1989
Fellowship in Paediatric Cardiovascular Surgery, Children’s Hospital (affiliated to Harvard Medical School) Boston, USA.
1989-1991
Fellowship in Paeditric Cardiovascular Surgery
Marry Ann Knight Hospital for Children Miami, USA.
1991-1995 Assistant Professor
Department of Cardiothoracic and Vascular – Surgery, All India Institute of Medical Sciences, New Delhi.
1995-1999 Associate Professor
Department of Cardiothoracic and Vascular Surgery, All India Institute of Medical Sciences, New Delhi.
1999-2001 Additional Professor
Department of Cardiothoracic and Vascular Surgery, All India Institute of Medical Sciences, New Delhi.
2001-2007 Senior Consultant Cardiac Surgeon
Department of Cardiac Surgery, Narayana Hrudayalaya, Bangalore.
2007-2014 Director & Head Paediatric Cardiac Surgery
Department of Pediatric Cardiac Surgery, Fortis Escorts Heart Institute and Research Centre, New Delhi.
2014- Director - Paediatric Cardiac Surgery
Department of Pediatric Cardiac Surgery, Jaypee Hospital Noida, UP, India.
2021- Senior Consultant Paediatric Cardiac Surgery, Indraprastha Apollo Hospitals, Delhi.