As part of the merger between Tui Travel and Tui AG, Long was slated to move upstairs with Friedrich Joussen becoming sole chief executive.
However, in a statement Tui said that Long will instead become just a member of the supervisory board.
Klaus Mangold the current chairman will remain in the role.
A spokesperson for Tui told TTG that the reason for the change of heart was corporate governance regulations in the UK and Germany.
