He can consider an appeal to the High Court. I assume he’s a first time offender. This category usually dealt with more leniently. His current sentence appears manifestly excessive imo.
If public monies involved, yes, give him jialat jialat. But wtf, it was his company’s and they failed to detect the huge loss!
Quite a silly old man. Should have found a place to retire. Or, was he waiting to get caught?