Dee ihe na-aga n'ihu maka paragraf a - Van Rooijen mere ọkwa mbụ ya na mba ụwa na European LC Championship 1999 na Istanbul, Turkey na ebe 4 na 4 × 100 m freestyle na 4 × 100 m medley relay. Ka otu afọ gachara, ọ maliteghachiri asọmpi European LC Championship.
n'oge a, e mere ya na Helsinki, Finland. N'ebe ahụ ọ malitere n'otu n'otu na 100 m na 200 m freestyle na-ejedebe 17 na 24th. Na 4 × 200 m freestyle relay enwere ebe 7. N'ọnwa Septemba 2000 ọ gara asọmpi Olympic nke Sydney ebe o meriri ọla ọcha na 4 × 100 m freestyle relay ya na Inge de Bruijn, Wilma van Hofwegen na Thamar Henneken. Enwekwara ebe nke iri na otu na 4 × 200 m freestyle.