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PSC B521 — Historical Studies: federal contracts
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What PSC B521 covers
Description: Historical Studies
Official definition: GSA PSC Manual (PSC April 2025.xlsx), acquisition.gov/psc-manual. Category: Professional Services › Management Advisory Services.
Who is winning new PSC B521 work
Contractors ranked by obligations on awards that started FY2024–FY2027 to date.
| Contractor | Obligations | Awards |
|---|---|---|
| DOWNTOWN BUSINESS IMPROVEMENT DISTRICT CORP | $2.3M | 1 |
| FORENSIC GENEALOGY SERVICES, LLC | $1.2M | 21 |
| DDC 4C, LLC | $739K | 1 |
| HISTORICAL RESEARCH ASSOCIATES, INC. | $614K | 9 |
| TECHTRANS INTERNATIONAL INC | $499K | 1 |
| NEW SOUTH ASSOCIATES, INC. | $425K | 4 |
| PRESERVE BLACK AMERICA ATLANTA, LLC | $340K | 2 |
| MORTIMER JOHN | $300K | 1 |
| PARLIAMENT LLC | $266K | 3 |
| THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK | $250K | 1 |
How competitive is PSC B521?
- 53.4% of obligations on these awards were competed.
- 17.6% of competed awards that report offers drew a single offer (n=51).
- 66.6% went to small businesses.
- The five largest contractors hold 53.1% across 55 contractors.
NAICS codes used on PSC B521 awards
| NAICS | Industry | Share |
|---|---|---|
| 561990 | All Other Support Services | 22.6% |
| 541990 | All Other Professional, Scientific, and Technical Services | 22.5% |
| 541720 | Research and Development in the Social Sciences and Humanities | 19.9% |
| 541620 | Environmental Consulting Services | 12.9% |
| 711510 | Independent Artists, Writers, and Performers | 5.4% |
| 541690 | Other Scientific and Technical Consulting Services | 4.0% |
| 712110 | Museums | 3.9% |
| 115310 | Support Activities for Forestry | 3.7% |
Related PSC codes
R499 Other Professional Services · B503 Archeological/Paleontological Studies · B510 Environmental Studies and Assessments · F999 Other Environmental Services, Studies, and Analytical Support · F099 Other Natural Resources and Conservation Services · B599 Other Special Studies and Analysis · C219 Other Architect and Engineering Services · R404 Land Surveys, Cadastral Services (non-construction)
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