Officiate at competitive athletic or sporting events. Detect infractions of rules and decide penalties according to established regulations.

Other names for Umpires, Referees, and Other Sports Officials: Athletic Events Scorer, Baseball Umpire, Basketball Referee, Clerk of Scales, Clocker, Commissioner of Officials, Director of Officials, Director of Officiating, Diving Judge, Diving Meet Director, Diving Referee, Dog Track Kennel Manager, Dressage Judge, Equestrian Competitive Horse Show Judge, Equestrian Events Judge, Football Referee, Ground Jury President, Handicapper, Harness Racing Handicapper, Hockey Referee, Hoof and Shoe Inspector, Horse Identifier, Horse Race Starter, Horse Race Timer, Horse Show Judge, Judge, Jumper Judge, Major League Baseball Umpire, Marshal, National Basketball Association Referee (NBA Referee), National Hockey League Referee, NCAA Judge (National College Athletic Association Judge), National Coordinator of NCAA Baseball Umpires (National Coordinator of National College Athletic Association Baseball Umpires), NCAA Basketball Official (National College Athletic Association Basketball Official), Paddock Judge, Patrol Judge, Pit Steward, Placing Judge, Presiding Steward, Race Starter, Racetrack Steward, Racing Secretary, Racing Secretary and Handicapper, Receiving Barn Custodian, Referee, Scoreboard Operator, Scorer, Soccer Referee, Softball Umpire, Sports Activities Foul Judge, Sports Official, Sports Statistician, Starter, Steward/Stewardess, Supervisor of Officials, Umpire, United States Equestrian Federation Hunter and Hunter Seat Equitation Judge (USEF Hunter and Hunter Seat Equitation Judge), United States Equestrian Federation Representative (USEF Federation Representative), United States Equestrian Federation Steward (USEF Steward), Wire Steward,

• Confer with other sporting officials, coaches, players, and facility managers in order to provide information, coordinate activities, and discuss problems.
• Report to regulating organizations regarding sporting activities, complaints made, and actions taken or needed such as fines or other disciplinary actions.
• Compile scores and other athletic records.
• Direct participants to assigned areas such as starting blocks or penalty areas.
• Research and study players and teams in order to anticipate issues that might arise in future engagements.
• Officiate at sporting events, games, or competitions, to maintain standards of play and to ensure that game rules are observed.
• Judge performances in sporting competitions in order to award points, impose scoring penalties, and determine results.
• Inspect sporting equipment and/or examine participants in order to ensure compliance with event and safety regulations.
• Keep track of event times, including race times and elapsed time during game segments, starting or stopping play when necessary.
• Signal participants or other officials to make them aware of infractions or to otherwise regulate play or competition.
• Verify scoring calculations before competition winners are announced.
• Resolve claims of rule infractions or complaints by participants and assess any necessary penalties, according to regulations.
• Start races and competitions.
• Teach and explain the rules and regulations governing a specific sport.
• Verify credentials of participants in sporting events, and make other qualifying determinations such as starting order or handicap number.