Baseball
- BabeRuth Baseball, Inc
- Major League Baseball
- Minor League Baseball
- Minor League Baseball Umpire Training Academy
- Charlie Rose Baseball
- Little League Baseball
- USSSA Baseball (United States Specialty Sports Association)
Boxing
Basketball
- Fédération Internationale de Basketball Association (FIBA)
- German speaking basketball officials
- National Basketball Association (NBA)
- Women’s National Basketball Association (WNBA)
- USA Basketball
- International Association Approved Basketball Officials (IAABO)
Cycling
Fencing
Field Hockey
Football (American)
Golf
- Professional Golfers Association (PGA)
- United States Golf Association (USGA)
- Ladies Professional Golf Association (LPGA)
- PGA Tour (PGA)
Ice Hockey
Ice Skating (Figure Skating, Speed Skating, etc.)
Judo
Lacrosse
- Nassau County Lacrosse Officials Association
- New Hampshire Lacrosse Officials Association
- US Lacrosse
Modern Pentathlon & Biathlon
Netball
Powerlifting (Weight Lifting)
Rowing (Crew)
Rugby
Sailing
Skiing (Snow)
Soccer (Football)
- Fédération Internationale de Football (FIFA)
- International Football Association Board (IFAB)
- Major League Soccer
- Metropolitan Washington Soccer Referees Association
- National Intercollegiate Soccer Officials Association
- Iowa Referee Committee
- United States Soccer Federation
Softball
- National Softball Association
- National Softball Association of the Deaf
- BC Softball
- The Amateur Softball Association
Squash
Swimming, Diving, & Water Polo
Table Tennis
Taekwondo
Team Handball
Tennis (Lawn)
Track & Field
Triathlon
Volleyball
- Fédération Internationale de Volley-Ball (FIVB)
- Volleyball Canada
- Professional Association of Volleyball Officials (PAVO)
- USA Volleyball
- USA – Volleyball World Wide