This excerpt taken from the PLAB DEF 14A filed Mar 2, 2009.
Constantine S. Macricostas has served as Interim Chief Executive Officer since July 20, 2008. From February 23, 2004 to June 7, 2005, he also served as Chief Executive Officer. From January 2002 through March 2002, he temporarily assumed the position of President. Mr. Macricostas also served as Chief Executive Officer of the Company from 1974 until August 1997.