Officiate at sporting events, games, or competitions, to maintain standards of play and to ensure that game rules are observed.

Inspect game sites for compliance with regulations or safety requirements.

Resolve claims of rule infractions or complaints by participants and assess any necessary penalties, according to regulations.

Signal participants or other officials to make them aware of infractions or to otherwise regulate play or competition.

Teach and explain the rules and regulations governing a specific sport.

Inspect sporting equipment or examine participants to ensure compliance with event and safety regulations.

Judge performances in sporting competitions to award points, impose scoring penalties, and determine results.

Verify scoring calculations before competition winners are announced.

Start races and competitions.

Compile scores and other athletic records.