Daan is an all-round fighter with roots in Street fight. He is a good grabbler with a great strength.

In Vikingfight II he was up against Dave Ferguson from USA in a Mixfight match. Daan was forced to tap out when Dave applied a kimora with his leg and lost the fight in 1'st round.

In Vikingfight III Daan Kooiman was facing Mike Pyle from USA. Mike quickly caught Daan in a Rear naked choke and forced him to tap out in 1'st round.