Since 1997 CHRISTNER is admitted to the bar of Frankfurt / Main, Germany.
From mid of 2007 to end of 2009 und since 2013 CHRISTNER is acting full-time and independent as Rechtsanwalt. From 2010 to 2012 CHRISTNER served as divisional head Legal & Compliance at Q-Cells SE. Earlier, from 1996 to 2007, CHRISTNER acted in various functions in the areas legal and communications at Hoechst Aktiengesellschaft and at Celanese AG.
Due to many years of experience in senior positions in international companies CHRISTNER has a proven expertise in the Management of international groups especially in the areas chemicals and energy. The concentration on selected areas reflects CHRISTNER's longtime practical experiance.