The position was vacant for so long--now they filled with BG
Tung Yui Fai former ACGS (ops). The ACGS ops position now goes to
BG Chan Wing Kai.
http://www.mindef.gov.sg/imindef/publications/cyberpioneer/news/2011/mar/21mar11_news.html
http://www.mindef.gov.sg/imindef/mindef_websites/atozlistings/army/About_Us/Org_Structure.html
That was a long vacancy