Phil Martin has stepped down from his role as executive director of buying group Cedabond as of 31 July.
Martin joined Cedabond in December 2012 and has seen extensive changes and growth within the company during his tenure.
Mike Nunn, Cedabond chairman, said: "We wish Phil all the best with his plans for the future. We would like to thank him for the fantastic job he has done over the past seven years, in particular for doubling the membership and more than doubling the turnover."
Martin added: "I have had a good seven years with Cedabond and, with the financial climate as it is today, came to an agreement with the board to step down now rather than at the end of the year. I leave Cedabond in good hands and wish them all the best for the future."