Chris Guy, formerly of Loungers and the Casual Dining Group, will join Brasserie Bar Co as financial director later this month.
The position was previously held by Helen Melvin who takes on the newly created role of director of people with the company behind Brasserie Blanc and the White Brasserie pub group.
Melvin will be responsible for the teams delivering HR, recruitment and learning and development.
Brasserie Bar Co incorporates 19 Brasserie Blanc sites and 17 pubs under the White Brasserie brand.
Chief executive Mark Derry said: "The people and teams within our business are of paramount importance to us as we continue to grow. Helen has always had one eye on the people side of our business, this experience together with the strategic approach that she has always demonstrated in her current role makes her the ideal choice to head up our people function.
"Chris's wealth of experience in managing the finances within growing, multi-unit businesses will be invaluable as the brands continue to expand. We are delighted to have him on board."