Hilary Ackermann - Vistra Energy Independent Director

Ms. Hilary E. Ackermann is an Independent Director of the company since April 9, 2018. Previously, she served as a director of Dynegy from October 2012 until Dynegys merger with Vistra in April 2018. Ms. Ackermann was Chief Risk Officer with Goldman Sachs Bank USA from October 2008 to 2011. In this role, she managed Credit, Market and Operational Risk for Goldman Sachs commercial bank developed the banks risk management infrastructure including policies and procedures and processes maintained ongoing relationship with bank regulators including New York Fed, NY State Banking Department and the FDIC chaired Operational risk, Credit risk and Middle Market Loan Committees served as Vice Chair of Bank Risk Committee was a member of Community Investment, Business Standards and New Activities Committees was a member of GS Group level Credit Policy and Capital Committees and chaired GS Group level Operational Risk Committee. Ms. Ackermann served as Managing Director, Credit Department of Goldman, Sachs Co. from January 2002 until October 2008, as VP, Credit Department from 1989 to 2001, and as an Associate in the Credit Department from 1985 to 1988. Prior to joining Goldman, Sachs, Ms. Ackermann served as Assistant Department Head of the Credit Department of Swiss Bank Corporation from 1981 until 1985. Ms. Ackermann currently serves on the private board of directors of Credit Suisse Holdings, Inc. and each of Hartford Series Fund, Inc., Hartford HLS Series Fund II, Inc., The Hartford Mutual Funds, Inc. and The Hartford Mutual Funds II, Inc. and previously served on the public board of directors of Apollo Investment Corporation since 2018.