Sharon Smith, head of sales and distribution for Great Rail Journeys, is to leave the company.
The company said a search has been initiated for a permanent replacement.
Alex Roberts, group sales and marketing director said: "Sharon has been key to the growth of Great Rail Journeys Limited over the last three years and has made a big impact in developing our trade sales.
"Sharon will be very much missed within the business – and no doubt the agents that support us – but we wish her well in her future ventures.
"A succession plan for Sharon is well underway and an announcement will be made in the near future".
Sharon joined the operator in 2014 and headed up the group escorted touring call centre, tailor-made FIT call centre, UK & Ireland travel trade partnerships as well managing the national business development team.
