Dr. Shahin obtained a Bachelor of Dental Surgery from King Abdulaziz University College of Dentistry in 2007. Later on, he completed his residency and doctoral degree in Boston, USA earning him a Certificate of Advanced Graduate Studies (CAGS) and a Doctorate of Science Degree (DScD) in orthodontics and dentofacial orthopedics from Boston University Henry M. Goldman School of Dental Medicine, USA. He has a Fellowship in Surgical and Craniofacial Orthodontics from Case Western Reserve University School of Dental Medicine, USA. Dr. Shahin is a Fellow of the Royal College of Dentists of Canada in orthodontics and a Diplomate of the American Board of Orthodontics. He is actively involved in lecturing nationally and internationally mostly on clear aligners.

Currently, Dr. Shahin is an Assistant Professor in Orthodontics at the Imam Abdulrahman Bin Faisal University at the College of Dentistry. Dr. Shahin maintains a practice mostly dedicated to clear aligner therapy using Invisalign with emphasis on multidisciplinary treatment. His research interests are on clear aligner therapy, cleft lip and palate and CBCT superimposition.