Publicis Groupe’s Epsilon announced the appointment of Sean Reardon as CEO. The role has been vacant for several years. 

The appointment, effective by year’s end, marks Reardon’s return to the holding company, having earlier served as CEO at Zenith.  

Most recently he was CEO of Dentsu’s Americas Media Practice, which he left in May after about a year-and-a-half in the role. Prior to that he was CEO at marketing intelligence firm MiQ. 

John Giuliani, Epsilon’s executive chairman, will work with Reardon to lead the data and analytics unit and both will report to Dave Penski, CEO, Publicis Connected Media. Reardon will also join the Publicis Groupe Management Committee. 

“I have no doubt the addition of Sean’s leadership will only amplify Epsilon’s current success,” Penski stated.