adjudicator

US /əˈdʒuː.də.keɪ.t̬ɚ/
UK /əˈdʒuː.də.keɪ.t̬ɚ/
"adjudicator" picture
1.

a person who makes an official decision about who is right in a dispute

:
The independent adjudicator ruled in favor of the claimant.
She was appointed as the adjudicator for the poetry competition.