Stefan Schwarzer
Stefan Schwarzer uses Python since 1999. He's written articles and a book on Python and given talks at several Python and Linux conferences. Although Stefan studied chemical engineering and has a doctor's degree in it, he's been working in software development since 2000. Nowadays Stefan is a freelancer in software development [1], mostly with Python. He's also the maintainer of the FTP client library ftputil [2].
[1] http://sschwarzer.com [2] http://ftputil.sschwarzer.net