- The postgraduate diploma from University of London
- The certificate of IELTS preparation course at Regent School in the UK
- Complete English essay writing from Oxford Royal Academy
- The University of British Columbia Certificate in Translation and Interpretation for Business 과정
- The president of London IELTS Academy
- ieltseasywriting.com(첨삭 사이트)
- 저서 『에세이 어휘집』, 『IELTS Easy Writing』