Sierk joined BioNTech in September 2014 from Novartis, where he served as Vice President and CFO for the Sandoz Division in North America, a USD 3 billion business. Sierk Poetting joined Novartis in 2006, covering a broad range of responsibilities, such as integrating several acquired companies (approx. USD 10 billion deal value), supporting the execution of numerous M&A and licensing deals, implementing a Finance Service Center via outsourcing/offshoring, setting up controlling and planning processes in various Sandoz countries and business units, leading facility management, IT and purchasing organizations. Sierk started his career as a consultant with McKinsey & Company, where he advised senior management teams in the health care industry on strategic and operational issues. A German citizen, Sierk holds a Master of Science in Optical Sciences from the University of Arizona (US) and a PhD in Physics from the Ludwig-Maximilians University in Munich (Germany).