Professor Clarke has been a consultant orthopaedic surgeon for over 20 years and specializes in paediatric orthopaedics. He is the co-founder of the International Hip Dysplasia Institute and a member of several influential-working groups. He has widely published in leading peer-reviewed international journals and has given lectures to an international audience. He has published over 100 papers published in leading peer-reviewed academic journals on all aspects of paediatric orthopaedics.