As a keyboardist Mark has played with a lot of artists in the Netherlands (NL) such as Sabrina Starke, Boris, Sandra van Nieuwland, Ben Saunders, Glennis Grace, Shermanology, Ali B, Fresku, Sharon Doorson, Rochelle and many more. Currently he's the keyboardplayer (and Musical Director) for Brace and keyboard player (MD) / music production team member for Idols (NL). He also works as a producer / composer for several artists mentioned earlier.