He made his professional debut in 2022 and won the
Tour de l'Avenir.[4] He made headlines at the
2023 Vuelta a Espana where he finished eighth overall in his grand tour debut. In December 2023 he signed for
Team Jumbo–Visma on a four year deal until 2027, but his current team,
Bora–Hansgrohe, would dispute this, saying that he was contracted through 2024 with the team.[5] Eventually, the parties reached an agreement[6] for Cian to ride with
Visma–Lease a Bike in 2024.