Concerts Colonne
In 1897, Barrère became an instructor at the Collège Stanislas in Montparnasse and held the position for seven years. In the same year, he was appointed a flutist in the Concerts Colonne, a major Paris orchestra, of which his former classmate from the conservatory, Pierre Monteux was a violist and later became assistant conductor. The orchestra toured Europe under trying conditions which was good practice for the young musician who later would tour extensively in the United States.