Formerly a policy manager at Uber, Samoilovich joined Ryanair in February as its first head of public affairs, and was tasked with "working with the EU to increase the competitiveness of the European air transport industry".
However, he left the role in February, PRWeek has learned, in order to take up a position with the United Nations, based in Paris. It was not possible to confirm the nature of that role and Samoilovich has not updated his LinkedIn or Twitter biographies.
Ryanair has since appointed a new director of public affairs, Diarmuid O’Conghaile, who will join the airline on 1 July.
He will also focus on regulatory work in Brussels but is not expected to relocate full-time to the Belgian capital.
O’Conghaile was previously head of economic regulation at Dublin Airport Authority - Dublin Airport being Ryanair's second busiest location after London Stansted.
He is also a published author with his debut work, the comic novel Being Alexander, hitting the shops in October last year.