About 4security

We are a family run business with electrical licenses in both Massachusetts and Vermont. The founder of 4Security, David McKinnon, has been a Fire and Security Technician since 1979. David holds his Journeyman’s electrical license in the State of Vermont since 1982, and holds a Systems Contractors and Systems Technicians License” (C & D) in the Commonwealth of Massachusetts. 

Mr. McKinnon is a Board Certified Instructor, of the electrical and fire alarm code since 1992. He is one of first instructors, who had taught the C & D licensees at the Convention Center in Springfield, MA. 

Mr. McKinnon frequently teaches both the 8-hour classes in Vermont and the 15-hour Code Classes in Massachusetts. Recently we have been asked to teach C & D classes with the Massachusetts Electrical Contractors Association.


Mr. McKinnon and his sons, John and Clark, look forward to working with you. 

If you would like to reach out to 4Security, please click here.

David McKinnon