Feb. 1992. – Feb. 1993. Intern at Severance Hospital, Yonsei University
Feb. 1993. – Feb. 1997. Resident at Severance Hospital, Yonsei University
May 2000. – Feb. 2003. Research Instructor of Spine, Neurosurgery, Gangnam Severance Hospital
Mar. 2003. – Feb. 2007. Assistant Professor of Spine, Neurosurgery, Gangnam Severance Hospital
Mar. 2005. – Aug. 2006. Training at Emory Univ. Spine Center, Atlanta, USA
Mar. 2007. – Mar. 2012. Associate Professor of Spine, Neurosurgery, Gangnam Severance Hospital
Sep. 2008. – Aug. 2010. Head of Education Department, College of Medicine, Yonsei University
Sep. 2010. – Aug. 2012. Head of Gangnam Department, College of Medicine, Yonsei University
Sep. 2014. – Aug. 2016. Head of Medical Studies Department, Yonsei University
Sep. 2016. – Aug. 2018. Public Relations Manager, Gangnam Severance Hospital
Mar. 2012. – Currently Professor of Spine, Neurosurgery, Gangnam Severance Hospital
Mar. 2018. – Currently Head Professor of Department of Medical Devices Industry, Graduate School
Sep. 2018. – Currently Vice President of Research Department, Gangnam Severance Hospital
Sep. 2018. – Currently Deputy Head of Gangnam College of Medicine, Yonsei University
Sep. 2018. – Currently Head of Clinical Trials Office, Gangnam Severance Hospital

1986 – 1992 Bachelor, College of Medicine, Yonsei University
1997 – 1999 Masters, College of Medicine, Inha University
2001 – 2004 M.D., College of Medicine, Yonsei University

[Academic Activities Outside of School]
• Member of the Korean Neurosurgical Society
• Member of Korean Spinal Neurosurgical Society
• Member of Korean Cervical Spine Research Society (CSRS)
• Member of World Cervical Spine Research Society
• Member of North American Spine Society (NASS)
• Formal Jury at Korea Research Foundation
• Finance director of Korean Spinal Neurosurgical Society
• Trustee of director of Korean Spinal Osteoporosis Research Society [Research Tasks]
• 2003 Yonsei University New Professor Research Grant Study on neurotization of spinal-cord injury after transplant of the Brain-derived neurotrophic factor(BDNF) and bone marrow cells
• 2005 University Professor Overseas Visit Research Support (Korea Research Foundation) Regeneration of disk pulpy nucleotoxin using bone marrow stem cell transplants and tissue biomechanics
• 2006 Yonsei University College of Medicine-Long-term Overseas Training Research Fund Comparative analysis of SGAG formation and Chondrogenic MRNA Expression for recurring disks and degenerative disks due to disk regeneration
• 2009 Yonsei University College of Medicine-General Professor Research Grant Differences in the regenerative function of the degenerative disks and non-degenerative disks during cytotherapy using cytokine
• 2011 AO Spine Foundation Grant Cytotoxicities of contrast agent for discogram and disc staining agent for endoscopic surgery on human nucleus pulposus cells
• 2012 Korea Research Foundation Research Grant Comparative study on cytotoxicity of four different contrast dye in human nucleus pulposus cell

[Thesis]
• Biologic Response of Degenerative Living Human Nucleus Pulposus Cells to Treatment with Cytokines
YONSEI MEDICAL JOURNAL 56/1 :277-286,2015
• Which iodinated contrast media is the least cytotoxic to human disccells?
SPINE JOURNAL 15/5 :1021