Parliamentary Secretary and Spokesperson for Nature Conservation of Bündnis 90/Die Grünen (the Greens) parliamentary group Member, Committee on the Environment, Nature Conservation and Nuclear Safety, his profession study of agricultural sciences at Humboldt University, Berlin.
On 2013 was a member of the Bundestag, Federal party manager of the Greens, between 1998 to 2002 was Parliamentary Secretary of the Greens parliamentary group, Member of the Council of Elders, just for mention.