Competing in five Winter Olympics, he won two medals in the men's doubles event with a silver in 2002 and a bronze in 1998.

He won the overall Luge World Cup men's doubles title three times (1997–1998, 1998–1999, 2002–2003).

Grimmette carried the United States flag during the opening ceremony of the 2010 Winter Olympics in Vancouver.

[2] On April 29, 2010, it was announced that Grimmette was named USA Luge's Sports Program Director and also was involved as a head coach.

Mark Grimmette lived in Muskegon, Michigan, and graduated from Reeths-Puffer High School originally, but moved to Lake Placid, New York, after being named to his current position.