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 Associate Professor, School of Computer 
	Engineering, Nanyang Technological University, Singapore. (since Sept 2013)
	 
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Director, Cyber Security Lab, 
	Nanyang Technological University, Singapore. (March 2013- Dec 2015) 
	
	 
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Director, Forensics and Security 
	Lab, Nanyang Technological University, Singapore. (Aug 2011-March 2013) 
	
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	Visiting professor, King Saud University, Kingdom of 
	Saudi Arabia, 2010.
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	Expert witness, U.S. Department of Justice (United States v. 
	Michael Joseph Pepe, CDCA Case No. CR 07-168(A)-DSF), 2008.
	
	
	
	-  Assistant Professor, School of Computer 
	Engineering, Nanyang Technological University, Singapore. (July 2007-Aug 
	2013)
 
	-  Consultant, Knowledge Funds Ltd, Waterloo, 
	Canada. (Feb 2007- April 2007)
 
	- Research Associate, Biometrics Research Center, 
	Department of Computing, The Hong Kong Polytechnic University, Hong Kong. 
	(Oct 2002 – Dec 2003)
 
	- Research Assistant, Biometrics Research Center, 
	Department of Computing, The Hong Kong Polytechnic University, Hong Kong. 
	(April 2001 – Oct 2002)
 
	- Visiting Lecturer, Department of Computing, The 
	Hong Kong Polytechnic University, Hong Kong. (Oct 2000 – Jan 
	2001)(Part-time)
 
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Project Assistant, Department of 
	Mathematics, Hong Kong Baptist University, Hong Kong. (July 1998)
 
	 
	
	- Teacher, Caritas Institute for Further and Adult 
	Education (Tuen Mun Night School), Hong Kong. (July 1997- Aug 1997)