Three staff members at A-League club Adelaide United have been made redundant following last week's change of ownership.

Reds youth team boss Joe Mullen today lost his job along with media manager Dom Rinaldo and sponsorship and corporate sales manager Sharon Magro.

The trio have become victims of a restructure at the South Australian club and have all been replaced immediately.

Former Reds captain Michael Valkanis has stepped into Mullen's role and is tipped to have another ex-player, Angelo Costanzo, alongside him.