William Ross Winkler

What this record tells you

William Ross Winkler holds Florida licence MRSA5298, a MRSA classification which authorises work as a licensed mold assessor. An "R" prefix means the licence is registered, which limits work to the local jurisdictions that accepted it rather than the whole state.

This licence was first issued in 2025, which makes it one of the newer licences for the trade in this area. Roughly 83% of the 52 active mold inspection licences based in the Naples area were issued earlier than this one, and the local median sits at 2021. That is 1 year of continuous licensure.

William Ross Winkler is one of 47 active mold inspection licences registered to an address in Naples, so you have local alternatives to compare quotes against.

The licence is recorded as expiring on 07/31/2028. Florida licences renew on a fixed cycle, and a licence that is not renewed moves to delinquent status — which is why the expiry date matters if you are planning work close to that date. Confirm the current status on the state portal before signing a contract.

Before you hire William Ross Winkler

• Re-check licence MRSA5298 on the DBPR portal — status can change any day.
• Ask for a current certificate of liability insurance and workers' compensation, issued to you directly by their insurer.
• Confirm the name on your contract matches William Ross Winkler or its qualifying agent, William Ross Winkler.
• Compare at least three written quotes from other mold inspection contractors in Naples.
• Confirm in writing that the contractor — not you — pulls the building permit.