Career
After the Olympics Vellenga, Gabriëls, Vermeulen and Geert Cirkel started a new mission on the road to the 2008 Summer Olympics in Beijing with the fours. Their formation was successful straight away with a second place in the 2005 Luzern World Cup as well as the World Championships in Gifu that year. In 2006 they got another second place in Luzern and a third in Munich.
They were the team to beat in 2007 after winning the World Cup in Luzern and becoming second in both Amsterdam and Linz.
However at the 2007 World Championships in Munich they had to be satisfied with another bronze medal. At the 2008 Olympics, the Dutch coxless four finished eighth.
At the 2012 Summer Olympics, Vallenga again took part in the men"s eights, finishing in 5th place.