Born in 1988, Bastien began his musical apprenticeship at the age of six. In 2003, he was unanimously awarded a euphonium gold medal with "congratulations from the jury" at the Conservatoire de Nîmes. Then, in 2005, he obtained his music training diplomas and a euphonium gold medal unanimously with "congratulations of the jury" at the Villeurbanne Conservatory.

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In 2006, at the age of 17, he was awarded first prize at the Conservatoire National Supérieur de Musique et de Danse de Paris, where he was unanimously awarded a 1st prize with honours by the Jury in June 2009.

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In 2006, he won the European Competition for Young Soloists in Luxembourg. Bastien is Euphonium solo of the Paris Brass-Band (French Champion 2012, 2013, 2014, 2015, 2016, 2017) and member of the Prestige Brass Quartet (CD "Divertimento").

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Moreover, since 2006, he has been regularly invited by groups such as the Orchestre National de Lyon, the Orchestre Philharmonique de Radio-France, the Orchestre de l'Opéra National de Paris, the Orchestre National du Capitole de Toulouse, the Orchestre National de France,... These experiences have led him to play in prestigious venues and to work with the greatest conductors (Pierre Boulez, Tugan Sokhiev, Daniele Gatti,...)