Sebastian moved to England from his native Denmark in 2000 to study music, but left before completion of his degree to concentrate on playing.
He has previously worked with Alberta Cross, Brett Anderson, Alesha Dixon, Pleasure, Richard Fleeshman and Sophie Ellis-Bextor.
Currently, Sebastian is the drummer for Marina and the Diamonds.
Sebastian says: "I have tried many different cymbal brands but have only used Zildjian for the last five years or so as I find them absolutely superior to any other brand. Therefore, I am very excited to have Zildjian's support".