Meanwhile, Martina King, former managing director of Europe at Yahoo, has announced she will not seek re-election at the AGM in April.
Iddison's experience includes digital and publishing sectors. He was previously chief executive of online games developer and publisher Jagex.
He worked at eBay between 2000 and 2007 and was chief executive officer of PayPal Europe and general manager of PayPal UK from 2003.
King has been a member of the Johnston Press board since 2003 and sits on the company's audit, remuneration and nomination committees. She is a non- executive director of Debenhams, Capita Group and IMD.
On 30 November, Johnston Press began a three-month trial of paywalls across six of its weekly titles - the Whitby Gazette, Northumberland Gazette, Worksop Guardian, Ripley and Heanor News and two Scottish titles, The Southern Reporter and Carrick Gazette.