License holder summary

JOHN WILLIAM CALLAHAN JR is a Professional Engineers licensed to practice in Maryland. The address on file for JOHN WILLIAM CALLAHAN JR is 95 ABACUS AVENUE, Ormond Beach 32174.

Maryland

Division of Occupational and Professional Licensing

JOHN WILLIAM CALLAHAN JR
Professional Engineers
License number
11655
Class
Professional Engineers
Status
Address
95 ABACUS AVENUE
licensingmd.com
ID 45928308
LAST UPDATED 2026-07-21 13:42:03 UTC

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