In her new role, Markey will chair the group’s remuneration committee and also sit on the Risk Committee and Audit Committee.
Markey most recently held the role of group people director for Ocado Group from June 2010 until December 2019.
Prior to this, she worked for Tesco in a number of roles across commercial and group functions, including overseeing the development of a People Vision and Plan for the property function, as well as piloting a corporate leadership development programme.
Markey also served in senior HR roles with Diageo, Merck Sharp and Dohme Limited and Stantons Bakeries, part of Allied Bakeries.
“Julie brings significant experience working in entrepreneurial and innovative businesses, and in creating programmes to develop and manage talent which I believe will be invaluable to our business as we further progress our transformation strategy,” XLMedia non-executive chair Chris Bell said