Claus has eighteen years of experience in working in the pharmaceutical industry. He has held senior roles on both local and global level in various multinational companies, such as GSK, Wyeth and AstraZeneca. In his career, he has been responsible for a broad span of functions, including Commercial, Pricing & Market Access, Communications, Governmental Affairs as well as Patient Advocacy. He has also led a large Business Unit in the field of respiratory and infectious diseases.

Claus is a pharmacist and health economist by training and holds a Ph.D. from the Humboldt University in Berlin. He served as one of the editors of the European Journal of Health Economics from 2006-2017, helping it to become a renowned journal in the field. He has published numerous articles in high impact journals, with a focus on health economics and quality of life research.