officiates

/AH0 F IH1 SH IY0 EY0 T S/
verb
  1. 1

    To perform the functions of some office.

    โ€œShe officiated as registrar at the wedding.โ€

  2. 2

    To serve as umpire or referee.

    โ€œHe's never officiated a cup-final before.โ€

Source: https://en.wiktionary.org/wiki/officiate, https://en.wiktionary.org/wiki/officiates