Career
In indoor volleyball Mooren started her career in 1989 at Allides Haarlem where she was part of the youth teams. The Dutch youth team called her up in 1996 and she was part of the team until 2000, winning a silver medal at the European Youth Championships. From 1997 until 2002 she played for Martinus Amstelveen in the highest Dutch league.
Then she decided to switch sports to beach volleyball.
She started her international beach volleyball career in 2002, teaming up with Mered de Vries. They quickly became one of the best teams in The Netherlands.
They even became Dutch champions by breaking the run set by Rebekka Kadijk who was teaming up with Marrit Leenstra at that time. After the 2004 Summer Olympics Kadijk/Leenstra decided to split up.
The combination Kadijk/Mooren was nearly unbeatable in their own country.
In 2005 and 2006 they became Dutch national champions. In both 2005 (Moscow) and 2006 (Scheveningen) they reached the final of the European Championships.