Marie-Theres Thiell works at RWE since 1990. From 2005 on she was the CFO of RWE Hungary – today innogy Hungary – the regional leading company of RWE in Hungary and in personal union CFO of ELMŰ and ÉMÁSZ, the electricity supply companies in Budapest and north-east Hungary.
In 2010 she became the CEO of RWE Hungária and ELMŰ/ÉMÁSZ. From 2011 until 2016 she was, beside the positions in Hungary, part of the management of RWE East, the management company for the activities of RWE in the CEE region. Here she had besides her regional responsibilities for Hungary and Romania the function responsibility for grid coordination, HR, IT, health and safety and diversity.
Within the split of RWE and innogy, and the functional setup of innogy, she became from 1 April 2016 – besides her positions in Hungary, which she further fulfills in personal union – senior vice president in the Executive Committee for Grid & Infrastructure of innogy SE, responsible for management grid activities in the CEE.