– Lattice Semiconductor Ltd., USA: R&D Engineer (1993-1994)
– Synopsys Inc., USA: R&D Engineer (1995-1997)
– KAIST: Assistant Professor (1998-2001), Associate Professor (2002-2003)
– School of Electrical and Computer Engineering, Seoul National University: Associate Professor (2004-2005), Professor (2006-present)
– Program Director of Intelligent Semiconductor System, School of Transdisciplinary Innovations, Seoul National University (2024-present)