ION Geophysical Corporation announced that on December 31, 2012, Robert P. Peebler retired as Executive Chairman of its Board of Directors, and ION Board member James M. "Jay" Lapeyre, Jr. became ION's Chairman of the Board. Mr. Peebler served as the company's President and CEO from 2003 until January 1, 2012, when R. Brian Hanson become the company's President and CEO and Mr. Peebler transitioned to Executive Chairman. Mr. Peebler will continue to serve ION as a consultant to the company and its Board of Directors.