• Endorsor for Istanbul Agop cymbals(2006~ ) • CTS and CBS Broadcasting main drummber(2003~ ) • Professor of Baekseok Arts University(2004~) • Jazz band KOREAN6 leader and drummer(2006 ~) • Drum lesson through the biggest music internet site(www.mule.co.kr) in Korea(2006~) • A member of the most famous Jazz trio "ShinKwanwoong" • Choi Chiwoo's Dynamic drum Drum lesson DVD(2007) • Live and recording session for famous artists(more than 1000) • Performs in more than 50 drum clinics a year • Yamaha electric drum(DTX) clinician(2005 - 2007. 7)