Until today, Parfitt was yet to recommit to the club beyond this year, but has now signed on for a further two years in pledging his allegiance to Geelong.
The 24-year-old was drafted to the Cats as the 26th overall selection in the 2016 National Draft, arriving from the Northern Territory.
“I’m very happy at Geelong," Parfitt told the club's website.
"I enjoy being part of this playing group and love everything about the Club."
Parfitt made his return to playing last Saturday night against the Bulldogs, coming into the game as the medical sub in place of forward Gary Rohan.
The comeback performance was Parfitt's first since fracturing his hand earlier this year, before contracting COVID toward the end of his recovery.
Cats football boss Simon Lloyd expressed his delight in having Parfitt recommit to the club for the coming years, with the young onballer set to add to a bright career so far in the hoops.
"Brandan is an important part of Geelong and our plans moving forward. He has shown to be an integral part of our midfield with his football smarts and physicality," Lloyd said.
“It has been pleasing to see Brandan’s development through our system, he has worked very hard and we have no doubt he will continue to improve and take his game to the next level.”
In the mix for his first full game since Round 12, Parfitt is likely to line up against St Kilda in Saturday night's game at GMHBA Stadium.