CAAS
Also as far as i recall CAAS will talk to CASA, they will need to see all your original docs/ licences.
I dont know about ATPL exams etc . .
I would have thought your employer would have assisted with all this?
Engineers have to sit and pass Air Law and Human Factors exams before they can certify/ work at Changi.
Again i dont know what if any exams pilots have to do?
I am sure your employer will lease with CAAS, mine did.
Good Luck with it all !