| Authorized Director of Derivatives Business Operator TISCO SECURITIES CO.,LTD. | 27/12/2005 | |
| Authorized Director of Securities and Derivatives Business Operator TISCO INVESTMENT ADVISORY SECURITIES CO.,LTD. | 14/09/2011 | |
| Authorized Director of Securities Business Operator TISCO SECURITIES CO.,LTD. | 21/12/2001 | |
| Fundamental Investment Analyst on Capital Market | 01/01/2024 | 31/12/2025 |
| Manager of Securities and Derivatives Business Operator TISCO SECURITIES CO.,LTD. | 30/11/2006 | |