Mark Gerhard is the former CEO (Chief Executive Officer) and CTO (Chief Technical Officer) of Jagex. He replaced Geoff Iddison as CEO start of 2009 and has an official Jagex moderator account called Mod MMG. He also has a personal account he goes on often (also known as his "choob" account) which name is unknown (but has just passed "level 90"). He was working as CTO for a year before he was appointed as CEO of Jagex on 30th January (and lead Jagex from 1st February), 2009 when Geoff Iddison resigned in January. On thursday 6th August 2009 he also did a live question and answer session which can be found here.