Baillie left Cook in early 2019 after more than two years in the head of retail role and then joined Classic Collection in September as director of agency sales.
Classic Collection chief executive Oliver Garner said: “Michelle Baillie will be leaving us in early March to pursue other opportunities. In her time with the business, we have achieved a huge amount in agency sales.
“I’d like to thank Michelle for her efforts over the past six months and wish her all the best for the future. Agency sales will be reporting directly into me moving forward.”
Before joining Cook in 2016, Baillie was previously divisional sales manager for Tui UK & Ireland, having begun her career working in a travel agency.
