O’Neill played 27 games and scored three goals on route to lifting the trophy last Sunday, defeating Melbourne Victory 4-2 on penalties after scores were 1-1 after 120 minutes.

The Irish-Aussie enjoyed game time with Sydney since joining in 2015 after he barely played at Glory.

He admits he wouldn’t have envisaged the success two years ago while at a crossroads as to whether to continue his footballing career.

“It was probably the first thing that ran through my mind after the game,” O’Neill told FourFourTwo.

“I sat down with Arnie (coach Graham Arnold) and our strength and conditioning Andrew Clark and we sat down and just to talk about where I’ve come from.

“The 24 months I’ve been through… I was playing youth league at Perth Glory not knowing where I’d be next and whether I’d be back in the NPL.

“All of a sudden I’m scoring a crucial penalty in a grand final, it’s just an amazing feeling to think back to what you’ve been through and celebrate what you’ve just achieved, it’s something special.”

O'Neill's got the toilet seat... literally

Milos Ninkovic was the hero for Sydney scoring the winning penalty with the Serbian re-signing Tuesday on a one-year deal.

O’Neill said he couldn’t be happier with this season adding joining Sydney was the best decision he’d made during his football career.

And with the poor record Australian clubs have in the AFC Asian Champions League (ACL), O’Neill said he hoped to win all three competitions after falling short in last year's FFA Cup final.

“There won’t be a case of us sitting down and favouring one competition, we want to win all three,” he said.

“We’ll work out the best possible to do it because we have the team, facilities... we have everything possible you can imagine to go and win the ACL. That’ll be our main focus next year, to back up what we’ve done this year.”

“I know Ninka is very happy in Sydney and loves the club, people. It was always going to be a case if he could stay he would and I’m just so thankful I get to spend another season with such a top quality player and person as well.

“He’s one of me neighbours at Breakfast Point, we see him regularly down this way and he’s just a pleasure to have around the club and a pleasure to play with so I’m delighted he’s sticking around.”