User:Mazi
From LimeSurvey Manual
Mazi (Marcel Minke) has started working with Limesurvey in 2007. He knows the software and code base very well and is official Head of Support at Limesurvey. At his free time he helps users at the Limesurvey forums and the Limesurvey chat.
Marcel works as a freelancer, offering advanced (paid) support for Limesurvey. You can contact him at:
marcel.minke(at)limesurvey.org
Skype: marcel_minke