Unlike in developed countries (and that includes Singapore), PhD in graduates in Malaysia mostly work in the academia, doing teaching and research. Unless your area of expertise is of high commercial value, there isn't much scope for PhD holders in the commerical/private sector.  The focus on research has not reach a stage where PhD graduates are in good demand yet.  That's a reality you'd have to face - like it or not, chances are, you'll end up doing teaching and research in the acadamic field.