Jack Davenport is a consultant for child safety services in the Department of Communities and says he wants to be a voice in the Upper House on climate change and social justice.

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"I've always been involved in serving the public and in politics and environmental issues are so important," Mr Davenport said.

"We have to speak up on the climate emergency because it's happening and it will have an impact.

"We're seeing in New South Wales and Queensland how people's everyday lives are being affected by the smoke."

He also believes the Launceston Gorge needs to be protected from further development that could undermine its cultural heritage.

Mr Davenport, a councillor for six years on the Preston City Council in the United Kingdom, moved to Launceston two years ago and bought a home at Gravelly Beach. Greens leader Cassy O'Connor said she was delighted Mr Davenport was standing and believed he would be a "worthy successor" to Kerry Finch who has held the seat for 18 years.

"Kerry Finch is leaving a massive pair of comfortable shoes to fill," Ms O'Connor said "He's such a great person and has done his community proud."

Ms O'Connor said Mr Davenport' had a deep understanding of social issues including family violence, housing stress and the child safety system.

"His experience as a child safety officer and work within the system means he understands the central importance of making sure Tasmanians who are struggling aren't forgotten by government," she said.

"He also understands the urgent need for climate action from all levels of government and Jack's commitment to a fairer and climate-ready future means he's the right person for Rosevears."