Chris Evans is the author of vsftpd, a vulnerability researcher and for a paycheck, he built and now looks after the Google Chrome Security Team. Unruly bunch.
Details of vsftpd are at https://security.appspot.com/vsftpd.html. His research includes vulnerabilities in all the major browsers (Firefox, Safari, Internet Explorer, Opera, Chrome); the Linux and OpenBSD kernels; Sun's JDK; and lots of open source packages. He blogs about some of his work at http://scarybeastsecurity.blogspot.com/. At Google, Chris is passionate about watching out for hundreds of millions of Chrome end users.
Whilst at Google, Chris has launched Vulnerability Reward Programs for both Chromium and Google web properties. He asserts that both have been very successful and has very much enjoying engaging in moving security forward with the wider security community.
Chris presents at various conferences, preferably in interesting locations (PacSec, HiTB Dubai, HiTB Malaysia, BlackHat Europe, HiTB Amsterdam, OWASP, etc.) and is on the HiTB and WOOT paper selection panels.