Celtic principal shareholder Dermot Desmond (right) worked with Martin O'Neill during his first spell at the club in the early 2000s [SNS]Celtic's hierarchy have shared their delight following the news that Martin O'Neill has been confirmed as first-team manager on a permanent basis.The 74-year-old guided the side to a Scottish Premiership title triumph and a Scottish Cup success in two interim spells last term.Shaun Maloney and Mark Fotheringham assisted O'Neill last campaign, but there is no m