Yonca Kumsar

Chief Transformation Officer

Yonca Kumsar is Chief Transformation Officer at group.one, working closely with our CEO, Commercial Leads and the Board to implement our Digital Staircase Strategy and execute on key strategic projects. With over a decade of global experience, she is an expert in transformation, international expansion and digital business. 

Before joining group.one, Yonca was Head of Expansion and Chief of Staff at Trendyol Group (Alibaba) and gained vital experience at McKinsey & Company in New York, specializing in business transformation and digital growth.
Yonca holds a degree in Industrial Engineering and an MBA from Harvard Business School.