Teacher | Sensei | せんせい
Student | Gakusei | がくせい
Company employee | Kaishain | かいしゃいん
Bank employee | Ginkouin | ぎんこういん
Doctor | Isha | いしゃ
Researcher | Kenkyusha | けんきゅうしゃ
Engineer | Enjinia | えんじにあ
Housewife | Shufu |しゅうふ
A person of a particular company:
E.g Apple employee = Appuru no shain
Structure: Company name *no shain
Tomoko is a bank employee | Tomoko-san wa ginkoin desu | ともか さん は ぎんこいん です
Ichiro is an Apple employee | Ichiro-san wa Appuru no shain desu | いちろう さん は あっぷる の しゃいん です