C. D. Sahay is a retired IPS officer who served as the chief of Research and Analysis Wing, India's external intelligence agency, from 1 April 2003 to 31 January 2005.
He was a member of the team set up by the Government to negotiate with the hijackers of Indian Airlines aircraft IC 814 in December 1999.
From 2000 to 2003, he was a Special Secretary in R&AW in charge of the division responsible for analysis and operations relating to Pakistan and other Islamic countries.
He was also involved in negotiations centered on the Hizb-ul-Mujahideen's abortive ceasefire in July 2000.
He inaugurated the present headquarters of the agency in Lodi Road, Delhi.