· Professor, Dept. of Periodontology, Kyungpook National University Dental Hospital
- Vice President of the Korean Academy of Periodontology
- Vice Dean of the Kyungpook National University School of Dentistry
- President of Daegu-Kyungpook Br. of Korean Academy of Periodontology
· Professor, Dept. of Prosthodontics, Kyungpook National University School of Dentistry
· Assistant Professor, Dept. of Prosthodontics, Jeonbuk National University Dental Hospital
- Chief, Jeonbuk National University Dental hospital Dental Laboratory and CAD-CAM center
· Professor, Dept. of Prosthodontics, Yonsei University School of Dentistry
- Editorial director of Korean Academy of Prosthodontics
- Editor-in-Chief of Journal of implantology and applied sciences
- The First Outstanding Paper Researcher Award, Korean Academy of Oral and Maxillofacial Implantology
· Professor, Dept. of Periodontology, VHS Medical Center
· Research Professor, Kyungpook National University Institute for Translational Research in Dentistry
· Professor, Dept. of Prosthodontics, Kyungpook National University School of Dentistry
- Best Research Award, KNU Dental School
- Yeonsong Dental Award, Best research, Korean Academy of Dental Science
· Associate Professor, Columbia University College of Dental Medicine
· Professor, Yonsei University School of Dentistry
- Hatton Award, 3rd place award for International Association of Dental Research
· Director, Mac Dental Clinic
- Adjunct Professer of Kyungpook National University School of Dentistry
· Director, Mac Dental Clinic
- Adjunct Professer of Kyungpook National University School of Dentistry