• Texas A&M University, Doctor of Civil Engineering
• Seoul National University, Master of Urban Planning
• Hanyang University, Engineering Major

• Current: Professor of Transportation Engineering at University of Seoul (Department Head/Minister of Education)
• Deputy Professor of Transportation Engineering at University of Seoul
• Assistant/Deputy Professor of Construction Environmental Engineering at Gongju University
• Assistant Professor of Civil Engineering at Asian Institute of Technology
• Responsible Researcher at the SOC Research Center of the Korea Land Research Institute
• Post-doctor Texas Transportation Institute
• A commissioned researcher at Seoul Government Development Institute
• Researcher at Seoul National University's Environmental Planning Institute
• A commissioned researcher at Korea Institute of Transportation Development (KTR)