Professor, Dept. of Electrical and Information Engineering, Seoul National University (1993-) Assistant Professor, Dept. of Mechanical and Aerospace Engineering, Princeton University (1987-1993) Director, Biomimetic Robot Research Center, Seoul National University (2013-) Senior Member, National Academy of Engineering of Korea (2012-) President-Elect, International Federation of Automatic Control (2021-) Co-Editor-in-Chief Robotics, Mechatronics (2021-) Senior Editor, IEEE Journal of Microelectromechanical Systems (2012-) Editorial Board Member, MDPI Sensors (2020-), MDPI Actuators (2018-)