Mr Sethi qualified at University College London Medical School. He then went on to complete his specialist orthopaedic training at Oswestry and Birmingham. Mr Sethi completed specialist fellowship training in Australia pursuing his specialist interest in knee sports injuries. Prior to that he completed specialist fellowship training in the UK focusing on sports injuries and joint replacement surgery. Mr Sethi's interests cover the range of knee surgery including arthroscopic anterior and posterior cruciate ligament reconstruction for the unstable knee, repair of a torn meniscus, surgery for patello-femoral problems, through to osteotomy and joint replacement for the worn arthritic knee. Within joint replacement surgery Mr Sethi carries out both partial and total knee replacements. Mr Sethi is also actively involved with research and teaching both nationally and internationally. He collects data on the outcome of his surgery and registers his patients on the National Ligament Registry dedicated to analysing and improving the outcome of Cruciate ligament reconstruction. Mr Sethi holds the current membership(s) of professional, national and regional bodies, Royal College of Surgeons of England, British Orthopaedic Association (BOA), British Association for Surgery of the Knee (BASK), British Orthopaedic Sports Trauma and Arthroscopy Association (BOSTAA), The Royal Society of Medicine (RSM) and the General Medical Council (GMC). Mr Sethi has published research papers in respected peer review journals and presented papers nationally and internationally.
Mr Sethi has delivered lectures on knee surgery to both post graduates and undergraduates. He was previously Honorary Clinical Teacher at University of Leicester Medical School.