, INC. | Department of Justice | MT | Mar 31, 2026 | $3,881,556 |
| 2023H225C00043 EXPERT WITNESS SERVICES - INTERNATIONAL ECONOMICS IRS80 - APPROVAL DATE 4/3/2025 | CORNERSTONE RESEARCH INC | Department of the Treasury | GA | Apr 22, 2025 | $3,706,459 |
| 29FTC123C0004 EXPERT SERVICES | GLOBAL ECONOMICS GROUP, LLC | Federal Trade Commission | IL | Apr 14, 2026 | $3,553,104 |
| 2023H225C00044 EXPERT WITNESS SERVICES | BATES WHITE, LLC | Department of the Treasury | DC | Apr 17, 2025 | $3,534,777 |
| 15JC1V21P00000243 EXPERT WITNESS SERVICES | ANALYSIS GROUP INC | Department of Justice | MA | Jun 11, 2026 | $3,494,314 |
| 2023H226C00029 EXPERT WITNESS SERVICES - CONSERVATION EASEMENT | BENSON PHD PE CRAIG H | Department of the Treasury | WI | Jun 30, 2026 | $3,407,012 |
| 2091JB24C00029 EXPERT WITNESS SERVICES: IRS EXPERT WITNESSES THAT IS CAPABLE OF PROVIDING LITIGATION SUPPORT FOR CASES INVOLVING IRS AUDIT DEFENSE, PERFORM FORENSIC ACCOUNTING SERVICES, AND/OR ASSIST IN TAX ABATEMENT. | BATES WHITE, LLC | Department of the Treasury | DC | Sep 10, 2024 | $3,394,371 |
Related records
Derived from awards these records share, ordered by how many.
Benchmarked as
Bought by
Performed in
- California295
- District of Columbia272
- Texas238
- Massachusetts223
- Georgia189
- New York174
- Virginia163
- Florida149
Sources and method
Figures on this page are computed from public federal award records. Numbers are never estimated or generated; where a figure is withheld, the reason is stated rather than filled in.
Totals cover awards where the government recorded this PSC code. Codes are taken as reported; awards are never reclassified into a different code.
- 1Awards are grouped by the PSC code the government recorded on the award, taken from USAspending.gov and last refreshed Sep 24, 2026. Miscoded awards stay miscoded here; we do not reassign codes.
- 2Published distribution over 37 awards, computed Sep 12, 2026 (snapshot 922e32da16e1).