Mr. Loscocco is a senior research scientist with the Information Assurance Research Group of NSA where he has studied problems associated with computer and network security since 1985. Since 1990, he has concentrated in the area of operating system security where he has helped develop a series of prototype secure operating systems. He currently leads NSA's operating system research program. Mr. Loscocco and his team developed SELinux, the secure variant of Linux that NSA released in December 2000 to help influence the direction of security in mainstream operating systems.