Rubio's promotes from within to fill the leadership vacancy created by Pittard's resignation.

Marc Simon was promoted to president and chief executive officer of Rubio's Restaurants, Inc. Simon replaces Daniel Pittard, who resigned from the president and CEO post. Pittard will remain on Rubio's board of directors.

Simon served as Rubio's chief operating officer since Sept. 2009 and was senior vice president of operations from Nov. 2007 to Sept. 2009. Simon's restaurant industry experience also includes working with McDonald's Corp., Chipotle and America's 2 Incredible Pizza Co. He also spent 16 years with consulting firm Ernst & Young.