She has worked in the field of stress management for emergency responders, families in crisis situations and the First Nation Akwesasne conflict. She volunteered with Doctors Without Borders. As the lead physician, she set up the first primary healthcare team serving the Inuit in Ottawa. Dr. Gambhir has served on many boards and is currently part of the Emergency Spiritual Care Team of Ottawa Hospital (ESCAT). She has also done extensive volunteer work with the Indo-Canadian Community.