Alexandre Gattet was seven years old when he began studying oboe in Albi in the Tarn region. After winning a gold medal at the Toulouse Conservatory at the age of fourteen, he entered the Paris Conservatoire National Supérieur de Musique in the classes of Jean Louis Capezzali, David Walter, and Jacques Tys, where he obtained in 1998 and 1999 unanimous first prizes in oboe and chamber music.

First prize winner at the international "Gillet" Competition (USA-1999) and the Tokyo International Competition (2000), he became, in September 2002, laureate of the prestigious ARD Competition in Munich. He was chosen by Christoph Eschenbach in December 2000 to become principal oboe of the Orchestre de Paris, where he has seen the greatest conductors succeed one another, from Paavo Järvi to Daniel Harding, including Pierre Boulez, Zubin Mehta, Riccardo Chailly, Valery Gergiev, Esa-Pekka Salonen, Klaus Mäkelä, among many others.

He is also invited to perform as solo oboe with the most prestigious orchestras (Berlin Philharmonic, Royal Concertgebouw Orchestra Amsterdam, Budapest Festival Orchestra, Bavarian Radio Symphony Orchestra, Mahler Chamber Orchestra...).

A member of Les Dissonances (David Grimal) since their creation, he has recorded with this extraordinary collective the Mozart concerto as well as the complete Brahms and Beethoven Symphonies without a conductor.

He recorded for the Indesens label Henri Dutilleux's sonata and participated in the critically acclaimed complete recordings of chamber music for winds by Robert Schumann, Francis Poulenc, and Camille Saint-Saëns, the latter having been nominated as Recording of the Year at the Victoires de la Musique 2011. In 2022, his first solo album was released in the "Paris 1900" collection.

Alexandre Gattet has been teaching oboe since 2021 at the Conservatoire National Supérieur de Musique et de Danse de Lyon.