He joins from Somerfield where he was involved with the development of the Essentials format. He has also worked as an area manager for Save Service Stations and as a store manager with Shell Select.
In a new role for the company, Capper & Co said that Dempsey would ensure that its retail offer and promotional strategies would drive future growth for independent forecourt retailers. The company has a forecourt estate of 84 stores, with a further 26 in the pipeline.
Dempsey said: "I am looking forward to working as part of the team at Capper & Co and I am excited to be given the role to develop new opportunities to drive sales, develop store standards across the 84 existing forecourt sites and to grow the estate."
Bryan Walters, sales director, said: "Mark will make a significant impact on our sales team. I am confident that our forecourt retailers will benefit accordingly."