Greencore has appointed Mr John McNamara as chief executive of Greencore Malting Group. The appointment takes effect from October 1st, 2001. Mr McNamara replaces Dr Sean Brady who will become chief executive of Irish Sugar following Mr Tony Heaphy's retirement on September 30th. Mr McNamara is currently operations director of the malting group's Irish business, Minch Malt Ltd, a position he took up four years ago.