Ricky Lynn Waddell is a retired lieutenant general in the United States Army Reserve who served as a Deputy National Security Advisor to President Donald Trump from 2017 to 2018 and as the Assistant to the Chairman of the Joint Chiefs of Staff from 2018 to 2021. His promotion to lieutenant general was authorized by the United States Senate on 26 September 2019. He retired from active military service in October 2021.

The United States Deputy National Security Advisor is a member of the Executive Office of the President of the United States and the United States National Security Council, serving under the President's National Security Advisor.