- 8 years as a Telecom Service Engineer, with 2 years in Siemens APAC Regional Network Care Center based in Bangkok. Participaing in managing project nationwide and abroad. Left Siemens while holding the role of key technical expert for carrier class switching systems.

- 3 years at the position of COO in NTS (Nam Truong Son ICT Corp) - one of the leading ICT businesses in Vietnam - seting up the management system for the company and directly take charge of Customer Services function.

- Founding INNMA, a consulting & training business since 2006;

- Co-founding EXA, a cloud computing business providing cloud infrastructures;

- Experiencing entrepreneurship since 1998, with nearly 10 times starting upbusinesses;

- Playing key roles in different business consultanting project for larger enterprises, and being trainer/coach in business and management training programs;

- Translator of published skills and business books: (1) "Fearless Interviewing" of Marky Stein; (2) "Leading Change" and (3) "The Heart of Change" of John P. Kotter; (4) "The Prince" of Machiavelli, and (5) "The Executive" of John P. Harmon;

- Author of the published book of "Cheerfull Management"