1
to work (for);to be employed (at);to serve (in)
usu. 勤める
私の父は外務省に勤めている。
My father serves in the Foreign Ministry.
2
to serve (as);to act (as);to fill (the position of);to play the role (of)
usu. 務める
彼女は結婚式で花嫁の付き添い役をつとめた。
She was a bridesmaid at the wedding.
3
to conduct a religious service
usu. 勤める
Other forms
務める 【つとめる】