Dr Stef Calladine graduated from Leeds University and subsequently moved to London to complete her Vocational Training. After this, she secured Senior House Officer positions in Oral and Maxillofacial Surgery at St George Hospital, London and Wythenshaw Hospital.

On moving to Australia in 2009, Dr Calladine was appointed as a Lecturer in Oral Surgery at Sydney University and has been actively involved in both undergraduate and post-graduate teaching since. Currently Dr Calladine is working with dental students at Charles Sturt University.

Dr Calladine is the owner of Oral Surgery Ourimbah and operates across a number of both private and public hospitals including Brisbane Waters Private Hospital, Tuggerah Lakes Private Hospital, Calvary Riverina Hospital Surgicentre and Wagga Wagga Base Hospital.

Dr Calladine is a member of the Royal Australasian College of Dental Surgeons as well as the Royal College of Surgeons of England, and is a member of the Australian Dental Association, holding the presidency position in the Southern Division.