Gavoyannis previously worked as head of business strategy at Q Research, and was also head of TNS’s global technology division. He has also held senior management positions at BT, Motorola and Orange.

New York-based Radius launched its EMEA division at the end of last year, and Gavoyannis will be focused on growing its technology business in the region.

Michael Fodor, managing director of Radius EMEA, said: “Tacis brings unrivalled market research, sector and business development expertise to our recently launched European operation. We are delighted to have someone of his calibre joining the managment team.”