Richard Ali is to step down as chief executive of the English Beef and Lamb Executive at the end of the month.
Ali, who joined Eblex in January 2005 to develop the organisation's strategy, governance and activities, said he was leaving to pursue new opportunities.
Richard Lowe, chief executive of the Meat and Livestock Commission, has been named as interim CEO of Eblex until a permanent replacement for Ali is found.
"Richard has played an integral role in implementing the board's strategy for English beef and sheep. I thank Richard for his contribution and support and wish him well for the future," added chairman John Cross.