COL Landers was raised in Camden, Arkansas. In 1992, he graduated from Ouachita Baptist University as a Distinguished Military Graduate in Arkadelphia, Arkansas, with a Bachelor of Science degree in Chemistry and Biology, and was commissioned a Second Lieutenant (2LT) through the Reserve Officers Training Corps (ROTC) program. He received his Doctor of Medicine degree from Tulane University School of Medicine in New Orleans, Louisiana, in 1996. He then completed a Family Medicine Residency at Tripler Army Medical Center, Honolulu, Hawaii, in 1999 and became board certified the same year. He followed his medical specialty training with a utilization tour at Fort Leavenworth, Kansas, from 1999-2002. There he served as a full-service Family Medicine Physician.
In 2002, COL Landers was assigned to Womack Army Medical Center (WAMC), Fort Bragg, North Carolina, and served as the Officer in Charge (OIC) of the WAMC Family Medicine Residency Clinic, Residency Faculty Instructor, and full-service Family Medicine Physician. From 2005-2006, he served as the OIC of Clark Health Clinic at Fort Bragg, North Carolina. In June 2006, COL Landers was assigned to the 1-325th Airborne Infantry Regiment (AIR), 82nd Airborne Division and deployed to Iraq in support of Operation Iraqi Freedom (OIF).
From 2007-2009, COL Landers was assigned as the Group Surgeon for 7th Special Forces Group (Airborne). COL Landers deployed in support of OIF, 2006 and 2007, and Operation Enduring Freedom (OEF) in 2007, 2008, 2009, and 2012. COL Landers served as the Command Surgeon for the U.S. Army Special Forces Command (Airborne) (USASFC (A)) from 2009-2012. From 2012-2014 he was assigned as the Deputy Commanding Officer for the Special Warfare Medical Group (Airborne), U.S. Army John F. Kennedy Special Warfare Center and School. He then served as the Commander of the Special Warfare Medical Group from 2014-2016. COL Landers served as the Command Surgeon for Special Operations Command Central from 2016-2017. In 2018, he graduated from the United States Army War College (USAWC), earning a Master’s degree in Strategic Studies.
COL Andrew L. Landers was assigned as the Supervisory Assistant Deputy, Health Affairs for ASA-M&RA. Before starting this position, he commanded the 549th Hospital Center and the Brian D. Allgood Army Community Hospital at Camp Humphreys, Republic of Korea.
COL Landers' awards and decorations include Legion of Merit with oak leaf cluster, Bronze Star Medal with oak leaf cluster, Defense Meritorious Service Medal with oak-leaf cluster, Meritorious Service Medal with four oak leaf clusters, Joint Service Commendation Medal, Army Commendation Medal with three oak leaf clusters, Army Commendation Medal with "V" device, Army Achievement Medal with three oak leaf clusters, Joint Meritorious Unit Award with oak leaf cluster, Valorous Unit Award, Army Superior Unit Award, National Defense Service Medal with bronze star, Iraq Campaign Medal with two campaign stars, Afghanistan Campaign Medal with two campaign stars, Global War On Terrorism Support Medal, Korea Defense Service Medal, Armed Forces Service Medal, Humanitarian Service Medal, Army Service Ribbon, Overseas Service Ribbon with numeral 2, NATO Medal, Combat Medic Badge, Flight Surgeon Badge, Parachutist Badge.