Carstensen was a member of the Hamburg Parliament from 2001 to 2005, when he was elected to the Bundestag, the German federal parliament, representing Hamburg Nord, however he lost his seat at the 2009 election.
Carstensen was a member of the Hamburg Parliament from 2001 to 2005. He was elected to the Bundestag representing Hamburg Nord. The Bundestag was the German federal parliament. He lost his seat at the 2009 election.