In 2017, aged 23, he won the Grand Prix at the 55th International Besançon Competition for Young Conductors.
Glassberg has served as associate guest conductor of the Orchestre National de Lyon.
[2] With the 2020-2021 season, Glassberg became music director of the Opéra de Rouen Normandie.
He became principal guest conductor of the Vienna Volksoper as of the 2022-2023 season,[3] and held this title through 31 December 2023.
[4][5] In September 2023, the Vienna Volksoper announced the appointment of Glassberg as its next music director, effective 1 January 2024.