University of Delaware, Newark, DE, June 2005 - present
Research Assistant – Mechanical Systems Laboratory
• Conducted research on planning and control of various autonomous mobile robots including two-wheeled, car-like, tractor-trailer robots, and under-actuated mobile manipulators.  This involved dynamic modelings, computer simulations in MATLAB/SIULINK and various experiments using IRobot’s Magellan Pro mobile robots with a camera vision system. 
• Developed planning and control algorithms for NIST (National Institute of Standards and Technology)’s mobility-assist and lift robotic system named HLPR Chair.
• Conducted research on assistive technologies with mobile robots including an assistive manipulator, a mobility assistive robot, and “baby robot.”
• In the “baby robot” project, we provide very young infants (as young as 5-6 months) or special needs babies with mobility generated by a mobile robot to help them improve cognitive development as well as physical development.  The “baby robot” project has been featured in several newspapers and media video reports including Discovery Channel, ABC, Comcast, The Washington Post, and The Associated Press.
 
Samsung Electronics, Suwon, South Korea, June 2002 - May 2004
Research Engineer - Institute of Intelligent System, Mechatronics Center
• Developed machine-operating programs with GUI (Graphical User Interface) using Microsoft Visual C++ on Windows OS.
• Developed motion control interface libraries and programs in C/C++ for X-Y cartesian robot using PMAC & MEI motion controllers.
• Used a software architecture design method using UML.

MeccaTechs (now called UBprecision), Yongin, South Korea,  April 2000 - May 2002
Research Engineer - Research Center
• Developed a machine-operating program based on VRTX (Real Time OS) in VME environment.
• Developed motion control interface libraries and programs in C/C++ for X-Y cartesian robot using PMAC motion controller.

Daewoo Heavy Industries (now called Doosan Infracore), Changwon, South Korea,  March 1999 - March 2000
Assistant Research Engineer - Factory Automation System Engineering Center
• Designed a special purpose machine using AutoCAD for truck engine manufacturing.

Korea Advanced Institute of Science and Technology (KAIST),  March 1997 - February 1999
Research Assistant – Microsystems Laboratory (now called NanoSentuating Systems Laboratory)
• Designed, fabricated, and tested an electromagnetic microactuator using MEMS technology in Biochip Technology Research.