M. Diane Koken has served on Nationwide's board of directors since 2007. She also serves on the board of Nationwide Mutual Fire Insurance Company.
Koken served as the Insurance Commissioner for Pennsylvania from 1997 to 2007. Originally appointed to the cabinet by Gov. Tom Ridge, she also served under Gov. Mark Schweiker and was reappointed and confirmed a third time under Gov. Ed Rendell. She was elected president of the National Association of Insurance Commissioners (NAIC) in an interim election in September 2004 and re-elected for a full year term in December 2004, making her the longest serving NAIC president.
Koken has served as a member of the board for PMSLIC, a medical malpractice company in Pennsylvania, since February 2008. She previously served as a board member of the National Insurance Producer Registry from 2002-2007. In 2006, Koken was elected the first chair of the Interstate Insurance Product Regulation Commission. She also served as vice chair of the International Commission on Holocaust Era Insurance Claims.
Koken graduated magna cum laude from Millersville University and earned a law degree from Villanova University School of Law.
In 1975, Koken began working in the Law Department of Provident Mutual Insurance Company and progressed through various management positions to serve as vice president, general counsel and corporate secretary until 1997.
Currently, she is a consultant, serves on the advisory board for the Center for Ethics in Financial Services at The American College and is a member of the Women’s Council for the United Way.