Count Diego du Monceau de Bergendal is a Belgian businessman. He is Vice Chairman of the Board of the GIB-group, and Managing Director of Rainyve SA/NV. The GIB Group is one of the largest Belgian retail groups which operates through its three main subsidiaries: Quick Restaurants, Lunch Garden, and Disport. Diego du Monceau de Bergendal is a member of the Belgian business club Cercle de Lorraine.