Professor Kennedy is a leading liver specialist and his work in viral liver disease is known internationally. Trained at the University College in Dublin, he completed post-graduate training in London and was appointed as a Senior Lecturer at Barts and The London School of Medicine and Dentistry in 2009. He has produced novel work redefining the disease phase in Chronic Hepatitis B (CHB) and the main focus of his research work is around broadening treatment candidacy and the development of individualized treatment strategies for viral liver disease. He is widely published in the field; with over 200 publications and >90 peer-reviewed articles, in addition to multiple book chapters, he has also edited a textbook on Hepatogastroenterology.

Professor Kennedy is a Consultant Physician and Hepatologist with a special interest in the management of liver disease in young people. He works closely with premiership football clubs and manages liver disease in professional sports people and elite athletes from the UK and abroad. He is an expert advisor for the WHO and is part of the HBV clinical guideline development group, he is also a member of the European association for the study of the liver (EASL) HBV clinical practice guidelines and has served as a member for NICE on the viral hepatitis clinical guideline committee. He provides expert opinion for the United Kingdom Advisory Panel (UKAP) on blood-borne viruses and is the current chair of the British Viral Hepatitis Group and former Lead for the British Association for the Study of the Liver (BASL) HBV special interest group. He works closely with the industry and provides expert opinions on drug development programs.

He is the Chief/Principal Investigator for a number of investigator-led and commercial phase 1, 2 and 3, clinical trials of novel therapies in viral liver disease. At present, he leads studies on the development of novel therapies in HBV and hepatitis delta virus (HDV). In addition, he is passionate about patient education and ensuring patients play a central role in their own management. Professor Kennedy has developed HBV&Me, a management app, and a current area of his research is expanding the utility of patient management tools to improve care.