Colonel Federico Lopez III was commissioned an Infantry Officer upon graduation from Officer Candidate School 17 February 1963. His first duty assignment was as an Infantry Platoon leader, Company A, 4th Battalion, 144th Infantry. | His subsequent duty assignments include: Rifle Platoon Leader, Company B, 2d Battalion, 141st Infantry; Company Executive Officer, A Company, 4th Battalion, 144th Infantry; Anti-Tank Platoon Leader, Headquarters and Headquarters Company, 4th Battalion, 144th Infantry; Reconnaisance Platoon Leader, Headquarters and Headquarters Company, 3d Battalion, 141st Infantry; Communications Officer, Headquarters, 3d Battalion, 141st Infantry; Battalion S-4, Headquarters, 3d Battalion, 141st Infantry; Battalion S-1, Headquarters, 3d Battalion, 141st Infantry; Company Commander, Company A, 2d Battalion, 141st Infantry; Battalion S-3, Headquarters, 3d Battalion, 141st Infantry; Battalion Executive Officer, Headquarters 3d Battalion, 141st Infantry; Battalion S-3, Headquarters, 2d Battalion, 141st Infantry; Battalion Executive Officer, Headquarters, 2d Battalion, 141st Infantry; Battalion Commander, 3d Battalion, 141st Infantry, Plans, Operations, Military Support Officer, Headquarters State Area Command (STARC); Executive Officer, Detachment 1, Headquarters (STARC); Brigade Executive Officer, 2d Brigade, 49th Armored Division; Brigade Commander, 2d Brigade, 49th Armored Division. | Colonel Lopez served as the Assistant Division Commander, Maneuver, 49th Armored Division, Texas Army National Guard, Austin, Texas, prior to his retirement.