Fort Huachuca, Arizona - The U.S. Army Information Systems Engineering Command (ISEC), a subordinate unit of the U.S. Army Communications-Electronics Command (CECOM), welcomed Command Sgt. Maj. Jason D. McCoy in a ceremony on the Fort Huachuca grounds, May 21, 2019.McCoy replaced outgoing Command Sgt. Maj. Dexter M. Manning.The Change of Responsibility ceremony is a tradition that marks the transfer of responsibility for the accomplishments of the unit and the welfare of its Soldiers and their families from the outgoing to the incoming senior non-commissioned officer of the organization. ISEC Commander Col. Nicole R. Morris presided over the ceremony, which occurred at the Greely Hall flagpole on the Fort Huachuca installation. McCoy is a 29-year veteran of the Army and arrived at ISEC after completing his most recent tour at the 40th Expeditionary Signal Battalion, also located at Fort Huachuca.Manning, a 30-year veteran of the Army, completed his 18-month tour as ISEC CSM and is moving on to retirement in South Carolina. Manning was ISEC's CSM from October 2017 to May 2019.The summer season of change at ISEC will continue later this month when Morris relinquishes her command of ISEC to incoming commander, Col. Osvaldo Ortiz. Ortiz recently completed a tour as executive officer to the CECOM commanding general at Aberdeen Proving Ground, Maryland.ISEC is one of five subordinate elements of CECOM and securely replaces legacy communication systems and modernizes information technology and infrastructure on post, camps and stations across the Army and the Nation.