Balaji Sadasivan was a Singaporean politician and neurosurgeon. He attended Raffles Institution, Siglap Secondary School and National Junior College, and studied medicine at the University of Singapore. After graduating in 1979, he continued his education at the Royal College of Physicians and Surgeons of Glasgow, becoming a Fellow of the Royal College of Surgeons (FRCS) in 1984. He also trained at the Henry Ford Hospital in Detroit, Michigan, from 1985 to 1989, and became a Fellow of Harvard University in 1990. He worked as a neurosurgeon until 2001, publishing over 50 book chapters and journal articles.