Fitzsimmons saddles his first Melbourne Cup (3200m) runner at Flemington on Tuesday when Onesmoothoperator lines up for his third attempt at the race.
And Fitzsimmons would like nothing more than to complete his own 'Laxon set' with a Melbourne Cup trophy to go alongside his Singapore Champions Trainers' title.
For Fitzsimmons, just to have a Cup runner so early in his career after relocating from Singapore is a thrill.
"It's certainly a bit different to any other race with all the protocols we have to go through," Fitzsimmons said.
"It's exciting and will probably hit home on Tuesday when they're in the parade ring and heading to the barriers.
"I'll have to pinch myself."
Before heading to Singapore in 2007 to work for Cliff Brown, Fitzsimmons had stints with the 'Cups King' Bart Cummings and with the Cup's most successful owner Lloyd Williams.
A friendship born with UK trainer Brian Ellison, Onesmoothoperator's previous trainer in late 2006 led to Fitzsimmons getting the gelding to train.
Fitzsimmons travelled to Perth with Ellison for a Perth Carnival in 2006, establishing a long family friendship.
Travelling from the UK with Ellison, Onesmoothoperator finished 12th in the 2024 Cup before running 14th last year.