A-League boss Greg O'Rourke insists there is no cause for concern at incoming expansion club Macarthur FC despite a concerning turnover of key personnel, which continued with the departure of football director Ken Stead.

High-performance guru Stead, who worked closely with Ange Postecoglou during his successful tenure at Brisbane Roar, was appointed in October to a wide-ranging role at the head of Macarthur's football department.

Football director Ken Stead has been made redundant at Macarthur FC.

Trumpeted as a "major off-field signing" at the time, Stead was to have oversight of not only the A-League team but all academy and community football structures beneath it.

But his role was made redundant this week, club sources said, in the latest round of behind-the-scenes changes at the Campbelltown-based club.