Challenge RFF-Trophée Monal 2013
|2016 Rio de Janeiro||Team épée|
|2016 Rio de Janeiro||Individual|
Grumier won the gold medal in the épée team event at the 2006 World Fencing Championships after beating Spain in the final. He accomplished this with his team mates Érik Boisse, Ulrich Robeiri and Fabrice Jeannet. He was also part of the French teams that won in 2010, 2011 and 2014. He won the silver medal in the individual épée event at the 2010 World Fencing Championships and at the 2015 World Fencing Championships.
He began fencing at the age of 3, taken along to training sessions by his father who was a fencing coach.
- 2006 World Fencing Championships, team épée
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