Kees Cook has been working with Free Software since 1994, and is employed by Google to work on Chrome OS Security. Before that, he worked for Canonical as the Ubuntu Security Team's Tech Lead. He has helped admin the mirrors on kernel.org, and sometimes hacks on Inkscape. He has written several utilities including GOPchop and Sendpage, and contributes to other projects including Wine, MPlayer, and OpenSSH. He's been spending most of his time lately focused on security features in the Linux Kernel.