The National Safeman's Organization (NSO) is one of North America's largest organizations of safe and vault technicians. It provides technical training at periodic "Penetration Parties" and offers three levels of certification:
The organization was formed in the fall of 1992 between National Publishing and safe expert Dave McOmie. Mr. McOmie has served continuously as the organization's director.[1] The NSO publishes a quarterly newsletter, The National Safeman.[2]