Rock Energy Systems LLC
At a glance
Employees100-499
In business sinceNot reported
HeadquartersJanesville, WI
SAM.gov UEIN1R8EGQHYKF7
CAGE code21RZ0
- portable heaters
- SF80
- SF120
- refurbished heaters
- Frigid Fix Diesel Anti-Gel
- garages
- workshops
- auto shops
- construction sites
Named on the company’s own website, read JUL 29, 2026
Supplier designations
For Profit OrganizationManufacturer of Goods
Self-certified by the company in its SAM.gov registration
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Rock Energy Systems LLC | Janesville | WI | 100–499 | ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.