Joseph Devereux Kernan (born February 4, 1955) is a retired United States Navy vice admiral and the former under secretary of defense for intelligence, United States Southern Command (USSOUTHCOM), Miami, Florida from May 23, 2011 to September 2013. He was the second-in-command of one of nine unified commands under the Department of Defense. Kernan was nominated as the fifth USD(I) on July 17, 2017, was confirmed by the Senate on November 17, 2017, and served until November 10, 2020, when Ezra Cohen-Watnick replaced him as acting Undersecretary for Intelligence.