From Zarafa wiki
Hi, my name is Marco Welter and I am a employee of Zarafa Deutschland GmbH. My job is Business Development / Partner sales. I am in OpenSource business since 2000 and have Linux expirience since 1995. In 2002 I become certified to a RedHat Certified Engineer. Since 2001 I worked in groupware business and have a lot of expirience in opensource Groupware.