The St Mirren boss was one of seven members of staff who tested positive for coronavirus at a private testing facility.
Development comes after seven St Mirren coaching staff members tested positive for coronavirus.
The Tynecastle side are four points adrift at the foot of the Scottish Premiership after a 1-0 loss to St.Mirren
Celtic have increased their lead at the top of the Scottish Premiership to 16 points with a win over St Mirren.
