I have no clue about the present situation, but when I was a university student, it appears that there were many Malaysians who were on Singapore government scholarships, and I assume that after they graduate, they will be working with or in the SG civil service.
Upon completing my final exams, I worked a few months, did my annual reservist training, then attended SATO, and left SG, and accordingly, I am unable to ascertain whether or not those Malaysians, did join the SG civil service, upon their graduation.