Lotto–Soudal (2015–19) Benoot turned professional with the Belgian
UCI World Tour team in 2015, after riding for the outfit in 2013 and 2014, and riding some races as a
stagiaire in autumn 2014. Benoot made an instant impact in the professional ranks by placing fifth in his first
Tour of Flanders. Later in the season he showed his abilities in stage races, finishing second overall behind
Greg Van Avermaet at the
2015 Tour of Belgium. In June 2017, he was named in the startlist for the
2017 Tour de France. Benoot finished 20th overall in his first
Grand Tour. Benoot won his first professional race in March 2018, soloing to victory in the
UCI World Tour's
Strade Bianche in torrential rain after attacking from a chasing group to catch leaders
Romain Bardet () and
Wout van Aert () before dropping them in the final sector of dirt roads. Benoot soloed to victory by 39 seconds ahead of Bardet. In August 2018, he was named in the startlist for the
2018 Vuelta a España.
Team Sunweb (2020–21) In August 2019, Benoot signed an initial two-year deal with starting from 2020. Following the
COVID-19 pandemic-enforced suspension of racing, Benoot took top-ten finishes at
Liège–Bastogne–Liège (eighth) and the
Tour of Flanders (tenth). He also extended his contract with the team until the end of the 2022 season in August 2020. Benoot took no wins in 2021, with a best result of fifth overall at
Paris–Nice.
Team Jumbo–Visma In December 2021, Benoot was released from his contract a year early, and subsequently signed a two-year deal with starting from 2022. He made his first start with the team at February's
Omloop Het Nieuwsblad, and recorded his first top-ten finish with ninth at the
E3 Saxo Bank Classic the following month. He finished second at
Dwars door Vlaanderen, having attacked the lead group in the final two kilometres, before being out-sprinted by
Mathieu van der Poel at the finish in
Waregem. With team leader
Wout van Aert sidelined due to
COVID-19, Benoot shared team leadership of for the following weekend's
Tour of Flanders, with
Christophe Laporte; Laporte finished ninth while Benoot was thirteenth. The following weekend, Benoot finished third in the
Amstel Gold Race, having attacked from the main group in the final kilometre of the race. Team Jumbo-Visma had a historic performance in the
2022 Tour de France. Benoot played a key role supporting the team leaders, especially as injuries and abandons took their toll throughout the race.{{cite web|url=https://www.eurosport.com/cycling/tour-de-france/2022/jumbo-visma-s-steven-kruijswijk-out-of-tour-de-france-after-suffering-horror-shoulder-injury_sto9040679/story.shtml ==Personal life==