She is a staff psychiatrist at the Women's Health Concerns Clinic and the Mood Disorders Clinic at St. Joseph's Healthcare. She completed her medical and psychiatry residency training at the University of Manitoba. She completed a fellowship in reproductive psychiatry, cognitive behavioural therapy (mood and anxiety disorders), and interpersonal psychotherapy at McMaster University. Dr. Gunasekera is actively involved in teaching obstetrics and gynecology residents as well as family medicine residents.