Home/American Shipper/Ribar to step down as Panalpina’s CEO American Shipper Ribar to step down as Panalpina’s CEO FreightWaves Staff · Wednesday, April 03, 2013 Facebook Twitter Pinterest LinkedInPeter Ulber will become the new chief executive officer of Panalpina June 1, replacing Monika Ribar, who will focus on non-executive managerial roles, according to the Swiss freight forwarder.