I was wondering if teaching business English for salarymen/business women would be okay as a white person, considering I have a degree in English education as well as tesol certification? I figure that these are adults who are choosing to learn English for their career, and that would therefore be okay and less imperialistic (but correct me if I'm wrong). Do you see this as an issue?

You seem to be operating under the assumption that there aren’t equally qualified local teachers, and ignoring the privilege you have of being a white English speaker in being hired over other teachers.

Funny how you folks never think about the people you likely are displacing from jobs and don’t consider that as being another aspect of the problem of how English is taught and who teaches it abroad. Also that just because you have TESOL/English education background doesn’t mean that what you learned and how you teach are not rooted in racism. It is way more complicated than you folks like assuming.