PSC B541: Defense Studies
Service code
Code facts
- Spend category
- Professional Services Management Advisory Services
- Part of
-
-
B
- B5
-
B
- Contract awards
- 162 In the last 12 months
- Contract obligations
- $586,928,429 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 | $2,115,777 |
| FY2026 | $441,028,746 |
| FY2025 | $586,928,429 |
| FY2024 | $825,987,084 |
| FY2023 | $737,195,474 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Parsons Government Services Inc. | $123,344,658 | |
| 2 | The Johns Hopkins University Applied Physics Laboratory LLC | $114,010,895 | |
| 3 | The CNA Corporation | $69,986,172 | |
| 4 | The Rand Corporation | $45,515,421 | |
| 5 | Dzyne Technologies, LLC | $39,518,042 | |
| 6 | Booz Allen Hamilton Inc. | $10,014,423 | |
| 7 | Lockheed Martin Corp | $8,869,888 | |
| 8 | Hart Technologies, Inc. | $6,211,955 | |
| 9 | Leidos, Inc. | $5,711,780 | |
| 10 | A3 Technologies Inc. | $1,964,555 |
See the full FY2025 ranking of PSC B541 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Air Force | $208,022,812 | |
| 2 | Office of the Secretary of Defense | $106,874,773 | |
| 3 | Department of the Navy | $79,182,026 | |
| 4 | Department of the Army | $19,117,216 | |
| 5 | Defense Advanced Research Projects Agency | $18,482,138 | |
| 6 | Defense Threat Reduction Agency | $8,541,037 | |
| 7 | Washington Headquarters Service | $1,638,931 | |
| 8 | Missile Defense Agency | $1,164,225 | |
| 9 | Defense Finance and Accounting Service | $123,626 | |
| 10 | US Special Operations Command | $9,000 |
Top NAICS codes by obligations
| Rank | NAICS code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $214,800,477 | |
| 2 | 541990 All Other Professional, Scientific, and Technical Services | $193,969,010 | |
| 3 | 541330 Engineering Services | $17,406,634 | |
| 4 | 336411 Aircraft Manufacturing | $8,869,888 | |
| 5 | 541611 Administrative Management and General Management Consulting Services | $1,166,021 | |
| 6 | 336414 Guided Missile and Space Vehicle Manufacturing | $949,920 | |
| 7 | 541519 Other Computer Related Services | $945,839 | |
| 8 | 541714 Research and Development in Biotechnology (except Nanobiotechnology) | $699,997 | |
| 9 | 541713 Research and Development in Nanotechnology | $684,009 | |
| 10 | 518210 Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services | $653,150 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Virginia | $232,617,946 | |
| 2 | Maryland | $113,534,379 | |
| 3 | California | $76,890,647 | |
| 4 | Georgia | $8,879,887 | |
| 5 | Massachusetts | $3,511,738 | |
| 6 | Colorado | $2,144,976 | |
| 7 | New Mexico | $949,920 | |
| 8 | Louisiana | $806,274 | |
| 9 | Florida | $752,880 | |
| 10 | Michigan | $636,213 | |
| 11 | Missouri | $586,055 | |
| 12 | New Hampshire | $340,000 | |
| 13 | North Carolina | $325,791 | |
| 14 | Washington | $250,000 | |
| 15 | District of Columbia | $141,177 | |
| 16 | Connecticut | $50,000 |
Show all 16
Shares are of everything obligated under PSC B541 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 83 listed here. See the rest on GovTribe.
Quick answers
What is PSC B541?
PSC B541 is Defense Studies, a service code in PSC B, Special Studies/
How much do federal agencies spend under PSC B541?
Federal contracts under PSC B541 obligated $586,928,429 in fiscal year 2025 and $2,593,255,511 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC B541?
The contractors with the most obligated under PSC B541 in fiscal years 2026 and 2027 are Parsons Government Services Inc. ($123,344,658), The Johns Hopkins University Applied Physics Laboratory LLC ($114,010,895) and The CNA Corporation ($69,986,172).
Which agencies buy the most under PSC B541?
The agencies that obligated the most under PSC B541 in fiscal years 2026 and 2027 are Air Force ($208,022,812), Office of the Secretary of Defense ($106,874,773) and Department of the Navy ($79,182,026).
Which NAICS codes are used with PSC B541?
The NAICS codes with the most obligated under PSC B541 in fiscal years 2026 and 2027 are 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology); 541990 All Other Professional, Scientific, and Technical Services; and 541330 Engineering Services.
Where is the work under PSC B541 performed?
By place of performance, the states with the most contract obligations under PSC B541 over the last 12 months are Virginia ($232,617,946), Maryland ($113,534,379) and California ($76,890,647).
What is the latest contract opportunity under PSC B541?
The latest contract opportunity under PSC B541 is LARS Hardware Refresh, pre-solicitation from AFLCMC Robins AFB, posted October 6, 2026.
On GovTribe
See everything under PSC B541
- Federal contract opportunities, awards and IDVs under this code
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