Tijmen Graat transferred from the juniors to Team Visma | Lease a Bike Development in 2022. During his first two years with the team, he established himself with victories in the Istrian Spring Trophy, GP Palio del Recioto, and the Eurode Omloop. In 2023, he signed an agreement with the World Tour team, effective from 2025. Graat has proven himself deserving of a spot on the World Tour team; in 2024, he showcased his talent by finishing third in the overall classification at the prestigious youngster race, the Tour de l'Avenir, and securing the mountain classification.