N4 - 公務員こうむいん
government worker
N4 - 店員てんいん
shop assistant
N3 - 委員いいん
committee member
N3 - 会員かいいん
member, the membership
N3 - 議員ぎいん
member of the Diet, congress or parliament
N3 - 全員ぜんいん
all members (unanimity), all hands, the whole crew
N2 - 工員こういん
factory worker
N2 - 定員ていいん
fixed number of regular personnel, capacity (of boat, etc.)
N2 - 満員まんいん
full house, no vacancy, sold out
N1 - 教員きょういん
teaching staff
N1 - 職員しょくいん
staff member, personnel
N1 - 従業員じゅうぎょういん
employee, worker