referee
rɛfəˈriː/
noun
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1.an official who watches a game or match closely to ensure that the rules are adhered to and (in some sports) to arbitrate on matters arising from the play.
"the referee sent off two French players"
synonyms: umpire, judge, referee's assistant, assistant referee, linesman, line judge, adjudicator, arbitrator, arbiter, mediator; informalref"the referee blew his whistle for a penalty"
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2.
BRITISH
a person willing to testify in writing about the character or ability of someone, especially an applicant for a job.
"the subject of a bad reference can sue the referee for libel"
synonyms: supporter, character witness, backer, advocate "applications should include a curriculum vitae and the names of two referees"
UK /ˌref.əˈriː/ US /ˌref.əˈriː/[ C ] (JUDGE)
Take your pick, I'm sure one of these fits.