Morris-Green departs after six years in the post, during which time he has taken the lead on the consortium’s marketing services, and developed the Travel Network Group’s cruise division.
Gary Lewis, chief executive, The Travel Network Group, said: “It is with great sadness that Si has decided to leave The Travel Network Group.
“During the six years that Si has been with us he has driven a strategy that has seen us deliver industry-leading marketing services to our Members and develop a cruise tour operating capability that is growing all the time.
“His overall contribution to our development as a group has been significant and we are grateful for his input, commitment and support over the years.
“Lisa and Vim and I have thoroughly enjoyed working alongside Si and will miss him greatly, as I am sure will many colleagues from across our business.
"However, he leaves us with very strong and talented teams in both marketing and cruise club who we every confidence have the skills and experience to ensure that we keep the member at the heart of everything we do and continue to provide them with a wide variety of creative, innovative marketing and cruise solutions.”
Morris-Green, added: “I’ve had the best time at The Travel Network Group over the past six years and achieved a great deal in terms of my own personal development and growth. After taking a few months off to be with my young family I will be looking for new opportunities in the industry.”
Lewis added he will now consider options to recruit for a new senior marketing position.