Referee since 1994.
International referee since 2003.
From 2003 in ULEB.
Refereeing EUROLEAGUE and ULEB CUP games.
Heading for World Championship in Czech Republic 2010
Eurocup Final Eight in 2009 in Torino. U19 World Championship in Bratislava in 2007, U19 World Championship in Bangkok in 2009 Attend several camps in Europe.
Past Camps
Daniel Hierrezuelo
1990 started to officiate 1995 first game in ACB league (670 ACB league games, 14 King Cup, 18 Final games)
2000 became an international referee
2005 became Euroleague referee
Career highlights:
2001 Mediterránean Championship
2004 Final Four Fiba Thessaloniki, World championship junior Thessaloniki
2005 Eurobasket Women, Greece
2005 Afrobasket Algieria
2007 Afrobasket Angola
2008 Final Four Euroleague Madrid
2008 Preolimpico Athens
2009 World Championship U19 New Zealand
2009 Eurobasket Poland
2010 Final Four Euroleague Paris
2014 Internacional Cup Río de Janeiro
Ronnie Nunn

Director of Officials
National Basketball Association
Ronnie Nunn, the NBA’s Director of Officials, is a veteran of 23 NBA seasons. During his officiating career, which spanned 19 seasons, Nunn worked 1,134 regular-season, 73 playoff and four NBA Finals games, as well as the 1996 NBA All-Star Game, the 1993 McDonald’s Championship in Munich, Germany, the NBA Japan Summer Charity Games in 1996 and the 2000 Mexico Challenge. He has also been involved in the WNBA’s mentor program and is an NBA instructor during the summer.
Nunn handles the day-to-day management of the officiating staff, including daily instruction on the correct application of NBA playing rules. He reports directly to Stu Jackson, Executive Vice President,
Basketball Operations.
Prior to joining the NBA as an official, Nunn officiated in the CBA for two years, and officiated Pro-Am basketball in New York City for two years. He also has one year of high school officiating experience in New York and New Jersey, and worked as a special education teacher for 10 years.
Nunn was an assistant coach at Pace University from 1978-1980 and at his alma mater, Brooklyn Tech High School from 1976-77. He played professionally on the National Basketball Circuit of Mexico from 1972-74 and was named MVP in 1973, and Best Player of the Decade (1970s). Nunn played collegiate basketball for three seasons at George Washington University where he became the Colonials’ leading scorer and a member of the 1,000 points club in 1972. He was inducted into the George Washington University Hall of Fame in 1997 and named to the school’s All-Century Team. Nunn received his undergraduate degree from George Washington and an M.S. at the College of New Rochelle and an M.S. at Queens College.
Nunn, along with his wife, Andee, an American Studies teacher at Danbury HS, has established the Nunn-Better Scholarship Award, given to students of diverse backgrounds who have demonstrated academic excellence and have overcome other obstacles in their lives. The award is offered
to students of Danbury High School and The Hord Foundation.
Born and raised in Brooklyn, N.Y., Nunn currently resides in Danbury, Conn. He is the father of two daughters, Ilana who works as a publicist, and Alexi who works as an attorney. He is also a member of the local NAACP and Danbury’s Concerned Black Men, an organization that tutors and mentors minority students.
In 2009 in Katowice Ronnie was an instructor at EMW Referee’s Camp.
Check “Officials Time Out” by Ronnie Nunn
Check “Double Dribble” by Ronnie Nynn
Dariusz Lenczowski
Former basket ball player, youth and juniors until age 20.
At age 17 made first steps in refereeing. In 1998 approved for officiating top division in polish league. June 2003 received FIBA license.
Season 2005/2006, 2007/2008 – Polish men finals
2008/2009 – Polish women finals, 2008/2009 SBL finals, Taiwan, Taipei.


Participant of many internationals tournaments including European Championship Man U-18, U-20 and European Championship Women U-16 and U-18.
Robert Vyclicky
Referee since 1994.
International referee since 2003.
From 2003 in ULEB.
Refereeing EUROLEAGUE and ULEB CUP games.
Heading for World Championship in Czech Republic 2010
Eurocup Final Eight in 2009 in Torino. U19 World Championship in Bratislava in 2007, U19 World Championship in Bangkok in 2009 Attend several camps in Europe.
Dariusz Zapolski
Referee since 1995
Top Polish league since 2004
FIBA referee 2012
Participated in 4 REFEREE.PL camps.


Ronnie Nunn

Director of Officials
National Basketball Association
Ronnie Nunn, the NBA’s Director of Officials, is a veteran of 23 NBA seasons. During his officiating career, which spanned 19 seasons, Nunn worked 1,134 regular-season, 73 playoff and four NBA Finals games, as well as the 1996 NBA All-Star Game, the 1993 McDonald’s Championship in Munich, Germany, the NBA Japan Summer Charity Games in 1996 and the 2000 Mexico Challenge. He has also been involved in the WNBA’s mentor program and is an NBA instructor during the summer.
Nunn handles the day-to-day management of the officiating staff, including daily instruction on the correct application of NBA playing rules. He reports directly to Stu Jackson, Executive Vice President,
Basketball Operations.
Prior to joining the NBA as an official, Nunn officiated in the CBA for two years, and officiated Pro-Am basketball in New York City for two years. He also has one year of high school officiating experience in New York and New Jersey, and worked as a special education teacher for 10 years.
Nunn was an assistant coach at Pace University from 1978-1980 and at his alma mater, Brooklyn Tech High School from 1976-77. He played professionally on the National Basketball Circuit of Mexico from 1972-74 and was named MVP in 1973, and Best Player of the Decade (1970s). Nunn played collegiate basketball for three seasons at George Washington University where he became the Colonials’ leading scorer and a member of the 1,000 points club in 1972. He was inducted into the George Washington University Hall of Fame in 1997 and named to the school’s All-Century Team. Nunn received his undergraduate degree from George Washington and an M.S. at the College of New Rochelle and an M.S. at Queens College.
Nunn, along with his wife, Andee, an American Studies teacher at Danbury HS, has established the Nunn-Better Scholarship Award, given to students of diverse backgrounds who have demonstrated academic excellence and have overcome other obstacles in their lives. The award is offered
to students of Danbury High School and The Hord Foundation.
Born and raised in Brooklyn, N.Y., Nunn currently resides in Danbury, Conn. He is the father of two daughters, Ilana who works as a publicist, and Alexi who works as an attorney. He is also a member of the local NAACP and Danbury’s Concerned Black Men, an organization that tutors and mentors minority students.
In 2009 in Katowice Ronnie was an instructor at EMW Referee’s Camp.
Check “Officials Time Out” by Ronnie Nunn
Check “Double Dribble” by Ronnie Nynn
Dariusz Lenczowski
Former basket ball player, youth and juniors until age 20.
At age 17 made first steps in refereeing. In 1998 approved for officiating top division in polish league. June 2003 received FIBA license.
Season 2005/2006, 2007/2008 – Polish men finals
2008/2009 – Polish women finals, 2008/2009 SBL finals, Taiwan, Taipei.


Participant of many internationals tournaments including European Championship Man U-18, U-20 and European Championship Women U-16 and U-18.
Stelios Koukouleikidis
Greek National league A1 referee from 1990 to 2009
FIBA referee from 1992 to 2011
Euroleague referee 2000-2009
Major tournaments: Olympic Games 1996 Atlanta
Europe U18 men (1994, 1997, 2006)
World U18 Men (1995, 1999)
Final 4 women 1994 Poznan
Dariusz Zapolski
Referee since 1995
Top Polish league since 2004
FIBA referee 2012
Participated in 4 REFEREE.PL camps.

