Samuel M. Mencoff. Mr. Mencoff is 51 years old and has served as a director of PCA since January 1999 and served as Vice President of PCA from January 1999 through January 2000. Mr. Mencoff has been employed principally by Madison Dearborn Partners, LLC, a private equity investment firm, since 1993 and currently serves as Co-Chief Executive Officer. From 1987 until 1993, Mr. Mencoff served as Vice President of First Chicago Venture Capital. Mr. Mencoff is a member of the board of directors of Smurfit Kappa Group Limited.