Having completed specialization in Psychiatry, Dr Gurdeep S Grewal was attached to the Malacca General Hospital and now currently practices at the Department of Psychiatry and Mental Health in Hospital Tengku Ampuan Rahimah, Klang.

Dr Gurdeep S Grewal also developed an interest in occupational health and is a certified trainer, registered with the Human Resource Development Fund (HRDF) which is under the auspices of the Ministry of Human Resources.