Sunderland director of football Roberto De Fanti has left the club.
The Italian oversaw a raft of big-money signings during former boss Paolo Di Canio's reign.
Fourteen players arrived on Wearside during the summer transfer window last year, incurring a total outlay of £19.38m.
Emanuele Giaccherini, who cost £6.5m, was the most expensive acquisition while nine players left the club, bringing in £19m; Simon Mignolet accounted for nearly half of that when he moved to Liverpool in a £9m deal.
A club statement said: "Sunderland AFC has announced that the club has parted company with director of football Roberto De Fanti.
"The club would like to place on record its thanks to Roberto and wishes him well for the future."
In the interim, chief executive Margaret Byrne, who was responsible for the administrative side of transfers before De Fanti's arrival, will resume that responsibility with Argentinian defender Santiago Vergini having arrived on Wearside this week with a view to tying up a move.