"There's respect, there's discipline, there's structure, and I think you can translate that from boxing into everyday life."
He said getting more boxing programmes into schools is key to growing the sport further nationwide.
That way the sport could be introduced to more children, rather than how currently they need a pre-existing interest in the sport to go and seek out a club.
Youth Trust founder Craig McDougall said they were buzzing and humbled to have someone like Parker support their work.
"The primary goal of the Giants is to build confidence in these young people, and to allow them to strive to achieve the life they want for themselves," he said.
"A huge part of that work is connecting young men and women with positive role models that inspire and enable their journey."
The Giants have about 140 members, while the trust also runs local school programmes for more than 200 children per year.
They are looking to expand services for 2021 to meet surging boxing interest from around Hawke's Bay.