You have found the personal web page for John W. Rittinghouse, Ph.D., CISM. John is the author of numerous books on Internet Security, Program Management, Software Development, etc.  John has over 25 years experience in the IT and security sector.  He is an often-sought independent management consultant for large enterprise.  He is currently a member of the Federal Communication Commission's Homeland Security Network Reliability and Interoperability Council Focus Group on Cybersecurity, working in the Voice over Internet Protocol workgroup.  During his career, John has instituted and managed several international web development teams, global telecommunications operations, set up worldwide procurement, helpdesk, sales support, security, and networking operations, including implementing both instant-messaging and VoIP technologies on enterprise scales.  Here is John's biography.