| Authorized Director of Securities and Derivatives Business Operator DEFINIT INVESTMENT ADVISORY SECURITIES CO.,LTD. | 06/10/2023 | |
| Authorized Director of Securities Business Operator FINNOMENA MUTUAL FUND BROKERAGE SECURITIES CO.,LTD. | 08/01/2020 | |
| Derivatives Investment Manager | 01/01/2023 | 31/12/2024 |
| Fundamental Investment Analyst on Capital Market | 01/01/2024 | 31/12/2025 |