The senior public servant who oversaw the unlawful Robodebt scheme has quit her new role, the Department of Defence has confirmed.

Kathryn Campbell, who was previously the secretary of human services and later the foreign affairs department, resigned from her advisory role at Defence, the department said in a statement late on Monday afternoon.

Ms Campbell’s resignation was effective from last Friday.

Defence said it would provide no further comments.

Ms Campbell had been suspended from her Defence role since July 10, three days after the royal commission report was tabled.

Ms Campbell was made an adviser on the AUKUS security partnership in June 2022, with a salary of $900,000 a year.

Greens senator Barbara Pocock said last week that proper process did not appear to have been followed when Ms Campbell was transferred from Foreign Affairs to Defence.

“She was given a golden parachute across into a job paid over $900,000 and it looks like it was all built backwards,” Senator Pocock told Sky News.

“Here’s a problem person, we have to get them out of the way, how do we create a job and how do we preserve their salary?

“It’s not the way things should work in the public sector, it’s not proper management of taxpayer dollars and I think Australians expect better.”

Ms Campbell was singled out in the royal commission report into Robodebt.

The commission found the former secretary gave misleading evidence to cabinet about Robodebt but stayed silent because then-minister Scott Morrison wanted to pursue it and the government wouldn’t be able to achieve budget savings without it.

While the commission said she was “likely to mislead because it contained no reference to income averaging or the need for legislative change”, Ms Campbell said it was an “oversight”.

However, the commission said such claims were extraordinary for someone of her experience.

Prime Minister Anthony Albanese confirmed the decision to suspend Ms Campbell was made by the Department of Prime Minister and Cabinet and “appropriate bodies”.

Mr Albanese said the royal commission identified failings within the public service and there was a need to respond.

“Most people who have a look at the human tragedy that was caused by robodebt and the findings of the royal commission are very, very clear about failings by the Morrison government and indeed going back to when Scott Morrison was the minister,” he told ABC Radio on Thursday.

Mr Albanese did not say if the suspension would be permanent.

He said the government would respond in an appropriate way to the findings of the royal commission, which were “more damning than anyone was expecting”.

-with AAP