SIM GE don't see results. Anyone can enter. They literally take in everybody. Unisim should be something you could aim for. Unisim is now recognised by the government and is now local. But because it is local, it is harder to get in, but not as difficult as NTU/NUS/SMU. Private degrees definitely very difficult to get into government sector, so try to stay away from them if you can. If you get a local degree, you will have more options for work.