Expert Witness Government Contracts
PSC R424 Service code
Code facts
- Spend category
- Professional Services Legal Services
- Part of
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-
R
- R4
-
R
- Contract obligations
- $195,023,331 In FY2025
PSC codes and definitions come from the GSA PSC Manual and contract spending from SAM.gov/FPDS.
Market summary
Top buying agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Justice | $74,519,623 | |
| 2 | Department of the Treasury | $47,745,624 | |
| 3 | Federal Trade Commission | $18,124,638 | |
| 4 | Department of the Navy | $9,117,060 | |
| 5 | Securities and Exchange Commission | $8,303,678 | |
| 6 | Department of the Army | $5,389,211 | |
| 7 | Department of Health and Human Services | $4,949,521 | |
| 8 | Air Force | $4,078,948 | |
| 9 | Social Security Administration | $2,261,140 | |
| 10 | Department of State | $1,270,440 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Analysis Group Inc. | $15,716,110 | |
| 2 | Berkeley Research Group, LLC | $12,860,883 | |
| 3 | FTI Consulting, Inc. | $9,278,914 | |
| 4 | The Brattle Group Inc. | $7,791,139 | |
| 5 | Bates White, LLC | $7,507,576 | |
| 6 | Russell, David T | $5,710,963 | |
| 7 | Cornerstone Research Inc. | $5,138,128 | |
| 8 | Morgan, Angel, Brigham & Associates L.L.C. | $4,363,978 | |
| 9 | Georgia TECH Applied Research Corp | $4,047,803 | |
| 10 | Beacon Group, LLC | $4,002,331 |
See the full FY2025 ranking of PSC R424 contractors, by parent company.
Open contract opportunities
Recent contract awards
| Award | Awarded | Obligated |
|---|---|---|
| Expert witness services / FY27ECU012 | $18,495 | |
| Expert witness services | $76,125 | |
| Expert witness services | $201,387 | |
| Expert witness services | $169,619 | |
| SME services - paul lynch, MD | $10,000 | |
| Expert witness/litigative case support | $7,816 | |
| Expert witness/litigative case support | $19,866 | |
| Expert witness services | $160,950 | |
| Expert witness services "EO 14398" | $250,000 | |
| Expert witness services | $50,568 |
Latest 10 of 1,324 awarded in the last 12 months listed here. See the rest on GovTribe.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $1,288,812 |
| FY2026 | $167,783,311 |
| FY2025 | $195,023,331 |
| FY2024 | $301,831,246 |
| FY2023 | $344,825,637 |
Top NAICS codes by obligations
| Rank | NAICS code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 541199 All Other Legal Services | $61,285,618 | |
| 2 | 541690 Other Scientific and Technical Consulting Services | $31,091,463 | |
| 3 | 541990 All Other Professional, Scientific, and Technical Services | $19,010,535 | |
| 4 | 541611 Administrative Management and General Management Consulting Services | $18,131,952 | |
| 5 | 541330 Engineering Services | $10,449,066 | |
| 6 | 524298 All Other Insurance Related Activities | $6,693,262 | |
| 7 | 531320 Offices of Real Estate Appraisers | $5,617,263 | |
| 8 | 541110 Offices of Lawyers | $3,419,241 | |
| 9 | 541618 Other Management Consulting Services | $2,787,583 | |
| 10 | 621111 Offices of Physicians (except Mental Health Specialists) | $2,571,214 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | District of Columbia | $38,236,510 | |
| 2 | Massachusetts | $25,745,955 | |
| 3 | California | $21,298,002 | |
| 4 | Virginia | $20,590,053 | |
| 5 | Texas | $9,322,602 | |
| 6 | Georgia | $9,296,769 | |
| 7 | New York | $8,365,456 | |
| 8 | Maryland | $6,679,386 | |
| 9 | Florida | $5,708,240 | |
| 10 | Pennsylvania | $4,888,800 | |
| 11 | Colorado | $2,673,548 | |
| 12 | Michigan | $2,558,795 | |
| 13 | New Jersey | $1,899,268 | |
| 14 | Illinois | $1,860,362 | |
| 15 | Maine | $1,712,719 | |
| 16 | Wisconsin | $1,534,955 | |
| 17 | Utah | $1,005,603 | |
| 18 | Louisiana | $757,511 | |
| 19 | Mississippi | $706,601 | |
| 20 | Arkansas | $630,840 | |
| 21 | Alabama | $592,804 | |
| 22 | New Mexico | $575,676 | |
| 23 | Washington | $398,510 | |
| 24 | Montana | $388,374 | |
| 25 | Kentucky | $387,049 | |
| 26 | Puerto Rico | $329,181 | |
| 27 | Ohio | $305,729 | |
| 28 | Rhode Island | $282,998 | |
| 29 | Nevada | $239,538 | |
| 30 | Vermont | $228,210 | |
| 31 | Hawaii | $144,073 | |
| 32 | South Dakota | $136,920 | |
| 33 | North Carolina | $109,546 | |
| 34 | New Hampshire | $78,021 | |
| 35 | South Carolina | $65,681 | |
| 36 | North Dakota | $51,763 | |
| 37 | Oklahoma | $31,802 |
Show all 37
Shares are of everything obligated under PSC R424 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Quick answers
What is PSC R424?
PSC R424 is Expert Witness, a service code in PSC R, Support Services (Professional, Administrative, Management).
How many government contracts for expert witness are there?
1 contract opportunity under PSC R424 is open now. Federal agencies awarded 1,324 contracts under PSC R424 in the last 12 months, obligating $167,301,670.
How much do federal agencies spend under PSC R424?
Federal contracts under PSC R424 obligated $195,023,331 in fiscal year 2025 and $1,010,752,337 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC R424?
The contractors with the most obligated under PSC R424 in fiscal years 2026 and 2027 are Analysis Group Inc. ($15,716,110); Berkeley Research Group, LLC ($12,860,883); and FTI Consulting, Inc. ($9,278,914).
Which agencies buy the most under PSC R424?
The agencies that obligated the most under PSC R424 in fiscal years 2026 and 2027 are Department of Justice ($74,519,623), Department of the Treasury ($47,745,624) and Federal Trade Commission ($18,124,638).
Which NAICS codes are used with PSC R424?
The NAICS codes with the most obligated under PSC R424 in fiscal years 2026 and 2027 are 541199 All Other Legal Services; 541690 Other Scientific and Technical Consulting Services; and 541990 All Other Professional, Scientific, and Technical Services.
Where is the work under PSC R424 performed?
By place of performance, the states with the most contract obligations under PSC R424 over the last 12 months are the District of Columbia ($38,236,510), Massachusetts ($25,745,955) and California ($21,298,002).
What is the latest open contract opportunity under PSC R424?
The latest open contract opportunity under PSC R424 is Medical Case Reviewer Services for the Vaccine Injury Compensation Program (VICP)/ Countermeasures Injury Compensation Program (CICP), solicitation from Health Resources and Services Administration, posted August 25, 2025.
On GovTribe
See everything under PSC R424
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
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