CHARLESTON, SC — The U.S. Army Corps of Engineers, Charleston District welcomed its 91st commander today at a change of command ceremony. Lieutenant Colonel Todd Mainwaring assumed command from Major Patrick Ripton during a ceremony officiated by Brigadier General Zachary Miller, commanding general, South Atlantic Division, USACE.
Lt. Col. Mainwaring brings more than 18 years of military leadership to the position. A seasoned member of the U.S. Army Corps of Engineers, he previously served as deputy commander of both the USACE Nashville District and the Huntsville Center. In those roles, he led efforts in team building, strategic recruitment, and talent development, while also supporting enterprise-wide planning and executive-level communications. Most recently, he served as deputy commander during the 2025 Los Angeles wildfires, supporting interagency response efforts.
Mainwaring holds a Bachelor of Science in Civil Engineering from the United States Military Academy and two Master of Science degrees from Stanford University. He received his commission in 2007 and later returned to West Point as a faculty member, teaching civil engineering from 2016 to 2019. His graduate studies focused on sustainable construction and energy-efficient building design—expertise he brings to the District’s complex civil works and military missions…