
Assistant Professor, Sejong University, Seoul, Korea
August 2013 – Present
Research topics: Internet of Things (IoT), Machine to machine communications (M2M), Semantic M2M, Smart IoT Services, Software Security, Privacy and Reliability.
Standardization activities: oneM2M, TTA IoT Convergence Special Project Group
Activities:
- IEEE WF-IoT Publicity Chair
- TTA PG 308 (WPAN) Vice Chair
- TPC member of several conferences (e.g., ICC, ICCVE, WF-IoT)
- Journal reviewer (e.g., Computer Networks, IEEE Sensors Journal, IEEE Wireless Communications Magazine)
August 2013 – Present
Research topics: Internet of Things (IoT), Machine to machine communications (M2M), Semantic M2M, Smart IoT Services, Software Security, Privacy and Reliability.
Standardization activities: oneM2M, TTA IoT Convergence Special Project Group
Activities:
- IEEE WF-IoT Publicity Chair
- TTA PG 308 (WPAN) Vice Chair
- TPC member of several conferences (e.g., ICC, ICCVE, WF-IoT)
- Journal reviewer (e.g., Computer Networks, IEEE Sensors Journal, IEEE Wireless Communications Magazine)

Senior Researcher, NEC Europe Ltd, Heidelberg, Germany
August 2012 – December 2013
Research topics: Machine to machine communication, Semantic M2M, Abstraction layer, M2M service and resource management, Smart building and Smart city
Standardization activities: participating ETSI TC M2M and oneM2M
Research projects: Campus 21 and Building-as-a-Service (BaaS) EU FP 7 projects
August 2012 – December 2013
Research topics: Machine to machine communication, Semantic M2M, Abstraction layer, M2M service and resource management, Smart building and Smart city
Standardization activities: participating ETSI TC M2M and oneM2M
Research projects: Campus 21 and Building-as-a-Service (BaaS) EU FP 7 projects

Leading Consultant, Samsung SAIT, London, UK
June 2010 – December 2011
Consulting areas: ICT related technologies such as Communication Networks, Multimedia and Computing, Smart Grid, etc.
June 2010 – December 2011
Consulting areas: ICT related technologies such as Communication Networks, Multimedia and Computing, Smart Grid, etc.

Senior Researcher, LG Electronics Inc. Anyang, Korea
2004 – 2008 (4 years)
3GPP TSG SA delegate
3GPP TSA SA WG2 delegate
TR 23.893 Multimedia Session Continuity rapporteur
TS 23.237 IMS Service Continuity rapporteur
Main standard areas: System Architecture Evolution, IP Multimedia Subsystem
2004 – 2008 (4 years)
3GPP TSG SA delegate
3GPP TSA SA WG2 delegate
TR 23.893 Multimedia Session Continuity rapporteur
TS 23.237 IMS Service Continuity rapporteur
Main standard areas: System Architecture Evolution, IP Multimedia Subsystem

Mobile Software Engineer, LG Electronics, Seoul, Korea
2002 – 2004 (2 years)
Developed Mobile Handset Software
Developed IrDA Firmware Software
Designed and Implemented Mobile Banking System
Provided internal lectureres on Software Engineering
2002 – 2004 (2 years)
Developed Mobile Handset Software
Developed IrDA Firmware Software
Designed and Implemented Mobile Banking System
Provided internal lectureres on Software Engineering

Internship, Siemens Corporate Technology, Information and Communications Mobile, Munich, Germany
June 2001 – December 2001 (6 months)
Implemented migration tools for Intelligent Network using C, Java and CORBA
June 2001 – December 2001 (6 months)
Implemented migration tools for Intelligent Network using C, Java and CORBA