1. Vice Chairman of Artificial Intelligence Group, Long Island section of IEEE, 1988 - 1994.

2. Secretary of Computer Society, Long Island Section of IEEE, 1991 – 1993.

3. Officer of Chinese American Academic and Professional Society, Jan. 1988 to Dec. 1988.

4. Vice President of Publication, Chinese American Scholars Association, May 1989 to May 1993.

5. Member of Board of Kaohsiung Association for Information Development, August 1998-1999.

6. Member of Board of OOTSIG, Chinese Computer Association, January 2000-2001.

7. Member of Board of Chinese Fuzzy System Association, January 2000-2003.

8. Member of Board of Chinese American Academic and Professional Society, USA, 2006 – 2009.

9. Member of Board of Chinese American Academic and Professional Society, USA, 2009 – 2012.

10. Member of Executive Council of Chinese American Academic and Professional Society, USA, 2012 – 2013.

11. President, Taiwanese Association for Social Networks, Taiwan, 2014.02.24 – 2016.02.23.

12. Editor-in-Chief, International Journal of Information Privacy, Security and Integrity, Inderscience Publisher, 2015.