It's not rocket science... Licensed?

How Do I Verify If An Engineer is Licensed?

“Non-Engineer” Answer: Check with your State’s engineering licensure board

Explanation: Nearly every state has an on-line method of looking up and/or verifying those engineers licensed to practice in your state. If after searching, the individual does not appear then chances are they may not be licensed to practice in your state. Always take that extra step to verify that your engineer is licensed to practice in your state.

Commentary: Engineering may employ science and physics but as a profession it is regulated at a state level. As such, you can not assume that because an individual is licensed to practice in one state, they are licensed (or allowed) to practice in another state.