PSC R425: Support – Professional: Engineering/Technical
R425 is the product and service code (PSC) federal agencies use for support – professional: engineering/technical, in the professional services group. Here are the contracts open under it now, the NAICS codes it pairs with, and who buys and wins this work.
- Open contracts now
- 66
- Spending, FY2026
- $25.2 billion
- Share to small businesses
- 30%
Open contracts with PSC R425, due soonest
- Design Basis Threat (DBT) and Target Sets Security
Due in 2 daysOct 12, 2026
- Flow-Induced Vibration Review and Guidance
Due in 2 daysOct 12, 2026
- Engineering Drawings IDIQ
Due in 2 daysOct 12, 2026
- PAE Maritime Professional Support Services
Due in 2 daysOct 12, 2026
- MSC Engineering Drawings IDIQ
Due in 2 daysOct 12, 2026
- SOURCES SOUGHT Data at Rest (DaR) - 400 Obsolescence Resolution
✦ The Air Force (AFLCMC/WIW) is doing market research for installing and integrating a replacement for the E-3G AWACS DAR-400 data-at-rest unit, using a Government-owned KG-204…
Due in 3 daysOct 12, 2026
Where R425 sits in the PSC Manual
- Category: Service
- Group R: Support SVCS (Prof, Admin, MGMT)
- Group R4: Professional Services
- Code R425: Support – Professional: Engineering/Technical
NAICS codes used with PSC R425
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with R425 most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 541330 | Engineering Services | $41.5 billion |
| 541715 | Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $12.8 billion |
| 541712 | Research and Development in the Physical, Engineering, and Life Sciences (Except Biotechnology) | $5.8 billion |
| 541990 | All Other Professional, Scientific, and Technical Services | $4.8 billion |
| 541512 | Computer Systems Design Services | $4.7 billion |
| 541611 | Administrative Management and General Management Consulting Services | $3.6 billion |
| 336611 | Ship Building and Repairing | On 5 open |
| 541690 | Other Scientific and Technical Consulting Services | On 2 open |
| 541511 | Custom Computer Programming Services | On 2 open |
Who buys under PSC R425
Agencies with the most contract dollars under R425 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Department of the Air Force | $29.7 billion |
| Department of the Navy | $19.8 billion |
| Department of the Army | $13.2 billion |
| Federal Acquisition Service | $4.7 billion |
| Agency for International Development | $3.6 billion |
| National Aeronautics and Space Administration | $3.2 billion |
| Federal Aviation Administration | $2.5 billion |
| Department of Energy | $2.1 billion |
On open notices right now, the most R425 work comes from Dept of Defense, Nuclear Regulatory Commission and Department of Transportation.
Federal spending under PSC R425 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $32.4 billion |
| FY2025 | $32.8 billion |
| FY2026 | $25.2 billion |
| FY2027 (so far) | $5.5 million |
Who wins PSC R425 contracts
| Company | Obligated, last 3 years |
|---|---|
| The Aerospace Corporation | $3.4 billion |
| Booz Allen Hamilton Inc | $2.3 billion |
| Chemonics International, Inc. | $2.2 billion |
| Caci, Inc. - Federal | $2 billion |
| General Atomics Aeronautical Systems, Inc. | $1.8 billion |
| Science Applications International Corporation | $1.8 billion |
| The Mitre Corporation | $1.4 billion |
| Lockheed Martin Corp | $1.4 billion |
| JT4 LLC | $1.2 billion |
| Parsons Government Services Inc. | $1.1 billion |
Related PSC codes
- R401 Support – Professional: Personal Care (Non – Medical)
- R402 Support – Professional: Real Estate Brokerage
- R403 Real Estate Brokerage Services
- R404 Support – Professional: Land Surveys – Cadastral (Non – Construction)
- R405 Support – Professional: Operations Research/Quantitative Analysis
- R406 Support – Professional: Policy Review/Development
- R407 Program Evaluation Services
- R408 Support – Professional: Program Management/Support
- R409 Program Review/Development Services
- R410 Support – Professional: Program Evaluation/Review/Development
Frequently asked questions
What is PSC R425?
R425 is the service code in the federal Product and Service Code (PSC) Manual for support – professional: engineering/technical, under R (Support SVCS (Prof, Admin, MGMT)) and R4 (Professional Services). Agencies put a PSC on every contract to record what they bought.
What is the difference between a PSC and a NAICS code?
A PSC describes what the government is buying. A NAICS code describes the industry of the business doing the work, and it sets the SBA size standard for small business set-asides. Every contract notice has both.
Which NAICS code goes with PSC R425?
Most federal contract dollars under PSC R425 go with NAICS 541330 (Engineering Services), according to USAspending.gov. The contracting officer picks the NAICS code for each solicitation, so check the notice.
How do I find contracts that use PSC R425?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. 66 open notices use PSC R425 right now. FedReady can match new ones to your business and email you, free.