- Vaccine/adjuvant development and immune memory
- Functional relationship between microbiota and host immunity
- Metabolic regulation and protective immunity

1997 ~ 1999 Post doctoral fellowship, USDA, MD, USA
1999 ~ 2001 Post doctoral fellowship, NIH, MD, USA
2002 ~ 2004 Visiting Research Scientist, Gothenburg University, Sweden
2004 ~ 2006 Cellular Immunology Section Chief, International Vaccine Institute, Korea
2012 ~ 2014 The president, Korean Society for Dendritic Cell
2017 ~ current Chair of Committee on Publication Ethics, Korean Council of Science Editors
2020 ~ current Co Editor-in-Chief of the Animal Bioscience
2020 ~ 2022 Secretary General of Council of Asian Science Editors
2021 ~ current 5th National Research Ethics Consulting Committee, the Ministry of Education, Korea
2022 ~ current Director of the SNUIACUC (Seoul National University Institutional Animal Care and Use Committee)

2010. 04. 14 Distinguished Teaching Award for the professor, Kukdam Foundation, Seoul National University
2018. 12. 05 Seoul National University Excellence in Teaching Award, Seoul National University
2022. 04. 21 Received official commendation in the area of science and technology from the cabinet minister of the Ministry of Science and ICT, Korea