Prof Bajaj qualified from University of Delhi, India (1993) and completed his postgraduate training in E.N.T. before moving to the UK in 2000. He trained as a Senior Registrar in Yorkshire. He was awarded MD (Clinical Research) from University College London in 2007 while working at Great Ormond Street Hospital for 24 months. He was awarded FRCS in E.N.T from Royal College of Surgeons in 2009. He underwent further sub-specialist training in all aspects of Paediatric ENT for another 12 months at Great Ormond Street Hospital, London.
Prof Bajaj has active interest in teaching and research. He has published more than 50 articles in international journals and presented more than 100 papers at international and national meetings.