Sebastian Bergmann was born in 1978, lives in Siegburg, Germany, and studies computer science and biology at the University of Bonn. He is the author of the PHPUnit Pocket Guide and the German book Professionelle Softwareentwicklung mit PHP 5, writes for both print and online media, and is a frequent speaker at conferences.

Sebastian spends his free time with the development of free software, is a member of the PHP and Gentoo Linux development teams, and is author of a variety of PHP software projects such as PHPUnit and phpOpenTracker.