Martijn Mobron a.k.a DJ X-ess started his career in 1995 as a resident-DJ of the "Swing", a club in Apeldoorn. In the beginning of 1996 things changed rapidly for X-ess when he started as A&R manager (Artist & Repetoire) at Hollands biggest independent label: [[label:ID&T]] Music.

During the following four years DJ X-ess played at most major parties throughout Europe: Thunderdome, Mysteryland, Energy, Global Hardcore Nation, etc.

In the year 2001 Martijn decided, together with DJ [[artist:Promo]], to start a new independent label: [[label:The Third Movement]].

The label has been focussing rather on creative output than on commercial success, giving new artists a chance to experiment and test their style.

In 2004 he, and [[artist:Bart Kok]] ([[artist:Catscan]]) left The Third Movement to start their own new label, [[label:Pro Artist Management]].