Matthew Costello is the most senior exec to step down after string of high-profile departures, Bloomberg reports

HTC Chief Operating Officer Matthew Costello has joined the list of high-profile executives to step down, according to a report from Bloomberg. Costello becomes the most senior employee to leave his job at the Taiwanese manufacturer, after a series of high-profile resignations were reported last month. According to an internal email seen by Bloomberg, HTC's president of engineering and operations Fred Liu will take over Costello's duties in a new, expanded role. Costello, the publication reports, will stay on in an executive advisory role following a move to Europe.

News of Costello's departure comes soon after the company reported improved May 2013 revenues following the launch of its flagship HTC One smartphone. However HTC has seen its market share and revenues dwindle over the past year, only recently showing signs of a turnaround off the back of the HTC One launch.

Other recent HTC departures have included the manufacturer's Asia CEO Lennard Hoornik, EMEA president Florian Seiche and Chief Product Officer Kouji Kodera.

Source: Bloomberg