After studying media management, he started his career at ProSiebenSat.1 PULS 4 in 2005, initially in the Distribution & Reach Development department, later taking over the management of program research, program and trailer planning at PULS 4 as well as the broadcast planning of all sister stations. In 2014, he was appointed Deputy Program Director of PULS 4 and in 2015 Program Director and Member of the Executive Board of ProSiebenSat.1 PULS 4. Since 2017 he has been Managing Director and Head of Broadcasting at ATV and ATV2 and since January 2020 Thomas Gruber has been Chairman of the TELETEST working group. In April 2024, he and Bernhard Albrecht have jointly assumed the positions of Co-CEOs of the ProSiebenSat1. PULS 4 Group in Austria.