Terry Vaughn (born 1 April 1973) is an American soccer referee who currently resides in Mount Vernon, Iowa. He has been a full international referee for FIFA since 2004.

Marco Antonio Rodríguez Moreno (born November 10, 1973 in Mexico City) is a former Mexican football referee.

Mark William Geiger (born August 25, 1974) is an American sports administrator and former soccer referee. He is the senior director of match officials at the Professional Referee Organization (PRO), which oversees domestic referees in Major League Soccer (MLS). Geiger previously officiated in MLS and was on the FIFA International Referees List from 2008 to 2019. At the international level, Geiger refereed the 2012 Olympics; at the 2013 and 2015 CONCACAF Gold Cups; and at the 2014 and 2018 FIFA World Cups. At the 2014 World Cup, he became the first referee from the United States to officiate a knockout match at a World Cup tournament. Before becoming a full-time referee, Geiger was a high school mathematics teacher.

David Gantar (born June 27, 1975) is a Canadian soccer referee for PRO from Edmonton, Alberta. He has been a Canadian National Referee since 2004, and became a FIFA Referee in 2011. Gantar had a highly successful first year of international duty, officiating at three international tournaments — including one major tournament — and in the CONCACAF Champions League and 2014 FIFA World Cup Qualification.

Michael Kennedy (born 1961-04-16) is a soccer referee from the United States. He was a FIFA referee from 1999 to 2006, supervising several international (friendly) matches during his career.

Jair Marrufo (born June 7, 1977) is an American soccer referee. He has been a referee in Major League Soccer since 2002 and a FIFA referee since 2007.

Ravshan Sayfiddinovich Irmatov (Uzbek: Ravshan Sayfiddinovich Ermatov, Равшан Сайфиддинович Эрматов, Russian: Равша́н Сайфидди́нович Ирма́тов; born August 9, 1977) is an Uzbek professional football referee. He has officiated in the Uzbek League since 2000, as well as at international level since 2003.

Carlos Alberto Batres González (born April 2, 1968 in Guatemala City) is a Guatemalan football referee. He has refereed FIFA World Cup qualification and final tournament matches, and at Olympic tournaments.

Brian Hall (born June 5, 1961) is an American former soccer referee from northern California. He started his professional career as an assistant referee in the NASL at age 19. Hall was a FIFA referee from 1992 until he retired in 2007 at the mandatory retirement age of 45. He refereed two games in the 2002 FIFA World Cup. He was also named Major League Soccer Referee of the Year in 2003, 2005 2006, and 2007. Hall served as the US Soccer Manager of Referee Assessment and Training up until 2010. He became the first Director of Referees for CONCACAF in December of 2010 and held that post until December of 2013. Brian is currently the Match Official Development Manager for the Professional Referee Organization (PRO).

Fernando Guerrero Ramírez (born 14 September 1981) is a Mexican professional football referee. He has been a full international for FIFA since 2014. He refereed matches in the FIFA U-20 World Cup, FIFA World Cup qualifiers and the 2022 FIFA World Cup.