PSC R425

Overview

The Product Service Code (PSC) system is the federal standard for classifying the goods and services acquired by the U.S. Government. PSCs are recorded in procurement reporting systems such as FPDS and SAM and are maintained through the PSC Manual and associated change-control procedures to support consistent tracking, analysis, and reporting of federal spending. The PSC Manual is the authoritative source for PSC wording, scope notes, and change history. ¹

The PSC R425 is listed in the PSC Manual as "Support- Professional: Engineering/Technical" and is described as including systems engineering, technical assistance, and other services used to support the program office during the acquisition cycle. Individual solicitations and statements of work determine the precise tasks procured under this PSC. ¹

What this PSC covers

• Systems engineering and systems-integration support. ¹
• Technical assistance to program offices during acquisition. ¹
• Acquisition-lifecycle engineering support (planning, requirements, trade studies). ¹
• Engineering analyses and studies — Not specified by official sources. ¹
• Detailed design or technical documentation — Not specified by official sources. ¹

Related NAICS and PSC codes

Type | Code | Descriptor

• | - | - PSC | R408 | Support- Professional: Program Management/Support PSC | R423 | Support- Professional: Intelligence PSC | R424 | Support- Professional: Expert Witness

Source: PSC Manual (service-code Category R entries). ¹

Typical contract pairings and use

Federal award records commonly report R425 actions together with engineering-related NAICS classifications, notably 541330 — Engineering Services — in FPDS award entries; that pairing appears repeatedly in FPDS search results. ³

Agencies report substantial obligations under R425 in service-contract inventories, reflecting frequent use for engineering and technical support task orders and service contracts across multiple departments. Agency inventories and analyses list R425 among commonly used service PSCs. ²

Frequently asked questions

• What activities are explicitly included under PSC R425?
  The PSC Manual explicitly lists systems engineering and technical assistance and refers broadly to services that support the program office during the acquisition cycle. Specific activities are defined by each solicitation and statement of work. ¹

• Is there a standard NAICS that must be used with PSC R425?
  The PSC Manual does not prescribe a single NAICS pairing. FPDS award records commonly pair R425 with 541330 (Engineering Services), but agencies select the NAICS that best describes the predominant work. ³

• Which agencies report the largest obligations under R425?
  Service-contract inventories and department reports show significant obligations classified to R425 across multiple agencies; specific totals vary by fiscal year and methodology and are reported at the agency level. See agency inventories for year-by-year detail. ²

• Where is the official definition and change history for R425?
  The PSC Manual contains the official definition, scope notes, and change-control history for service PSCs, including R425; acquisition.gov hosts the manual and spreadsheet attachments documenting activations and end-dates. ¹

Useful resources

• R425 — G2X overview
• Product and Service Code Manual (PSC Manual, April 2025 edition). ¹
• HHS — Example service-contract inventory analyses (agency-level reporting showing obligations by PSC). ²
• FPDS — Award search for PRODUCT_OR_SERVICE_CODE="R425" (FPDS award listings demonstrating common NAICS pairings). ³

References

1. Product and Service Code Manual, April 2025 (PSC Manual). https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf
2. HHS — FY service contract inventory reports and analysis (agency service-contract inventory summaries). https://www.hhs.gov/grants-contracts/contracts/get-ready-to-do-business/fy2015-service-contract-inventory-analysis-report/index.html
3. FPDS award search for PRODUCT_OR_SERVICE_CODE="R425" (FPDS ezSearch results). https://www.fpds.gov/ezsearch/search.do?indexName=awardfull&q=PRODUCT_OR_SERVICE_CODE%3A%22R425%22