officiate (as something) at (something)

officiate (as something) at (something)

To act or serve in an official presiding role of authority (such as a judge, referee, officiant, etc.) at some event. I was honored that my friend wanted me to officiate at his wedding. They asked Tom to officiate as the judge at the county fair bake-off.
See also: officiate
Farlex Dictionary of Idioms.

officiate (as something) (at something)

to serve as an official or moderator at some event. They asked me to officiate as a judge at the contest. Laura will officiate as parade marshal.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • officiate
  • penny wedding
  • hot ticket
  • Catholic gap
  • wedding tackle
  • dance at (someone's) wedding
  • dance at wedding
  • white wedding
  • shotgun wedding
  • a shotgun wedding