Green Party leader James Shaw says his party can work with Peters but they are unlikely to support a Labour-NZ First government from the sidelines.

The Green Party's coalition negotiation team includes leader James Shaw and four other senior party staff and MPs.

Shaw has announced party "musterer" and MP Eugenie Sage, acting chief of staff Tory Whanau, party co-convenor Debs Martin, and party campaign committee member Andrew Campbell, will join him in coalition talks with other parties.

"Our team has the experience and expertise to represent the interests of the Green Party, its members and its supporters in the negotiations to come," he said.

JOHN HAWKINS/STUFF Green MP and party "musterer" Eugenie Sage will also be on the team.

"While formal negotiations have yet to start, I think it's important to be transparent about who's being entrusted to lead our team when they do."

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The core negotiation team will be supported by a larger reference group with broad expertise, including former co-leader Jeanette Fitzsimons and other senior figures in the party.

TESS BRUNTON/STUFF Former co-leader Jeanette Fitzsimons will be part of the wider reference group.

The reference group will be consulted on specific issues and bottom lines that form part of the negotiations.

After negotiation talks, the Green Party would have to get the support of 75 per cent of its members at a special meeting to officially form a coalition.

"I want to assure Green Party members and the public that we go into these negotiations in good faith and with the best interests of all New Zealanders at heart," Shaw said.

"Forming a stable, progressive government and advancing the Green Party's priorities of real climate action, cleaning up our rivers and ending poverty are all top of mind.

"We also know that New Zealanders want these negotiations to be undertaken professionally and promptly; the Green Party will honour that."

Labour and the National Party are also in the process of finalising their negotiating teams. While there has been speculation, none of the other parties have confirmed who will be sitting at the table, at this stage.

It was expected caretaker Foreign Affairs Minister Gerry Brownlee would play a lead role in any negotiations on National's side.

In the Labour Party camp there's a suggestion former deputy prime minister Sir Michael Cullen could be brought in to negotiate with Peters and possibly former Health Minister Annette King.

Labour leader Jacinda Ardern has said she expected initial talks would be one-on-one with the Greens and NZ First rather than three-party negotiations.

Shaw has said he would work with Labour and NZ First, and he would be obligated to listen if National called, but Bill English would have to come knocking with a good offer for the Greens to consider a coalition with National.

Shaw and Ardern had talked on the phone on Sunday but had still not spoken face-to-face on Monday.

The Greens have ruled out being a support partner of a Labour-NZ First coalition. Shaw said they would want to be part of a full partnership.

It is unclear exactly how long negotiation talks would take, or when a new government would be formed.

Neither English or Jacinda Ardern have spoken directly with Peters yet, who made it clear he first wanted to meet with his caucus and board before any negotiations got underway.

Both Peters and Ardern had indicated that they would like to wait until the "special vote" - about 15 per cent of the total - was counted on October 7.