Co-leader Metiria Turei, of Dunedin, announced Julie Anne Genter would take over the finance role from former co-leader Russel Norman, who remains third-ranked and has trade as his main role.
Ms Genter, while only the third female finance spokeswoman to be appointed by any political party behind Ruth Richardson and (briefly) Rahui Katene from the Maori Party, is ranked ninth on the Green list of MPs in Parliament.
The Greens have struggled in past years to make an impact on the finance scene and Dr Norman was written off as a potential finance minister by Labour before the last election.
Mrs Turei has taken inequality, along with building and housing (including social housing) and Maori affairs.
New co-leader James Shaw takes climate change and economic development.
Kevin Hague, one of the unsuccessful co-leader candidates, takes health, conservation and rainbow issues, Eugenie Sage has environment, primary industries and the Canterbury earthquake recovery as her main issues.
Another unsuccessful co-leadership candidate, Gareth Hughes, retains energy and resources, along with tertiary education, skills and employment, science and innovation, pitting him against uber minister Steven Joyce.
Catherine Delahunty has education, water and human rights and Kennedy Graham has foreign affairs, veterans affairs and senior citizens.
Ms Genter also has transport and youth roles.
Mrs Turei said the party had decided to consolidate what had previously been several portfolios into the single primary industries portfolio held by Ms Sage.