Born in Seoul, South Korea, Liwanag grew up traveling around the world as a military family member. He enlisted in the Texas Army National Guard in 1979 and served as a rifleman in the 36th Airborne Brigade. He volunteered and served as a scout and radio operator in Company G (Ranger) (Long-Range Reconnaissance Patrol), 143rd Infantry.
A 1982 distinguished military graduate of the Corps of Cadets at Texas A&M
University, Liwanag received a commission as an infantry officer and served as the scout platoon leader, Combat Support Company, and Headquarters Executive Officer for the 1st Battalion, 9th Infantry (Manchu), 2nd Infantry Division in Korea.
LTC Liwanag became Special Forces qualified in 1984 and served as the Executive Officer for Company C, 1st Special Warfare Training Battalion, and as safety officer of the Military Free Fall School, U.S. Army John F. Kennedy Special Warfare Center. Liwanag is a military free fall instructor and the author of the 1988 edition of Field Manual 31-19, Special Forces Military Free Fall Parachuting.
His commands include a Regional Survey Team and a Special Forces Military Free Fall A-Detachment in Okinawa, Japan; a Maritime Operations A-Detachment in Fort Lewis, Washington; and Company C, 1st Battalion, 1st Special Forces Group in Okinawa.
Liwanag has served as an operations, plans, and training officer for 1st and 2nd Battalions of the 1st Special Forces Group; the U.S. Army Special Operations Detachment; the Joint Intelligence Coordinating Staff (with duty at The Joint Staff); the U.S. Army Office of Military Support; and Task Force 20.
His assignments have taken him on exercises and operations throughout Asia, Europe, North Africa, the Middle East, the Caribbean, and Australia. He is a veteran of Operations Uphold Democracy and Iraqi Freedom. Liwanag is a graduate of the Command and General Staff Officer's Course; the Special Forces Advance Reconnaissance, Target Analysis and Exploitation Techniques Course; the Drug Enforcement Administration Advance Narcotics Raids Tactics Course; the Sniper/Counter-Sniper Course; the Special Threats Management Course and he is a U.S. Secret Service Firearms instructor as well as a U.S. Army Distinguished Rifleman.
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