For over 10 years, he has been the staff physician in the Minor Fracture Clinic at North York General Hospital, a weekly clinic designed to look after patients with non-operative fractures and acute MSK injuries. In 2008, Arun created CASTED - The 'Hands-on' ED Orthopedics Course. Since then, CASTED has presented over 200 times across the country. He has won over a dozen teaching awards at local, university and national levels. An Associate Professor with the Department of Family and Community Medicine at University of Toronto, he remains active in the emergency department, the fracture clinic and presenting CASTED courses.