Yes it is possible to be a chinese teacher thru pgde with an engineering degree as long u studied higher chinese before in secondary sch or jc. But u can only teach in primary sch level. Teaching in sec and jc level requires u to have a chinese degree.

I myself have a science degree but is also a primary sch chinese teacher now since there is no lack of science teachers in sec and jc lvl. Most of my peers frm the same major also join MOE teaching in primary sch, unless they alrdy hv scholarship or teaching award.

MOE would always choose a local over ppl from PRC or malaysia if the singaporean is qualified enough to teach chinese. However, nowadays more and more singaporean cnt even converse well in mandarin and lack in interest in the subject. Hence , no choice have to look for foreigner to teach chinese.