Grimmette also won nine medals at the FIL World Luge Championships with two silvers (Mixed team: 2004, 2005) and seven bronzes (Men's doubles: 1999, 2000, 2004, 2005, 2007, 2009; Mixed team: 2001). He won the overall Luge World Cup men's doubles title three times (1997–1998, 1998–1999, 2002–2003). He was selected in December 2009 to compete in the 2010 Winter Olympics.