Open access. Medical education leaders are important for educational quality in postgraduate medical education. Their work tasks are complex and contain different components. However, factors that are influencing leaders´ effectiveness in completing these tasks are unexplored. Understanding and developing these factors is most likely essential to strengthen postgraduate medical education and to consequently improve the quality in health care delivery. This study explores the experiences of factors that influence effectiveness of clinical consultants responsible for postgraduate medical education at clinical departments. Effectiveness was defined as fulfillment of work tasks.