What is NISPOM?

NISPOM stands for the National Industrial Security Program Operating Manual. It's a comprehensive set of security regulations and procedures established by the U.S. government to protect classified information that is disclosed to or developed by U.S. contractors and licensees. It outlines requirements for safeguarding classified information, personnel security, physical security, information systems security, and other aspects of industrial security. It is commonly used by defense contractors and other organizations that work with classified U.S. government information.