Career
Siegelaar took part in the World Championships of 2003 in Milan winning the silver medal in the fours. With the Dutch eights she qualified for the 2004 Summer Olympics in Athens and she and her team mates rowed to the bronze medal. In 2007 she returned to the eights in which the Dutch only became seventh at the World Championships.
She qualified for the 2008 Summer Olympics in Beijing with the Dutch eights forming a team with Femke Dekker, Annemiek de Haan, Roline Repelaer van Driel, Nienke Kingma, Annemarieke van Rumpt, Marlies Smulders, Helen Tanger and cox Ester Workel.