- Intern at Chonnam National University Hospital
- Resident at Chonnam National University Hospital
- Training at Changgung memorial hospital (Taiwan)
- Full-time doctor at Chonnam National University Hospital
- Clinical assistant professor at Chonnam National University Hospital
- Clinical Professor, Catholic Kwandong University International St. Mary’s Hospital
- Steering Committee Member, Vascular Research Group, Korean Society of Thoracic Surgery
- Director, Korean Society of Interventional Vascular Surgery
- Regular member of the Korean Lung Cancer Society
- Regular member of the Korean Society of Thoracic Surgery
