Certified referees can sign up for games at this link:

Referee Sign Up Page

On this page each week is a different tab, and on each tab lists all of the games we have for that day. To sign up to referee a game, just add your name in the box for the game. Indicate whether you want to be a Center Referee (C:) or an Assistant Referee (AR:) for U10 and above. For youth referees we recommend that you sign up for U8 games or as Assistant Referees to start out.