Dr Kessler belongs to a number of professional societies, including the American Society of Hematology, the International Society on Thrombosis and Haemostasis, the World Federation of Hemophilia, and the Hemostasis and Thrombosis Research Society of North America (HTRS). He sits on several medical and scientific advisory boards. He is also the immediate past-Editor of the journal Haemophilia and serves as a reviewer for numerous other journals, including Blood, the Journal of the American Medical Association, Thrombosis and Haemostasis, the American Journal of Hematology,
and the Journal of Thrombosis and Haemostasis. Dr Kessler is a prolific author, and has over 250 peer reviewed published articles, and multiple books and book chapters in the field of bleeding disorders and their treatment. He has been elected to Mastership in the American College of Physicians and is immediate past Chair of the Medical and Scientific Advisory Council for the National
Hemophilia Foundation. He serves on the Madical and Scientific Advisory Council for the Platelet Disorders Support Association.