Mr Ammunson said he took a lot of inspiration from "those old guys in the Maori Battalion".
"They didn't have university degrees and they weren't rich," he said.
"Them going all the way over to Europe, just sacrificing everything they had including their lives, just so people like me could, nearly 100 years later, go to university ... they're an inspiration for me."
Wairarapa MP Alastair Scott said he was pleased to meet Mr Ammunson at Parliament this week when he was announced as one of the five winners of the scholarship.
"I was told that Herewini has a strong and impressive academic record," Mr Scott said.
"This is an achievement he should be very proud of, I'm sure his whanau are very proud of him. I want to congratulate Herewini on his commitment to not only his studies, but to the organisations he has been volunteering for.
"It's great to see our local young adults stepping up to support their communities.
"These kind of young leaders will inspire others to do the same and will lead by example.
"I can't wait to see what Herewini gets involved in over the next few years and where he goes in his academic and work life."
Mr Ammunson said that when he graduated from university he would like to work for a law firm and "give back to my tribe, my iwi and my Papawai Marae in Greytown".