The civil service, at least until now, places a lot of emphasis on tertiary education by local university (i.e., NUS, NTU, SMU and SUTD). SIT, SUSS may command slightly lesser while SIM is usually the lowest among since it is more like a ‘private uni’. Your role as a Wospec may also not be regarded as relevant experience so you should be prepared for a 25-35% pay cut as you do not get all the combat-readiness pay. Even for DXOs themselves from public uni, they are usually paid lesser than combat counterparts for the same reason described above.

Right now, i suggest you work your best and if possible get into the top 4, then if otherwise go at least SIT or SUSS if you’re aiming towards the civil service. A quick search would tell you private uni students will face higher obstacle entering civil service - so do your best!