Rubuta ci gaba don wannan sakin layi - Grumier ya lashe lambar zinare a gasar cin kofin duniya ta 2006 a gasar zakarun duniya bayan ya doke Spain a wasan karshe. Ya cika wannan tare da abokan aikinsa Érik Boisse, Ulrich Robeiri da Fabrice Jeannet. Ya kuma kasance wani ɓangare na ƙungiyoyin Faransa waɗanda suka ci nasara a 2010, 2011 da 2014
Ka yi haƙuri. Ya lashe lambar azurfa a cikin taron épée na mutum a Gasar Cin Kofin Duniya ta 2010 da kuma Gasar Cin Kofin Duniya ta 2015.