1998- February 2007: Lecturer of General Internal Medicine - Hanoi Medical University & Doctor of General Internal Medicine Department of Central Geriatric Hospital
February 2007 - July 2013 Central Geriatric Hospital - Head of General Internal Medicine Department
August 2013 - October 15, 2023 - Hanoi Medical University - Lecturer of Internal Medicine - Department of Geriatrics & Head of General Internal Medicine Department of Geriatric Hospital
February 2018 - February 2023: Head of medical examination department on request - Geriatric Hospital
March 2023 - October 2023: Director of on-demand medical examination center - Geriatric Hospital
October 20, 2023: Vinmec Times City Hospital - Deputy Department of General Internal Medicine