Education
University of Oslo.
politician member of the Parliament of Norway
University of Oslo.
De Ruiter was elected to the Norwegian Parliament from Aust-Agder in 2005. He had previously served as a deputy representative during the terms 1993–1997 and 1997–2001. He has chaired the local party chapter since 2004.
Outside politics de Ruiter worked as a high school teacher.
He was education at Agder University College, the University of Bergen and the University of Oslo.
On the local level de Ruiter was a member of Arendal city council from 1991 to 1995 and Aust-Agder county council from 1995 to 2007.