Dr Ratneser had a strong desire to work in health, which led him to study dentistry at the University of Adelaide. He completed his dentistry degree in 1998. After a brief stint working as a dentist in Perth he caught the travel bug and moved to the UK to work in private practice with an emphasis on children's dentistry.
In 2007 Sanj returned to Australia to undertake specialist training in Orthodontics at the University of Melbourne. He was awarded the 2010 John McDonald award by the Royal College of Surgeons in Edinburgh. This is one of the world's most prestigious awards in orthodontics.
He was also awarded the 2010 Elsdon Storey research award by the Australian Society of Orthodontists for his research on dental decay around braces.
When not busily straightening teeth Dr Ratneser is a big fan of all things beach. He is an avid diver, golfer, snow boarder and cricketer.