2006-        

Faculty in Foundation Department at Academy of Art University, San Francisco, California.

2006-        

Contract Instructor at Sharon Art Studio, San Francisco, California.

1998-     

Private workship in painting and drawing

2000-2002    

Cubix concept artist at Cinepix co., Seoul, Korea.

1998-2000    

Café 9 concept and 3D designer at OZ Inter-media co., Seoul, Korea.

1998-1999    

Digital illustration instructor at Antz digital art institute, Seoul, Korea.