Scott Bannan has promised to work 24 hours a day for his community when he takes his seat in the Logan City chambers.
Cr Bannan was declared as the winner of the seat late on Friday night.
He had 4636 votes to Helen Cowley's 3143, according to scrutineers.
The Jimboomba super cross organiser and three-time world muay Thai champion said he looked forward to helping shape the future of the area.
"I'm ecstatic," he said.
"To get this job for the area you come from is unbelievably cool.
"It's something I have tried to do anyway."
Cr Bannan said he looked forward to working with new mayor Darren Power and councillors who he said would do a god job for the city.
"He'll be fine," he said of Cr Power.
"He has got a lot of experience. And that military background means he will have that leadership.
"But a captain is nothing without a good side. He has got a sensational team.
"We will make him look good, and he will make us look good."
The main issue to tackle will be Logan's recovery from the economic impacts of the deadly coronavirus.
"No one has ever seen what we are going through," he said.
"No one knows when it is going to stop."
He said the win made up for the disappointment of losing the state election to Linus Power, when Cr Bannan stood for the One Nation Party.
"I have built a relationship with Linus," he said.
"The work he is doing behind the scenes has been sensational."
He thanked his opponents for their campaigns.
"It was good, there wasn't any malice in any of their campaigns," he said.
"The whole way, everyone ran a clean campaign."
He also thanked the Division 9 community for its faith in him at the polls, and said he would prove they picked the right person.
"I will work 24-7 for them," Cr Bannan said.
"They have seen what I can do with super cross and pink stumps (fund raising) day when I am organising things part time.
"Now I'm working for the community full time. I can't wait to get started."