John Marshall is a Professor of Surgery at the University of Toronto, an intensivist at St. Michael’s Hospital, and a Senior Investigator in the Keenan Research Centre for Biomedical Science. His academic interests lie in the area of sepsis and life-threatening infection, trauma, and the host innate immune response to these. He has published more than 460 manuscripts and book chapters, and has been cited more than 96,000 times. He is the founding chair of the International Forum of Acute Care Trialists (InFACT) – a global network of 36 investigator-led critical care clinical research groups, vice-chair of the International Severe Acute Respiratory and Emerging Infections Consortium, and a member of the Executive Committee of the Global Sepsis Alliance. He is past-chair of the International Sepsis Forum, past-President of the Surgical Infection Society, past Secretary-General of the World Federation of Societies of Intensive and Critical Care Medicine, and past-chair of the Canadian Critical Care Trials Group. He has given more than 1200 invited lectures at more than 500 meetings around the world, and is an Associate Editor of the journals Critical Care Medicine and Critical Care.