Education
University of Oslo.
politician member of the Parliament of Norway
University of Oslo.
She was elected to the Norwegian Parliament from Buskerud in 2005. Outside politics she graduated as candidate.mag. from the University of Oslo in 1979, and took the master"s degree in political science in 1989. She was a research fellow there from 1982 to 1983, and a researcher at Institutt for sosialforskning from 1989 to 1995.
On the local level, Christoffersen was a member of Drammen city council from 1983 to 2003, serving as deputy mayor from 1991 to 1995 and mayor from 1995 to 2003.