Joseph Keith Kellogg Jr. (born May 12, 1944), known as Keith Kellogg, is a United States government official and a retired Lieutenant General in the United States Army. He currently serves as the National Security Advisor to Vice President Mike Pence. He previously served as the Executive Secretary and Chief of Staff of the United States National Security Council in the Trump administration. Notably, he served as National Security Advisor on an acting basis following the resignation of Michael T. Flynn.