Terry Clontz, the telecoms industry veteran who was last month appointed to the board of Eircom to represent majority owners Singapore Technologies Telemedia (STT), has been appointed chairman of Nasdaq-quoted InterDigital.

Mr Clontz stepped down as chief executive of StarHub, STT’s mobile subsidiary in Singapore, last month and now manages its investments in the US and Europe. InterDigital holds a number of patents for technology used in 3G mobile phones. Mr Clontz has been a director of the firm since 1998.