Born in Vöcklabruck, Pöstlberger was named in the start list for the 2017 Giro d'Italia[7] and won the opening stage,[8] becoming the first Austrian rider to win a stage of the Giro[9] and the first Austrian to lead the race.[10] In July 2018, he was named in the start list for the 2018 Tour de France.[11]