GroundRosterRobert Kumbier
| Name | Robert Kumbier |
| License number | 1039462 |
| License type | Soil Tester |
| Based in | Woodruff, Wisconsin 54568 |
| Work types on the roster | Soil Testing |
| Phone | (715) 892-0382 |
"Based in" is the city on the business's state license record. That can be a mailing address; it doesn't tell you where the business works.
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How to verify this license
We publish the license details exactly as they appear in Wisconsin's official licensing records; we do not vouch for the business itself. Before hiring, look up license #1039462 directly with the state, confirm it is still active, and ask for a current certificate of insurance.
Source: Vilas County POWTS Program, last checked 2026-08-19. Verify at the official source.
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