Printing company R. R. Donnelley & Sons Co. said Thursday that Chief Operating Officer John Paloian is retiring.

Paloian has been the company's COO since April 2007. He will be replaced by Daniel Knotts, who has worked for Donnelley since 1986. Knotts, 48, is currently the company's group president and previously led its financial services unit.

In October Donnelley was blamed for accidentally releasing Google Inc.'s earnings report earlier than planned. The report was made public about three hours ahead of schedule.