Moody followed Mackay from Watford when the Scot joined the Bluebirds in 2011, and has played a key role in the acquisitions of the likes of Steven Caulker, Gary Medel, Kevin Theophile-Catherine and Fraizer Campbell.
The reasoning behind Moody's suspension is unknown, but it is understood Kazakhstani Alisher Apsalyamov, thought to be a friend of owner Vincent Tan's son - who appears to have no previous experience in football - has taken over from him in an acting capacity.
The decision to suspend Moody, whose work in the scouting and recruitment of players has been publicly praised by Mackay, comes just a matter of days after it was revealed Tan and the Bluebirds squad had been at loggerheads over end-of-season bonus payments.
Mackay confirmed following Saturday's 2-1 defeat to Newcastle that a resolution has been reached over the issue, but Cardiff's players are reportedly no longer happy for Tan to be in the dressing room on matchdays.
Source: PA
Source: PA