Davis previously served as a member of the managing board for Siemens AG with responsibility as CEO for Siemens Gas and Power. Prior to Siemens, she was EVP of downstream strategy, portfolio and alternate energy, for Royal Dutch Shell PLC. She began her career at Chevron Corp., at Exxon USA and then at Texaco Refining and Marketing Inc. 1986 Exxon Corporation, USA - Engineer, Western Region Production 1988 Texaco, USA - Engineer, R&D Business Development - Engineer, Manufacturing Process Engineering (from 1990) - Supervisor, Manufacturing Operations Planning (from 1993) - Manager, Manufacturing Operations (from 1996) 1998 Royal Dutch Shell, USA - Vice President, Manufacturing Operations & Maintenance - Vice President, US Strategy & Portfolio (from 2000) 2003 Royal Dutch Shell, UK - Manager, Financial Reporting & Planning - Vice President, Hydrocarbon Supply Europe (from 2004) 2008 Royal Dutch Shell, USA - Vice President, Sales and Marketing Lubricants & Bulk Fuels Americas 2012 Royal Dutch Shell, UK - Executive Vice President, Strategy, Portfolio & Alternative Energy August 2014 Member of the Managing Board of Siemens AG Studied chemical engineering at University of California, Berkeley, USA Bachelor of Science