already as a student bilger joined the young union in 1996 and was also a member of the cdu. from 1998 to 1999 he served as chairman of the baden-württemberg land branch of the pupils' union and from 1998 to 2000 as federal managing director of the pupil union germany. in 2006, bilger was elected chairman of the junge union baden-württemberg and was confirmed in office in the years 2008, 2009 and 2010.