The announcement from National MP Nathan Guy that he will retire from politics at the next election has sparked a reshuffle of portfolios within the party.
The Otaki MP won't be seeking re-election in 2020 after 15 years as an MP.
Guy entered Parliament in 2005 and became a minister in 2009 when Sir John Key's National Government came to power. He's served in a number of ministerial roles, such as Minister of Primary Industries and Minister of Immigration.
"I have been extremely fortunate during my time in Parliament and am proud of the work I have done in my Otaki electorate as well as for New Zealand as a whole," he said in a statement on Tuesday.
Leader of the Opposition Simon Bridges said Guy had been a valued colleague and friend.
"I wish him all the best for his future career and would like to thank him for the service he has given New Zealand over 15 years," he said.
He said Guy had been a champion for rural New Zealand.
"As a farmer and a businessman, he understood more than most what the sector needed and he delivered for them," said Bridges.
Nathan Guy's portfolios of Agriculture, Biosecurity and Food Safety would be picked up by Todd Muller.
Bridges said he would also keep his Forestry portfolio. "Todd is a hardworking and high performing MP who is deserving of a promotion. "
"I have no doubt that Todd will hold this Government to account on behalf of rural New Zealand."
The Climate Change portfolio would be picked up by Scott Simpson, who is also Environment spokesperson.
The Workplace Relations and Safety portfolio would go to Todd McClay.