Capacity (As / In The Role Of)
2 related grammar points that express the same core idea - compared below so you can tell which one to reach for.
Members
として / を〜として
Someone or something is being treated as a role by another party.
～を～として vs ～として: Use を〜として when there is an object being cast in the role (彼を代表として送る). Bare として says what the subject already is (医者として働く). The を is what shifts it from a description to an act of designation.