Despite overseeing Perth's grand final appearance last season, Glory chief executive Paul Kelly has resigned from the A-League club after three years in the role.Kelly, who will see out the month before relinquishing his post, will remain on the club's board.Glory deputy chairman Lui Giuliani is set to take over from Kelly for the remainder of the season, unless a replacement can be found in the meantime.Perth were in a state of turbulence early in Kelly's tenure, with coach Dave Mitchell stepping aside in October 2010 before Perth finished a club-worst 10th.The pressure on the club continued to rise early last season after a slow start to the campaign.But the Glory finished in a flurry under coach Ian Ferguson, with the club reaching the grand final before losing 2-1 to Brisbane Roar in heartbreaking fashion.Perth, who sit sixth on the table this season, are just two points adrift of fourth-placed Newcastle ahead of Saturday night's clash with Melbourne Heart at AAMI Park.And with the Glory still in the mix to snare the services of superstar David Beckham, the timing of Kelly's departure seems unusual.Glory skipper Jacob Burns, who will return from suspension against the Heart, said he was unsure of the reasons behind Kelly's departure."We wish him well and thank him for the support he's given us through his time here," Burns said on Wednesday."He's done a fantastic job and I'm sure he'll go on to do well in other things."Through last year, it was up and down and, in the end, we pushed this club to where I think it should be. He had a major part in that as well."