Date of birth: 14 June 1969
Nationality: Luxembourger
Playing career: Red Boys Differdange, FC Avenir Beggen, Etzella Ettelbrück
Coaching career: Etzella Ettelbrück, Luxembourg U21s, Luxembourg

• Holtz started his career with Red Boys Differdange, a club which today is part of successful outfit FC Differdange 03.

• A creative playmaker with a keen eye for goal, Holtz moved to Avenir Beggen in 1992 where he went to on to win the domestic double in 1993 and 1994.

• He was chosen as Luxembourg's Footballer of the Year in 1993 and played until 2008 when, aged 38, he finished his career at Etzella having moved there from Beggen in 1999 to take over as player-coach.

• Led Etzella to promotion to the top flight in 1999, his first season in charge. Won the cup two years later but was relegated in 2002 only to bounce back immediately. Went on to reach the cup final in 2003 and 2004, although both ended in defeat.

• Having won 55 caps for Luxembourg, he accepted an offer to take over the Under-21 national side in 2008. He was then handed the reins of the senior team following the resignation of Guy Hellers in August 2010.