John Deehan has left Sheffield Wednesday following the sacking of Stuart Gray on Thursday night.
First team coach Deehan arrived at Hillsborough in January 2014 after Gray was appointed head coach on a permanent basis.
The 57-year-old worked with Gray at Aston Villa where they were joint caretaker managers in 2002 between the reigns of John Gregory and Graham Taylor.
Deehan had previously worked as assistant boss at Sheffield United for a year under Steve Bruce.
He played as a striker for West Bromwich Albion, Aston Villa and Norwich City among others, including Barnsley where he finished his professional career.
Deehan was manager of Norwich and Wigan Athletic plus director of football at Northampton Town, Lincoln City, Grimsby Town and Plymouth Argyle.