Olivier Grangean graduated from the National Music Conservatory of Paris. As a scholar of the Yehudi Menuhin Foundation he was mentored by Pierre Dervaux and was ultimately rewarded with the First Prize of the Tokyo International Competition in 1991.

He has subsequently guest-conducted European, Asian and South American symphony orchestras including the Orchestre du Capitole de Toulouse, the Orchestre Lamoureux, the Orchestre de Bretagne, the Orchestre Pasdeloup (Théâtre du Châtelet, Salle Gaveau), the Orchestre de chambre de Lausanne, the Zagreb Philharmonic, the Slovak Radio Orchestra (Bratislava), the Slovak State Philharmonic (Kosice), the Fort Worth Chamber Orchestra (Meyerson Symphony Center-Dallas), the Niederösterreichisches Orchester (Konzerthaus-Vienne), the Japan Philharmonic, the Tokyo Philharmonic, the Shinsei Nihon Symphony Orchestra (Suntory Hall- Tokyo), the Orquesta Sinfónica Simón Bolivar de Venezuela, the Orquesta Filarmonica de Bogota, among others.

As one of the most gifted young conductors of his generation, Olivier Grangean conducted the Radio France Philharmonic Orchestra during the Polish composer Witold Lutoslawsky’s 80th anniversary celebrations and also accompanied Mstislav Rostropovich on Daniel Lesur’s Fantaisie Concertante for cello and orchestra at the Salle Pleyel in Paris.

While Living in Caracas between 1995 and 2000 Grangean established close ties with some of the most outstanding Latin American orchestras from Venezuela, Colombia, Mexico and other countries in the region, where he familiarized himself with composers such as Revueltas and Ginastera. He also contributed to the dissemination of French music and conducted some Latin American first performances of works by Dutilleux, Dukas and Ravel.

In 2002, Olivier Grangean was invited to the Forbidden City where he conducted the Beijing Symphony Orchestra .
Upon his return to Europe he worked regularly with the Lithuanian National Symphony Orchestra in Vilnius where he conducted Henri Dutilleux’s 2nd symphony. Subsequently he undertook a tour of the major concert halls in Germany (Alte Oper in Frankfurt and others), once again with Mstislav Rostropovich.
For the Südwestrundfunk  he recorded a French music program (Dukas and Dutilleux) with the Stuttgart Radio Symphony Orchestra.
In Belgrade, he took charge of the world premiere of “Mandragola” (2009), the opera by the Serbian composer Ivan Jevtic (Opera-Theater Madlenianum).
In the last few years, Olivier Grangean participated in cooperation projects, in particular with the Ho Chi Minh City Symphony Orchestra, the Orchestre Symphonique National d’Algérie, and more recently in Russia with the Togliatti Symphony Orchestra and the Nijni Novgorod Philharmonic.

Olivier Grangean is presently the chief conductor of the Orquesta Sinfonica Nacional de Colombia and maintains a close relationship with the Lithuanian National Symphony Orchestra.