Having completed his MBBS, Dr. Sanaullah Junejo started his postgraduate training for FCPS in Cardiac Surgery at National Institute of Caradiovascular Diseases (NICVD) Karachi in 2011 and continued there for three years, once finalizing training of FCPS from NICVD, Dr. Sanaullah Junejo joined cardiac surgery team at South City Hospital with Professor Shahid Sami as Associate Cardiac Surgeon, since 2014 till continue.

Dr. Sanaullah Junejo achieved his FCPS in Cardiac Surgery from College of Physicians and Surgeons of Pakistan (CPSP) in 2016 and working as Assistant Professor of Cardiac Surgery at Dow University of Health Sciences Karachi since 2018.
His research interests are Coronary artery bypass Surgery and its different modalities like total arterial grafting, radial artery and off pump surgery.