We organized these conferences/workshops:
- GraphMasters Workshop, ITB Bandung, December 18-19, 2010.
- CIMPA School on Extremal Problems and Hamiltonicity in Graphs, February 2-13 2009.
- International Conference on Graph Theory and Information Security (ICGTIS), ITB Bandung, Jawa Barat, 10-13 February 2007.
- International Workshop on Graph Labelling (IWOGL), Batu, Jawa Timur, 6-9 Desember 2004.
- Indonesia-Japan Joint Conference on Combinatorial Geometry and Graph Theory (IJCCGGT), ITB Bandung, September 13-16, 2003.
- The 12-th Australasian Workshop on Combinatorial Algorithms (AWOCA), Bandung, Indonesia, 14-17 July 2001.
Conference Program Committee
- Member, LUMS 2nd International Conference on Mathematics and Its Applications in Information Technology, Lahore Pakistan, 9 – 12 March 2008.
- Member, The 13th National Conference on Mathematics, UNNES Semarang, 24-27 July 2006.
- Member, Indonesia Cryptology & Information Security Conference, Jakarta, 30-31 Maret 2005.
- Member, International Workshop on Graph Labelling (IWOGL), Herlany Slovakia, 3-7 July 2005.
- Member, The 12th National Conference on Mathematics, Bali, 21-24 July 2004.
- Member, 15th Australasian Workshop on Combinatorial Algorithms, NSW Australia, 7-9 July 2004.
- Member, 14th Australasian Workshop on Combinatorial Algorithms, Seoul Korea, 13-16 July 2003.