According to the
BBC, Plumtree was an assistant coach with the
College Rovers in North Durban, helping them win "three successive Natal titles and the South African club championship in 1994-95". After retiring as a player, Plumtree coached the
Swansea Rugby Football Club in Wales for five seasons, winning the Welsh Cup (1999), the Welsh League (1998), and the Welsh-Scottish League (2001). Plumtree returned to South Africa after he found that he was not to be given a New Zealand side in the
Super Rugby tournament. Despite his success with Wellington, he was not appointed to guide the Wellington-based
Hurricanes, as had been expected Plumtree was appointed head coach of the Sharks in 2008. He successfully coached the Sharks to their first Currie Cup win since 1996, for which he was named the 2008 Absa Coach of the Year. Under Plumtree the Sharks had again reached the top of the Currie Cup log by September 2009. In August 2009 the Sharks' coach received the Coach of the Month award from Currie Cup sponsors Absa. The 2010 season was not off to a good start after a terrible Super 14 season for the Sharks however in the shadow of the abysmal performance, the 2010 Currie Cup season was highly successful for Plumtree as the Sharks won the 2010 ABSA Currie Cup. In 2013 he was confirmed as Forwards Coach for the
Ireland national team, working alongside new head coach
Joe Schmidt. In the 2015 season Plumtree became the assistant coach of the Hurricanes Super 15 franchise with
Chris Boyd being the head coach. == Personal life ==