As a jockey Munce won the Magic Millions 2YO Classic three times aboard Sunblazer, Excellerator and Dance Hero.
On Saturday he carved out his own slice of history when he made the transition to successful trainer, courtesy of Boomsara's thrilling victory in the Magic Millions 3YO Guineas.
Apart from his Millions success as a jockey, Munce is one of a select group of riders to have won Australia's four major Group One races - the Melbourne Cup, Caulfield Cup, Cox Plate and Golden Slipper.
"As a rider I suppose you don't realise or appreciate the hard work that goes into getting horses ready for a day like today," Munce said.
"Now that I'm training you map out plans and hope it all comes to fruition.
"Sometimes it doesn't but today it did. It's a huge thrill."
Jockey Tim Clark allowed Boomsara to cruise across to the lead and was impressed with the gelding's determination when challenged in the straight.
"I probably preferred to draw wide and let him stride across rather than be drawn in and have to bustle him," he said.
"He had to do a bit of work to get across but once he did he travelled comfortably. He couldn't quite get away from them at the top of the straight when he needed to.
"Once he was challenged he was really tough. Bondi went past him but he picked himself up off the canvas and did a great job to win."
Munce paid tribute to jockey Damian Browne who was forced to relinquish the ride on Boomsara on Friday after undergoing emergency abdominal surgery.
"I'm obviously feeling for him as he lies in a hospital bed. I would love for him to have ridden the horse today after riding him so well last start," Munce said.
"I'm certainly thinking of him and wish him well."
A protest by James McDonald, who rode Outback Barbie, against Bondi for interference in the final stages of the Guineas was dismissed.