Several hundred protesters gathered outside the annual general meeting of offshore detention operator Transfield are calling on the company not to renew its contract with the Australian Government on ethical grounds.

Shareholders for Transfield, which operate Australia's offshore detention centres on Nauru and Manus Island, have gathered for the company's annual general meeting at The Mint building in Sydney's CBD.

As directors began their opening comments, two separate protesters, attending as proxies, disrupted the start of the meeting.

A woman was asked to leave by a speaker three times before being escorted from the room by security guards.

A second woman was removed after refusing repeated requests to sit down.

As the meeting commenced the AGM heard that Transfield directors had visited Nauru.

"We have seen first-hand the high quality services that your company is delivering," said Diane Smith-Gander, chairman of Transfield Services.

"It is clear that the care and wellbeing of asylum seekers is paramount. It is challenging work.

"We accept our services are delivered in a politically charged environment."

Ms Smith-Gander said the company played no part in political decision-making regarding immigration processing centres.

Protesters called on Transfield not to renew its contract with the Australian Government. ( ABC News: Ursula Malone )

"We have no responsibility for these policies and play no role in their development," she said.

Transfield Services chief executive Graeme Hunt announced that the company's contract to run the Federal Government's immigration processing centres had been extended for four months until March 2016.

Mr Hunt said Transfield would then be well-placed to sign a new five-year contract, defending the decision by saying the company would "continue to work at ways that the asylum seekers can integrate into the wider Nauruan community."

Report targets policy 'over which Transfield has no influence'

The demonstrations followed a report that alleged Transfield Services had been complicit in human rights violations.

The No Business in Abuse (NBIA) report, released by campaigners including the activist group Getup, alleged Transfield Services had been complicit in violating 47 human rights laws through its operation of the centres.

The report said 2,000 asylum seekers had been victims of human rights abuses - including sexual assault, child abuse and what it called "unlawful detention" - while Transfield made millions of dollars.

"A company doesn't need to be the sole cause of an abuse to hold responsibility for it," the report said.

"It can aid and abet that abuse, knowingly providing practical assistance or encouragement that has a substantial effect on the commission of the abuse."

NBIA's Shen Narayanasamy added: "This company has been paid $1.4 million of taxpayer money a day for the last three years to run these centres and we're here to tell them today that the financial, reputational and legal damage of their association with abuse needs to stop," she said.

In a statement, Transfield said the report targeted government policy "over which Transfield Services has no influence".

"It singles out Transfield Services, despite many entities, including NGOs, being involved in the delivery of these services," the statement said.

Transfield said it had zero tolerance for abuse and was working "to improve the lives of asylum seekers" under a strict code of conduct.

It also said the document contained factual errors and misrepresented statistics.

But the United Voice union called on Transfield investors to consider the report.

United Voice national secretary Jo-anne Schofield said current and former employees had told the union that change was urgently needed.

"We're seeing a lot of pressure due to poor management of the centres being squeezed down on to staff who are really trying to do their job in a very volatile environment," she said.

Former detainee shares experience with shareholders

Afghan refugee Mohammad Ali Baqiri, who spent several years in immigration detention on Christmas Island and in Nauru, attended the meeting on a proxy ticket.

Afghan refugee Mohammad Ali Baqiri argued it was morally and ethically wrong for any company to profit from abuse. ( ABC TV )

He addressed shareholders, arguing that it was morally and ethically wrong for any company to profit from abuse and then spend those profits in Australia.

Ms Smith-Gander responded: "We are providing essential services within a lawful contract and the most unethical thing we could do is walk away from the contract."

Earlier this month, more than 12,00 people including Australian of the Year Rosie Batty signed an open letter calling on Prime Minister Malcolm Turnbull to close down the centres.

The open letter was sparked by the alleged rape of a 23-year-old Iranian woman on Nauru.