Preston Johnson, Jr. Senior Vice President, Human ResourcesMr. Johnson has been our Senior Vice President, Human Resources since May 2008. Previously, he served as Vice President, Global Human Resources and Health Services at Anadarko Petroleum Corporation (a global oil and natural gas exploration and production company) from October 2005 to May 2008; Senior Vice President for Human Resources and Business Services at CenterPoint Energy, Inc. (an electric, gas, pipeline and power distribution and delivery company) from March 2000 to October 2005; and Global Director, Human Resources at The Dow Chemical Company (a diversified chemical company) from June 1977 to March 2000.