Maritime security seems big around this region, lots of piracy in the Straits of Malacca. In tems of local work, not sure how many opportunities there are for a foreigner in law enforcement. Are there MNC security firms doing local work?
Serious security work is done by the police and military here. Commercial security work is really low paid, so I doubt they would have imported management.
It's a niche field, would definitely take some networking but maybe there is something out there.