1997, joined Siemens, Germany, as Product Line Manager, Wireless Internet, Wireless Network Group. 2001, Market Development Manager, Cisco Systems, Germany; 2004, Director, Sales Business Development, Worldwide Product Sales, Cisco Systems, USA; Director, Engineering and Systems Development, Cisco Development Organization, Research and Development; 2008, Vice-President, Delivery and Sales, Europe, Middle East, Africa and Russia, Cisco Services; Senior Vice-President, Global Service Provider, Service Delivery Worldwide; Senior Vice-President, Global Service Provider, Sales, Europe, Middle East, Africa, Russia and Asia-Pacific Japan, Cisco Systems, Germany. April 2017, Member of the Managing Board, Siemens. Since 2020 Oct CEO Digital Industries