Carl Fysh, who was unavailable for comment, is understood to have left after around seven years at the firm, in which time he held a variety of press office roles.
The remaining members of Sony’s UK press office, understood to have around six staff, declined to comment on Fysh’s departure or speculate on a successor.
Sony Music vice-president communications Gary Farrow would only confirm that Fysh – once a member of the late-1980s band Brother Beyond – had left the company.
Sony and Bertelsmann agreed to merge their music businesses last month. The deal awaits approval from the European Commission.