Dr. Mahmood is certified in Cardio-Oncology (ICOS), Heart Failure (HFSA) and Cardiovascular Diseases (ABIM). He is the System Director of Cardio-Oncology at Catholic Health. His Sub-specialty is in Cardio-Oncology. He helps cancer patients tolerate cardiac side effects of life-prolonging cancer therapy such as heart failure, ischemia, and arrhythmias, as well as optimizing the heart health of cancer survivors. He completed internal medicine residency at Massachusetts General Hospital (MGH), Harvard Medical School, and his cardiovascular disease fellowship at Weill Cornell Medicine. He also completed a subspecialty fellowship in Cardio-Oncology at Brigham and Women's Hospital and MGH, Harvard Medical School. He is a graduate of Case Western medical school.