N Chandrasekaran became the CEO of Tata Consultancy Services in 2017 and has served in that role since. Ratan Tata was the Chairman of Tata Sons (not TCS CEO), S Ramadorai was a former CEO (1996-2009), and S Mahalingam was CFO and COO. Chandrasekaran later became Chairman of Tata Sons in 2022 but remains an important figure in TCS history.