1985 - 1991: Lecturer of General Internal Medicine subject – Hanoi University of Medicine
05/1991 - 05/1992: Resident Physician at Hospital Center University of Caen, France
1992 - 1995: First Degree Specialist and Lecturer of General Internal Medicine subject - Hanoi University of Medicine
1995 - 1999: MSc. Second Degree Specialist. MD and Lecturer - Hanoi University of Medicine
05/1999 - 10/1999: Resident Physician at La Conception Hospital. Participated in intensive training course in Rheumatology (La formation spécialisée approfondie de Rhumatologie) at Marseille University, France
07/09/2002 - 12/2003: MSc. Second Degree Specialist. MD and Lecturer of General Internal Medicine subject at Hanoi University of Medicine, and Deputy Head of Rheumatology Department at Bach Mai Hospital
12/2003 - 11/2004: PhD. Second Degree Specialist. Lecturer of General Internal Medicine subject at Hanoi University of Medicine, and Deputy Head of Rheumatology Department at Bach Mai Hospital
11/2004 - 12/2007: PhD. Second Degree Specialist. Lecturer and Deputy Head of Internal Medicine Department at Hanoi University of Medicine, Deputy Head of Rheumatology Department at Bach Mai Hospital
12/2007 - 14/042009: Assoc. Prof. Second Degree Specialist. Lecturer and Deputy Head of Internal Medicine Department at Hanoi University of Medicine, Deputy Head of Rheumatology Department at Bach Mai Hospital
14/04/2009 - 25/05/2012: Assoc. Prof. Second Degree Specialist. Lecturer and Deputy Head of Internal Medicine Department at Hanoi University of Medicine, Head of Rheumatology Department at Bach Mai Hospital
25/05/2012 - 03/2013: Assoc. Prof. Second Degree Specialist. Senior Lecturer and Deputy Head of Internal Medicine Department at Hanoi University of Medicine, Head of Rheumatology Department at Bach Mai Hospital
03/2013 - 07/2013: Assoc. Prof. Second Degree Specialist. Senior Lecturer of Internal Medicine Department at Hanoi University of Medicine, Head of Rheumatology Department at Bach Mai Hospital
07/2013 - Now: Assoc. Prof. Second Degree Specialist. Senior Lecturer of Internal Medicine Department at Hanoi University of Medicine