Dr. Hoan graduated from the National Military Medical University as general practitioner, Ph.D., and Specialist Doctor Level I specialized in General Internal Medicine.
- 1987 – 1988: he worked at the Army Medical Corps Department of the Ministry of Defense.
- 1990 – 2002: he worked at the Department of Internal Medicine at the National Military Hospital 108.
- 2003 – 2009: he became assistant head of the Department of Internal Medicine at the National Military Hospital 108.
- 2009 -2012: he worked as the assistant head of the Department of Health Care for Central Officers at the Central Military Hospital 108.
- 2012 – 2018: he held the title of assistant head of the Department of Internal Medicine for Central Officers at the Central Military Hospital 108.
- 2018 – 2021: he became the Deputy Director and in charge of the Department of Internal Medicine at the senior Army Medical Department, which belonged to the Central Military Hospital 108.
With extensive expertise, Dr. Hoan is trusted by many patients, many of them are senior military officers.
