On the national level, Hardt was federal chairman of the Association of Christian Democratic Students (RCDS) from 1987 to 1989.
From 2004 to 2009 he served as a member of Wuppertal's city council and chaired the council's committee on economic affairs.

Since 2003 Hardt has been serving as chairman of the Wuppertal county branch of the CDU and since 2005 deputy chairman of the Bergisches Land district branch of the CDU.
On the national level, Hardt was federal chairman of the Association of Christian Democratic Students (RCDS) from 1987 to 1989. From 2004 to 2009 he served as a member of Wuppertal's city council and chaired the council's committee on economic affairs.
Since 2003 Hardt has been serving as chairman of the Wuppertal county branch of the CDU and since 2005 deputy chairman of the Bergisches Land district branch of the CDU.
Jürgen Hardt