(Sharecast News) - Chemical ingredients developer Itaconix on Monday confirmed that Michael Norris will serve as interim chief financial officer after the retirement of Robin Cridland on 31 August.Cridland, who's retirement follows a restructuring programme, has been chief financial officer of Itaconix since 2008, co-leading the firm's flotation on the AIM Market in July 2012 and playing a significant role in the company's commercial development and financing.He has also held roles at Coopers & Lybrand Deloitte, Enskilda Securities, GlaxoWellcome and GlaxoSmithKline.John Shaw, chief executive of Itaconix, said: "The board thanks Robin for his dedicated service to the company over many years and wishes him well in his new endeavours. We are pleased to welcome Michael to Itaconix."Norris is a fellow of the Chartered Institute of Management Accountants and has more than two decades of board level experience as chief financial officer at both private and public firms.He has been appointed on an interim basis while Itaconix's board conducts a search for a permanent successor to Cridland.Itaconix's shares were up 2.27% at 2.25p at 1402 BST.