Ko Ko Oo began military service in the early 1990s. In June 2020, he was appointed as commander of the Central Military Command, headquartered in
Mandalay Region. He became one of the youngest officers to hold this post, which is a key regional command in Upper
Myanmar. In August 2023, he was promoted to
lieutenant general and reassigned to command BSO 1, a regional bureau covering
Mandalay,
Sagaing,
Magwe,
Chin, and
Kachin. He was later transferred to BSO 3, which oversees operations in central and western Myanmar. In these roles, he has supervised counterinsurgency operations and regional military coordination in areas affected by resistance movements. Prior to his senior postings, Ko Ko Oo reportedly served as a personal security officer to General
Maung Aye, former vice chairman of the
State Peace and Development Council (SPDC). == Battles and operations ==