Research focus is to elucidate molecular mechanisms of HPV life cycle and the viral persistence and how the infection progress to cancer. 2001-2008: Research Associate, McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health. 2008-2010: JSPS (Japan Society for the Promotion of Science) fellow, Center for Pathogen Genomics, National Institute of Infectious Diseases, Japan. 2010-2012: JSPS fellow, Division of Carcinogenesis and Prevention, National Cancer Center Research Institute. 2012-2015: FPCR (Foundation for Promotion of Cancer Research) Research Intern, Division of Carcinogenesis and Prevention, National Cancer Center Research Institute. 2015-2020: Staff Scientist, Division of Carcinogenesis and Prevention, National Cancer Center Research Institute. 2020-2021: Staff Scientist, Department of Immune Medicine, National Cancer Center Research Institute. 2022-current: Visiting Scientist, Department of Immune Medicine, National Cancer Center Research Institute.