Since you already have family here, fly over and start the job search in person.
You won't get USD$70K. You are very unlikely to get S$70K unless you have experience in a niche area in demand. But...
(1) Try the multinational companies first. I suggest the banks and big IT brands (eg. IBM, HP)
(2) Don't leave out the big consulting firms.
(3) Think how you want to market yourself. As a technical software/hardware person (and pit yourself against the thousands already here) ? You speak Mandarin well - that might take you into a bit of project management involving other Asian countries. How about your American accent (they love it here!) - try a sales position in corporate IT services such as telcos and ISPs.
