Russell W O'Brien Jr.

What this record tells you

Russell W O'Brien Jr. holds Florida licence MRSA4148, 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 2022, which makes it a relatively recent licence for the trade in this area. Roughly 61% of the 398 active mold inspection licences based in the Miami area were issued earlier than this one, and the local median sits at 2020. That is 4 years of continuous licensure.

Russell W O'Brien Jr. is one of 240 active mold inspection licences registered to an address in Miami, 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 Russell W O'Brien Jr.

• Re-check licence MRSA4148 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 Russell W O'Brien Jr. or its qualifying agent, Russell W O'Brien Jr..
• Compare at least three written quotes from other mold inspection contractors in Miami.
• Confirm in writing that the contractor — not you — pulls the building permit.