He has many years of experience in the pharmaceutical sector. Maciej Wieczorek has held managerial positions in pharmaceutical companies, where his responsibilities included i.a. development of product strategies, as well as research and development of new formulations. In 2002 he created from scratch a modern and dynamically developing research and development company – Celon Pharma S.A. He is the author of several patents used in the pharmaceutical sector, as well as of successful implementations of drugs. He currently also holds managerial functions in other bio-pharmaceutical entities, e.g.: Mabion S.A., i.e. a Polish public company developing technologies for the creation of monoclonal antibodies. He graduated from the Department of Mechanical Technology at the Warsaw University of Technology, the Industry Organisation and Management faculty. In 1999 he graduated from management studies run under the Warsaw Executive MBO programme, organised jointly by the Warsaw School of Economics and the University of Minnesota (USA). In 2008 he received the title of Doctor of Medicine at the Medical University of Łódź (in the field of medical biology).