He has more than 39 years of experience. He practices medicine at Fortis. Some of the places where Dr. Ajay Mittal has worked in the past include Narinder Mohan Hospital and Heart Centre, Narinder Mohan Hospital and Heart Centre, Hindu Rao Hospital, Lady Harding Medical College and University. Besides being affiliated with many hospitals, he has been professionally active in other important ways. He has been an active member of Delhi Medical Council, Fellow of Cardiological Society of India. He earned his MBBS from University of Delhi,. He also has a MD from University of Delhi, and MD - Medicine and Surgery from University of Delhi.