Rajagopalan is a senior fellow at the Observer Research Foundation in New Delhi. From 2003 to 2007, she was an assistant director at India's National Security Council Secretariat. Previously, she was a research officer at the Institute of Defence Studies and Analyses in New Delhi. Her most recent book is Clashing Titans: Military Strategy and Insecurity Among Asian Great Powers. She received her doctorate in international relations from Jawaharlal Nehru University in 1999.