Dr Nayar graduated from Government Dental College in Calicut in Kerala, India in 1993. After completion of post-graduation degree (MDS) in Prosthodontics from Manipal University, India, he worked as a Prosthodontist in the Middle East before embarking on further specialist clinical training in the United Kingdom where he was awarded Specialty Memberships from the Royal College of Surgeons of Edinburgh (MRDRCS) and Royal College of Physicians and Surgeons of Glasgow (MRDRCPS). He subsequently was awarded a Fellowship of the Royal College of Surgeons of England (FDSRCS). During his specialist clinical training, he also embarked on a Research Master of Philosophy (MPhil) degree that was awarded in 2012. He was a Consultant in Restorative Dentistry and Oral rehabilitation and an Honorary Senior Clinical Lecturer/Hon. Consultant in the UK since 2009.  He moved to Canada in 2013.

He is the immediate Past President of the British Society of Prosthodontics. He is the President Elect of the American Academy of Maxillofacial Prosthetics.  He is the also the President Elect, Trustee and interim Hon. Web Editor of the European Prosthodontic Association.   He was an examiner for the Dental Membership exam (MJDF) of the Royal College of Surgeons of England and for the Overseas Registration Examination (ORE) conducted by the General Dental Council (GDC) of the United Kingdom from 2007 - 2013.  He was also the Regional Advisor in Restorative Dentistry for the Royal College of Surgeons of England from 2010 to 2013. 

His current research interests include patient-reported outcome measures and improving quality of life in head and neck cancer patients, the use of digital technologies and additive manufacturing in advanced jaw reconstruction and maxillofacial prosthodontics, development of a virtual reality planning and educational software, among others.