Frank made his debut in the Telemark World Cup on December 1, 2017 in Hintertux . He scored his first World Cup points with 24th place in the sprint. In the course of his first World Cup season , he was able to classify himself regularly in the points. In the end he was 24th in the overall World Cup. At the 2018 Telemark Junior World Championships in Mürren , he won the silver medal in the mixed team parallel sprint. In the individual competitions, reaching the round of 16 in the parallel sprint was his best result.