2006 - 2008
Korean CSAT English test-prep instructorETOOS - SEOUL, 대한민국
2008 - 2010
Korean CSAT English test-prep instructorVisang edu - Seoul
2010 - 2015
Korean CSAT English test-prep instructorWstudy - Seoul
2015 - 2024
Korean CSAT English test-prep instructorbom's English - GwangJu, 대한민국
2025 - 현재
Korean teacherKvillage - 일본