Hamberg joins from Grasshoppers of Zurich, where he was in charge of the youth set-up, having previously coached in Europe, Africa and the Middle East. He will work alongside John Owens (academy manager) and Malcolm Elias (recruitment).
Chief executive Rick Parry said: "Following the departure of Steve we took the opportunity to review the academy structure and decided to separate the very distinct roles. Piet will come in with the specific brief to head up the coaching and development side, while Malcolm will be in charge of all recruitment."
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