PSC R428: Industrial Hygienics
Service code
Code facts
- Spend category
- Professional Services Management Advisory Services
- Part of
-
-
R
- R4
-
R
- Contract awards
- 26 In the last 12 months
- Contract obligations
- $12,877,277 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 | $27,500 |
| FY2026 | $6,687,357 |
| FY2025 | $12,877,277 |
| FY2024 | $20,175,100 |
| FY2023 | $16,785,760 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Dgi-Ati II LLC | $4,110,684 | |
| 2 | Cfol International Inc. | $385,259 | |
| 3 | Consolidated Safety Services Incorporated | $383,615 | |
| 4 | Aehs Incorporated | $362,435 | |
| 5 | Cayuse Technologies, LLC | $264,176 | |
| 6 | Cenpec, LLC | $237,889 | |
| 7 | Property & Environmental Management Inc. | $213,192 | |
| 8 | JH1 Consultants, LLC | $212,446 | |
| 9 | Rogue Industries LLC | $178,725 | |
| 10 | Arbor Environmental LLC | $159,514 |
See the full FY2025 ranking of PSC R428 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Washington Headquarters Service | $4,110,684 | |
| 2 | Department of the Army | $909,920 | |
| 3 | Department of Veterans Affairs | $756,863 | |
| 4 | Department of the Treasury | $502,065 | |
| 5 | Defense Health Agency | $374,273 | |
| 6 | Department of Health and Human Services | $362,115 | |
| 7 | Department of Justice | $213,192 | |
| 8 | Department of Agriculture | $185,481 | |
| 9 | General Services Administration | $5,277 |
Top NAICS codes by obligations
| Rank | NAICS code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | 541620 Environmental Consulting Services | $5,879,393 | |
| 2 | 541611 Administrative Management and General Management Consulting Services | $385,259 | |
| 3 | 541690 Other Scientific and Technical Consulting Services | $357,566 | |
| 4 | 541350 Building Inspection Services | $213,192 | |
| 5 | 621399 Offices of All Other Miscellaneous Health Practitioners | $92,497 | |
| 6 | 541330 Engineering Services | $50,678 | |
| 7 | 562211 Hazardous Waste Treatment and Disposal | $44,087 | |
| 8 | 624190 Other Individual and Family Services | $42,889 | |
| 9 | 562112 Hazardous Waste Collection | $35,917 | |
| 10 | 541490 Other Specialized Design Services | $34,312 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Virginia | $3,919,907 | |
| 2 | Maryland | $806,985 | |
| 3 | Texas | $626,611 | |
| 4 | Ohio | $213,192 | |
| 5 | Florida | $178,725 | |
| 6 | California | $170,457 | |
| 7 | Georgia | $159,781 | |
| 8 | North Carolina | $144,500 | |
| 9 | Alabama | $142,730 | |
| 10 | Massachusetts | $127,115 | |
| 11 | South Carolina | $110,488 | |
| 12 | Minnesota | $80,004 | |
| 13 | Kansas | $70,864 | |
| 14 | Kentucky | $41,012 | |
| 15 | Puerto Rico | $29,980 | |
| 16 | U.S. Virgin Islands | $17,245 | |
| 17 | Vermont | $6,215 | |
| 18 | Louisiana | $2,970 | |
| 19 | Maine | $2,710 | |
| 20 | Wisconsin | $1,877 |
Show all 20
Shares are of everything obligated under PSC R428 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 165 listed here. See the rest on GovTribe.
Quick answers
What is PSC R428?
PSC R428 is Industrial Hygienics, a service code in PSC R, Support Services (Professional, Administrative, Management).
How much do federal agencies spend under PSC R428?
Federal contracts under PSC R428 obligated $12,877,277 in fiscal year 2025 and $56,552,995 in fiscal years 2023 through 2027.
Who are the largest contractors under PSC R428?
The contractors with the most obligated under PSC R428 in fiscal years 2026 and 2027 are Dgi-Ati II LLC ($4,110,684), Cfol International Inc. ($385,259) and Consolidated Safety Services Incorporated ($383,615).
Which agencies buy the most under PSC R428?
The agencies that obligated the most under PSC R428 in fiscal years 2026 and 2027 are Washington Headquarters Service ($4,110,684), Department of the Army ($909,920) and Department of Veterans Affairs ($756,863).
Which NAICS codes are used with PSC R428?
The NAICS codes with the most obligated under PSC R428 in fiscal years 2026 and 2027 are 541620 Environmental Consulting Services, 541611 Administrative Management and General Management Consulting Services and 541690 Other Scientific and Technical Consulting Services.
Where is the work under PSC R428 performed?
By place of performance, the states with the most contract obligations under PSC R428 over the last 12 months are Virginia ($3,919,907), Maryland ($806,985) and Texas ($626,611).
What is the latest contract opportunity under PSC R428?
The latest contract opportunity under PSC R428 is R428--FY27 SERVICES (1x) Spill Prevention, Control, and Countermeasure (SPCC) Plan, special notice from Veterans Integrated Service Network 2 (VHA), posted October 21, 2026.
On GovTribe
See everything under PSC R428
- Federal contract opportunities, awards and IDVs under this code
- Funding analysis by contractor, agency and set-aside
- Contacts who buy under this code
- Ask GovTribe AI about this code