Conix will succeed Horst Baier when he steps down in the autumn after 22 years with the group.
She will join Tui’s executive board on July 15.
A manager with international experience across multiple sectors, Conix joins Tui from her role as chief finance officer at Belgian media and telecoms group Telenet.
Prior to her role at Telenet, Conix was senior finance director Western Europe at Heineken and has held management and leadership roles with Johnson and Johnson and its subsidiaries.