Born (1999) and raised in Verbier, Switzerland, Sybille's parents cultivated her deep-rooted passion for the mountains from a tender age. When she reached the age of 12, she faced a pivotal decision, as she was offered the opportunity to pursue her skiing journey within the structured framework of the regional alpine ski racing program. However, at the same time, a new freeride program emerged in Verbier. Sybille's choice to dedicate herself to freeriding undoubtedly proved to be a wise one. Her commitment and talent culminated in a victory, as she earned the 1st place at the Xtreme Verbier during the FWT22. Verbier native, competing at home, surrounded by her loved ones, was a cherished dream for Sybille.

Her exceptional achievements in her young career showcase her mastery and determination: 1st place - XTreme Verbier Freeride World Tour 2022, 2nd place overall - Freeride World Challenger 2023, 3rd place - Baqueira Beret Freeride World Tour 2023. In addition to her flourishing professional skiing career, Blanjean is also pursuing a degree in physiotherapy, showcasing her dedication to both her academic and athletic pursuits.