PSC AC21: National Defense R&D Services; Atomic Energy Defense Activities; Basic Research
Service code
Code facts
- Spend category
- Research and Development
- Part of
-
-
A
- AC
-
A
- Contract awards
- 3 In the last 12 months
- Contract obligations
- $276,713,598 In FY2025
PSC codes and definitions come from the GSA PSC Manual and contract spending from SAM.gov/FPDS.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $24,708,859 |
| FY2026 | $215,162,711 |
| FY2025 | $276,713,598 |
| FY2024 | $311,054,263 |
| FY2023 | $296,858,167 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Bluestaq LLC | $147,793,842 | |
| 2 | Kratos S2, Inc. | $26,931,886 | |
| 3 | Accion Systems Inc. | $19,975,608 | |
| 4 | Tecolote Research, Inc. | $14,274,394 | |
| 5 | Amentum Technology, Inc. | $11,462,112 | |
| 6 | X-Bow Launch Systems Inc. | $6,264,815 | |
| 7 | Serco Inc. | $4,251,776 | |
| 8 | Nevada System Of Higher Education | $4,067,338 | |
| 9 | Quartus Engineering Incorporated | $3,213,300 | |
| 10 | QWK Integrated Solutions, LLC | $3,023,575 |
See the full FY2025 ranking of PSC AC21 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Air Force | $229,874,650 | |
| 2 | Department of the Army | $9,106,809 | |
| 3 | Department of Energy | $4,067,338 | |
| 4 | Defense Logistics Agency | $1,199,974 | |
| 5 | Department of the Navy | $625,000 |
Top NAICS codes by obligations
| Rank | NAICS code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 541990 All Other Professional, Scientific, and Technical Services | $147,793,842 | |
| 2 | 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $60,410,276 | |
| 3 | 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology) | $30,226,115 | |
| 4 | 561790 Other Services to Buildings and Dwellings | $1,199,974 | |
| 5 | 541330 Engineering Services | $240,000 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Colorado | $174,683,057 | |
| 2 | California | $22,831,410 | |
| 3 | Massachusetts | $19,975,608 | |
| 4 | Tennessee | $11,462,112 | |
| 5 | Alabama | $5,849,241 | |
| 6 | Nevada | $4,067,338 | |
| 7 | Texas | $3,648,575 | |
| 8 | Connecticut | $1,199,974 | |
| 9 | New Mexico | $922,031 | |
| 10 | Utah | $432 |
Shares are of everything obligated under PSC AC21 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show all 25
Quick answers
What is PSC AC21?
PSC AC21 is National Defense R&D Services; Atomic Energy Defense Activities; Basic Research, a service code in PSC A, Research and Development.
How much do federal agencies spend under PSC AC21?
Federal contracts under PSC AC21 obligated $276,713,598 in fiscal year 2025 and $1,124,497,599 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC AC21?
The contractors with the most obligated under PSC AC21 in fiscal years 2026 and 2027 are Bluestaq LLC ($147,793,842); Kratos S2, Inc. ($26,931,886); and Accion Systems Inc. ($19,975,608).
Which agencies buy the most under PSC AC21?
The agencies that obligated the most under PSC AC21 in fiscal years 2026 and 2027 are Air Force ($229,874,650), Department of the Army ($9,106,809) and Department of Energy ($4,067,338).
Which NAICS codes are used with PSC AC21?
The NAICS codes with the most obligated under PSC AC21 in fiscal years 2026 and 2027 are 541990 All Other Professional, Scientific, and Technical Services; 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology); and 541712 Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology).
Where is the work under PSC AC21 performed?
By place of performance, the states with the most contract obligations under PSC AC21 over the last 12 months are Colorado ($174,683,057), California ($22,831,410) and Massachusetts ($19,975,608).
What is the latest contract opportunity under PSC AC21?
The latest contract opportunity under PSC AC21 is Development of Zirconium Carbide and superior high temperature ceramics for nuclear fission applications, special notice from Shared Services Center, posted October 6, 2026.
On GovTribe
See everything under PSC AC21
- Federal contract opportunities, awards and IDVs under this code
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