JD
John D Duffy
Shell Beach, CA
Professional Engineer
Verified Active
About
John D Duffy is a Professional Engineer licensed to practice in California. The credential is registered under license number GEO 5127 and is currently active. It has been on record since 1991. Licensure is issued and verifiable through the California Board for Professional Engineers, Land Surveyors, and Geologists.
License Verification
License #
GEO 5127
Status
Active
State
CA
Expires
Feb 28, 2026
Board
California Board for Professional Engineers, Land Surveyors, and Geologists