Wojtek Wiercioch is an assistant professor and director of the McMaster GRADE Centre in the Department of Health Research Methods, Evidence, and Impact, at McMaster University, Hamilton, Canada. As a research methodologist, he specializes in evidence synthesis, guideline development methodology, and the guideline development process. His main research activities include the development of clinical practice guidelines and systematic reviews in collaboration with various medical professional societies, healthcare organizations and ministries of health, as well as the development and evaluation of guideline methods. He is a member of the GRADE working group, the Guidelines International Network, and the INGUIDE Program, in which he participates in teaching systematic review and guideline methods.