Following the takeover of the company by the Georg-Fischer Group, Suess was named Chairman of the Managing Board of GF Mössner GmbH.
In 2001, he took on the role as Chief Operating Officer at MTU Aero Engines GmbH in Munich and was responsible for production, development and procurement.
From April 2011 to May 2014, he was a member of the Managing Board of Siemens AG and CEO of the company’s Energy Sector.
[2][3] Since 2010, Suess has been holding a supervisory Board position at Herrenknecht AG, a world market leader of tunnel drilling rigs in Germany.
Suess has been a guest lecturer at the Technical University Munich since 2013, from which he was awarded an honorary professorship in 2015.