She made her debut for the Netherlands national team on 20 June 2003 in a game against South Africa.

In 2008, Van As became an Olympic gold medal winner with her national team at the 2008 Summer Olympics in Beijing, scoring the first goal in their 2–0 win over China.

[3] At the 2012 Summer Olympics, she was again part of the Dutch team that won gold.

[3] She finished her international sportive career at the 2016 Summer Olympics in Rio de Janeiro in the by shoot-outs lost final against the team of Great Britain.

[5] In 2012, Van As was made a Knight of the Order of Orange-Nassau after she and the fellow members of her hockey team won the women's field hockey tournament at the 2012 Summer Olympics.