Jones has been promoted to senior commercial manager and Turney will take on the role of commercial manager. They will both report to head of commercial John Sullivan.
Turney brings more than 20 years’ travel experience to the role having previously held positions with Thomas Cook, The Freedom Travel Group and Club Med.
She said: "I’m excited to be joining the Advantage team and I’m looking forward to working closely with our commercial suppliers and developing an in-depth understanding of our members’ businesses to find the best opportunities to support them."
Jones, who has been a part of the commercial team for the past 10 years, said: "I’m truly delighted to be taking on this role to continue driving our partnerships forward and ensuring our members remain at the heart of everything we do."
Sullivan said the appointments have been made to "ensure the business can proactively support the current and future needs" of its members.
"As a business we pride ourselves on our commercial offering to members, and the exceptionally strong supplier relationships," he added.
Senior commercial manager Kerri Thorpe will be taking a sabbatical to travel to Australia before returning to the business early next year.