Joschka Fischer (born 12 April 1948) is a German politician of the Alliance ’90/The Greens. In 1985, he became Minister for the Environment in the Landtag of Hesse. Fischer was again Environment Minister in Hesse from 1991 to 1994, and, later on, became co-chairman of the Greens parliamentary party in the Bundestag. In September 1998, Fischer became Minister of Foreign Affairs. In May 2000, he re-started the discussion about the EU Constitution and defended the federalist approach. From September 2006 until 2007, Joschka Fischer was a senior fellow at the Liechtenstein Institute on Self-Determination and a visiting professor at Woodrow Wilson School of Public and International Affairs, both at Princeton University. Since 2008, Fischer has been employed with the Albright Group, an international strategy consulting firm led by Madeleine Albright.