"I look forward to sharing that journey with you and what we can achieve together."
At the meeting, all Horizons regional councillors were officially sworn in for the next three years following a pōwhiri.
Horizons chief executive Michael McCartney said the event was particularly special as it included welcoming two councillors who represent Māori constituencies.
"As Te Tiriti o Waitangi partners, we are excited to have Raki [North] and Tonga [South] Māori councillors join us at the decision-making table," McCartney said.
They joined three new peers and nine returning councillors in signing a Local Government Act declaration which provides them with the ability to act in the councillor role, he said.
Keedwell was up against Bruce Gordon for the role of chair, who received six votes.
Bruce Gordon was the Horizons chair for three terms from 2011 - 2019.
Running for deputy chair were Fiona Gordon and Jono Naylor.
Gordon received five votes and Naylor received nine, making him the deputy chair.
Naylor was also the deputy chair in the previous term.
Whanganui councillor David Cotton voted for Bruce Gordon as chair and Fiona Gordon as deputy chair, and Whanganui councillor Alan Taylor voted for Keedwell for chair and Naylor for deputy chair.