He obtained his MD degree from Dhaka University and PhD in Molecular Biology and Biochemistry from Nagoya University, Japan. Ruhul joined Dr. Aird"s lab at BIDMC as a post-doctoral fellow in 1999 and was promoted to the position of Instructor in Medicine in 2002. Ruhul was promoted to Assistant Professor of Medicine, Harvard Medical School in 2006 and became a member of the CVBR.