Visa issues are one of the main topics of this forum. Many people outside HK appear confused about them. Nationality is rarely an issue for a work visa if the job is well paid and contains skills not found in Hong Kong. On the other hand, for borderline jobs or those that can easily find skills in HK, there is possibly some "issues" that may come into play. The way you post makes me wonder where you come from! (In other words, not a native English speaker which means that being a teacher - the old standby for just about everyone accompanying someone here, may not be an option).