Originally from Larchmont, New York, Rear Adm. Andrew Lennon graduated with distinction from the U.S. Naval Academy with a degree in mathematics. Following nuclear power training, he served in the engineering department of USS Daniel Webster (SSBN 626) during its final two patrols and participated in its nuclear refueling overhaul.
While assigned to submarine reserve detachments, he gained experience in force protection, guided missile submarine operations and diesel boats. As a member of submarine advisory teams, he served at sea aboard carriers and a destroyer coordinating submarine operations with naval battle groups.
Lennon directed operations during a joint military exercise in Ukraine while serving with 6th Fleet, and he led civil-military discussions in Estonia supporting research into countering hybrid threats while assigned to NATO Allied Command for Transformation.
In support of Naval Forces Africa, he supervised the historic first visit of an Algerian naval ship to America. Later in Algiers, he continued to develop the working relationship between the U.S. and Algerian militaries. Additionally he was director of a multinational exercise in Senegal where he oversaw the training of African naval forces in counter trafficking and counter illegal fishing operations.
Lennon has commanded five reserve detachments and served as director, Submarine Force Reserve Component. He has earned master's degrees from Johns Hopkins University and The George Washington University.
Currently Submarine Force reserve deputy commander, he leads 1,600 Sailors in 57 units who provide superior support for undersea warfare operations and submarine maintenance.