On 1 June 2020, Vermeersch was promoted from the team's under-23 development squad. Formerly, Vermeersch competed in cyclo-cross, in which he was highly successful.[5] While being a professional cyclist, he is studying history at Ghent University.[6]
In 2021, he placed third in the UCI Road World Under–23 men's time trial. At the 2021 Paris–Roubaix race, which had been postponed from April due to the COVID-19 pandemic, he got into the early breakaway of around 30 riders and ultimately finished second to Sonny Colbrelli and ahead of Mathieu van der Poel in a three-man sprint in the velodrome.[7]
2024
Vermeersch sustained a broken femur in a crash during his first race of 2024 at the Vuelta a Murcia on February 10. The accident occurred on the descent of Alto Collado Bermejo, and forced him to miss the Spring Classics.[8]
On April 24, it was announced that Vermeersch is set to join UAE Team Emirates on a multi-year contract beginning from the 2025 season. The official signing is pending due to UCI transfer regulations.[9]