- Member Lawyer at Sewon Law & Accounting Firm (2002-2003)
- Managing Partner Lawyer at Lee & Chang Law Firm (2003-2006)
- Member Lawyer at Yoon & Bae International Law Firm (2006-2010)
- Member Lawyer at L&K Law Firm (2010-2012)
- Managing Partner Lawyer at L&K Law Firm (2012-2013)
- Member Lawyer at Law Firm Hanyang (2013-2022)
- Legal Advisor at Korea Land & Housing Corporation (2006-2007)
- Legal Advisor at Seoul Metropolitan Rapid Transit Corporation (2006-2009)
- Public Interest Member of Adjudication Division at Central Labor Commission (2010-2014)
- Legal Advisor at Korea Deposit Insurance Corporation (2013-2017)
- Legal Advisor at Gyeonggi Dental Association (current)
- Legal Advisor at Gyeonggi Taekwondo Association (current)
- Mediator at Autonomous Dispute Resolution Committee of Korea Consumer Agency (current)
- Co-Representative of Suwon Green Consumer Federation (current)
- Member Lawyer at Min Law Firm (current)