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About The Author:


Don OShall, CMIL

Don OShall has been the Supervisor of the Lehigh University Office of Access Control and Locksmithing for over 25 years. He is a member of the Lock Industry Standards and Training Council (LIST Council), and a Director for the Institutional Locksmiths Association. He served as the original chair and later co-chair) of its Certification Committee.

He is an internationally recognized authority on interchangeable cores, master keying, system design, key control and commercial/institutional hardware. He taught courses for the All Lock Service Institute, and has taught classes in various locksmithing courses for many associations all across the country for over nearly forty years.

He was Senior Instructor for the New York and National Schools of Locksmithing (New York City and Chicago) for over seven years. He was a staff author for The National Locksmith magazine articles beginning in 1984, and is a contributing author and Associate Editor for The Institutional Locksmith magazine.

Don has been awarded the Gerald J. Connelly Jr Pioneer Award, and has been the recipient of many other honors.



About The Author:



John Truempy, CMIL

John Truempy is the Supervisor of the University of Pennsylvania Locksmithing. He is a former Chairman of the Board, Vice President and Director for the Institutional Locksmiths Association. He served as the co-chair of its Certification Committee.

He is a nationally recognized authority on master keying, system design, key control, institutional lock forensics and commercial/institutional hardware. He taught courses for many associations all across the country.

He is a contributing author for The Locksmith Ledger International magazine.

  • International Association of Investigative Locksmiths, Member; Director, National Board; Editor and Publisher, IAIL Journal; Chair of Conference Vendor Committee.
  • Locksmith Industry Standards Terminology (LIST) Council, Member. (The Council is responsible for producing the Locksmith Dictionary.)
  • Associated Locksmiths of America, Member.