Former Australian prime minister Kevin Rudd was considered by the United Nations for a top-level job as an adviser on climate change, local media reported on Thursday.

Rudd spent several days in New York last week meeting with UN officials.

UN Secretary-General Ban Ki-moon is now considering creating a dedicated role for him as a top-level adviser on climate change, according to a diplomatic source with knowledge of the plan.

According to the Courier-Mail, the UN appointment's term and start date have not been fixed, most likely to give Rudd the flexibility to begin any time he likes.

A UN spokesperson in New York Wednesday night refused to comment on speculation about Rudd's future with the organization.

"We don't comment on appointments until they're announced," the spokesperson said, referring to Rudd's recent meeting with Ban as a "courtesy call".

Despite the former prime minister's domestic failure on introducing a greenhouse gas emissions trading scheme (ETS) in Australia, Rudd is popular among UN delegates for reversing Australia's position on the signing of the Kyoto Protocol.

He could have been a contender to replace Dutch climate change advocate Yvo de Boer, who resigned as chief of the UN Framework Convention on Climate Change secretariat in February following the Copenhagen talks, a diplomatic source told the Courier-Mail.

De Boer's replacement, Christiana Figueres, was named in May and started in the role on July 8, a fortnight after Rudd was ousted as prime minister by his ruling Labor Party.

Although Rudd failed to introduce ETS, he received a standing ovation from UN delegates for ratifying the Kyoto Protocol and played a key role behind the scenes in the Copenhagen negotiations.

His close relationship with U.S. President Barack Obama and his Chinese language skills would be a bonus because action by the U.S. and China are critical to the UN's efforts on climate change, the newspaper said.

Australian Prime Minister Julia Gillard said Rudd would be an honored guest at her campaign launch. She also reaffirmed that she would offer Rudd a front-bench position if Labor is re-elected.

Rudd's office has refused to comment on the possible UN move.