 He also won three gold medals in the K1 team event at the ICF Canoe Slalom World Championships, earning them in 2007, 2010 and 2011.He won a total of eight medals at the European Championships (2 golds, 5 silvers and 1 bronze).Grimm won the 2009 Adidas Sickline whitewater extreme race, despite having little previous experience of extreme whitewater or indeed of paddling the creekboats used to enhance paddler safety.