Education
Köster attended Bishops College in Cape Town and played in their First XV rugby team in 2006 and 2007.
Köster attended Bishops College in Cape Town and played in their First XV rugby team in 2006 and 2007.
He plays currently played for Bristol in the position of Flanker or Eight Manitoba In 2006, he played alongside Martin Muller and Mathew Turner. Köster made the Western Province Craven Week side in 2007 and 2008 when he was captain.
He was called up for South America Schools in both 2006 and 2007.
He made his Super Rugby debut for the Stormers in 2009, playing on the wing, but suffered a knee injury against the Lions at Newlands Stadium which put him out of action. His full-time return to the top flight was off the bench against the Griquas on 8 August 2010.
The following week he started at openside flank (no7) versus the Blue Bulls. Köster had Province"s highest tackle count (24 tackles) against the Blue Bulls, while his 11 ball carries was second only to Duane Vermeulen and he was one of only three WP players to secure a turnover.
In October 2012, it was announced that he would join Bath.
He scored his first try for his new club against Italian team Calvisano in the Amlin Challenge Cup. He joined RFU Championship club Bristol on a season long loan from August 2013, which evolved into Nick earning a permanent contract with Bristol.