PSC codes › R428
PSC R428 — Industrial Hygienics: federal contracts
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What PSC R428 covers
Description: Industrial Hygienics
Official definition: GSA PSC Manual (PSC April 2025.xlsx), acquisition.gov/psc-manual. Category: Professional Services › Management Advisory Services.
Who is winning new PSC R428 work
Contractors ranked by obligations on awards that started FY2024–FY2027 to date.
| Contractor | Obligations | Awards |
|---|---|---|
| ATI-ENDYNA JV, LLC | $4.0M | 3 |
| DGI-ATI II LLC | $4.0M | 1 |
| CONSOLIDATED SAFETY SERVICES INCORPORATED | $3.2M | 2 |
| CFOL INTERNATIONAL INC | $759K | 1 |
| CENPEC, LLC | $694K | 1 |
| MABBETT & ASSOCIATES, INC. | $693K | 22 |
| R & J GLOBAL INDUSTRIES, INC. | $667K | 18 |
| ARBOR ENVIRONMENTAL LLC | $660K | 9 |
| THE GLOCOMS GROUP INC | $640K | 1 |
| ROGUE INDUSTRIES LLC | $579K | 3 |
How competitive is PSC R428?
- 89.5% of obligations on these awards were competed.
- 15.6% of competed awards that report offers drew a single offer (n=64).
- 82.8% went to small businesses.
- The five largest contractors hold 65.9% across 46 contractors.
NAICS codes used on PSC R428 awards
| NAICS | Industry | Share |
|---|---|---|
| 541620 | Environmental Consulting Services | 86.3% |
| 541690 | Other Scientific and Technical Consulting Services | 4.4% |
| 541611 | Administrative Management and General Management Consulting Services | 4.0% |
| 621399 | Offices of All Other Miscellaneous Health Practitioners | 2.5% |
| 541490 | Other Specialized Design Services | 1.2% |
| 562910 | Remediation Services | 1.0% |
| 621340 | Offices of Physical, Occupational and Speech Therapists, and Audiologists | 0.4% |
| 561210 | Facilities Support Services | 0.1% |
Related PSC codes
F999 Other Environmental Services, Studies, and Analytical Support · B510 Environmental Studies and Assessments · R499 Other Professional Services · F108 Hazardous Substance Removal, Cleanup, and Disposal Services and Operational Support · B599 Other Special Studies and Analysis · F107 Hazardous Substance Analysis · R404 Land Surveys, Cadastral Services (non-construction) · F101 Air Quality Support Services
Win PSC R428 work with FedSift
- Matched to your company — PSC R428 solicitations ranked against your capabilities, NAICS and certifications, with a fit score for each
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- A pipeline that watches the dates — question cutoffs and response deadlines from what the notice states, amendments and new versions as they post
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