Economist and winemaker Peter Whish-Wilson has been selected by the Greens to replace former leader Bob Brown in the Senate.

Mr Whish-Wilson, 44, is the co-owner of a vineyard in the Tamar Valley and a finance lecturer at the University of Tasmania.

He has been a vocal opponent of the proposed Gunns pulp mill in the state's north.

Who is Peter Whish-Wilson? Ran for the Senate with the Greens in the 2010 election

Ran for the Senate with the Greens in the 2010 election Has taught economics and finance at the University of Tasmania since 2005

Has taught economics and finance at the University of Tasmania since 2005 Director of the Three Wishes Vineyard in the Tamar Valley

Director of the Three Wishes Vineyard in the Tamar Valley Masters of economics from the University of Western Australia

Masters of economics from the University of Western Australia On the board of conservation group Surfrider Foundation Australia

On the board of conservation group Surfrider Foundation Australia Formerly worked at Deutsche Bank Securities and Merrill Lynch

Mr Whish-Wilson says he is humbled by the appointment.

"I'm also very conscious of the responsibility that will go with this position, both to Greens voters and all Tasmanians, in fact all Australians," he said.

"I would just like to say that I think it is a very significant move for the Greens to put a senator in the north of Tasmania, to put an office there.

"It's also a very strong message that the Greens will continue to oppose the pulp mill in the Tamar Valley."

Greens leader Christine Milne says Mr Whish-Wilson will bolster the party's economic credentials.

"This is a tremendous opportunity for us to build our Green team nationally, to represent our state so well, and to actually take the Greens so strongly into that economic space where we have excellent policies and where we're working to present an internally consistent, cohesive and visionary economic narrative for the nation," she said.

Senator Brown says he is delighted with his replacement.

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Listen Duration: 5 minutes 38 seconds 5 m Peter Whish-Wilson has been chosen to replace Bob Brown in the Senate. Download 2.6 MB

"He has a multiple gold medal-winning vineyard in the north and he will be a gold medal senator for Tasmania," he said.

"It's just a wealth of talent being brought into the Green team and into the party room in Canberra."

Mr Whish-Wilson, who has formally worked in the finance sector with Deutsche Bank Securities and Merrill Lynch, dismissed questions that he was a "light green".

"Light green, dark green, all good, all green - it's just a label. Labels are cheap," he said.

"I will certainly try and get messages out there that are going to be very positive."

Senator Brown says he will work with Mr Whish-Wilson over the coming weeks as he prepares to stand down from the Senate.

The Greens founder says Mr Whish-Wilson prevailed in a field of ten candidates.

"There was a good field of candidates. It showed great strength and depth of the talent in the Tasmanian Greens and holds us in good stead for the future," he said.

The Senator-elect disclosed at the end of the media conference in Hobart that, as well as stepping into Bob Brown's shoes, he was also wearing his shirt.

"I'm actually wearing Bob's shirt today because I spilt coffee on my collar on the way...and it fits perfectly."