Admiral Sushil Kumar Isaacs, PVSM, UYSM, AVSM, NM (died 27 November 2019) was an Indian Navy Admiral who served as Chief of Naval Staff (CNS) of the Indian Navy.

He ceased to use his surname of Isaacs[1] because it caused confusion with his brother, who shares the same initials and is also a naval officer.

Sushil Kumar assumed charge of the Indian Navy, as the 16th Chief of Naval Staff, on 30 December 1998.

During his tenure as CNS, He was the highest-decorated serving officer in the Indian Navy, and he retired on 29 December 2001.

[4] Kumar died on 27 November 2019 at the Indian Army Research and Referral Hospital, Delhi at the age of 79.