A worker at a company bidding for an Adani contract has told the ABC she is leaking inside information to environmental activists so they can target her employer.

Key points: Mining industry insider says she is risking her job by leaking information to help stop Adani's Carmichael coal mine

Mining industry insider says she is risking her job by leaking information to help stop Adani's Carmichael coal mine Activists say insiders are helping them to pressure companies before any deals are done with Adani

Activists say insiders are helping them to pressure companies before any deals are done with Adani The QRC says contractors should beware activist infiltration but not cave to pressure if they want to keep working with mining companies.

Sue*, a long-time mining services industry worker who has asked to remain anonymous, said she was willing to risk her career for "the opportunity to provide information that could help to stop the [Carmichael] mine proceeding".

"I saw it as an opportunity to do something that might help, something proactive, because as somebody with concerns about these sorts of things, you can find yourself feeling powerless," Sue said.

"So when you come across something that you see you can contribute, you jump on board."

Activists said many industry insiders were leaking to help them pressure companies to abandon Adani before even signing up to service what could be Australia's last big thermal coal mine.

The Queensland Resources Council (QRC) said it was part of an unprecedented campaign to destroy jobs by targeting the fringe players in a project that has already won government and local community approval.

Hundreds of anti-Adani protesters marched across Victoria Bridge in Brisbane's CBD on June 21. ( ABC News: Mark Leonardi )

The campaign puts prospective Adani contractors in the crossfire, facing on the one hand potential site protests or boycotts for working with the company, and on the other a backlash from miners for caving to activists.

Activists almost have 'too much information'

Ben Pennings from Galilee Blockade said they now had almost "too much information" from insiders after their "dob in a contractor" campaign.

"They're telling us about which companies are bidding for Adani work, they're telling us about Adani sites, but they're also telling us really sensitive stuff which, for want of a better word, is 'where the bodies are buried'," he said.

"We're getting information about industrial sites, how companies can be affected, what their favourite sponsorships are, about their venues, what their brands are that they care about, where they're most easily convinced.

"Any company siding with Adani is taking massive risks with regards to their brand and reputation and maybe even their profits."

'Activists will stop at nothing to destroy jobs'

QRC chief Ian Macfarlane said the industry had seen "nothing as concentrated and as organised" as the current campaign against would-be Adani contractors.

"The activists will stop at nothing to destroy jobs," Mr Macfarlane said.

"My advice to companies is to show some courage and to be aware that the activists are trying to infiltrate your organisations and make sure that your own IP [intellectual property] and the security systems you run are up to scratch."

Mr Macfarlane said the QRC would never blacklist mining services providers that caved to activist pressure, but miners would take it into account in the future.

"It is going to damage their reputations long term, if they bow down to these activists and don't stand by the industry," he said.

Adani workers at a water bore at the Queensland mine site. ( www.adaniaustralia.com )

'An ethical, moral thing to do'

Sue — whose identity and employment have been confirmed by the ABC — said she was not anti-mining but "just concerned about mining of certain resources and thermal coal is obviously a big problem".

She said if outed as a leaker "I would lose my job, I probably would lose my reputation. and it'd probably be a problem for me going forward in getting employment".

"It's certainly not something that you take lightly, [but] it's a black and white decision," she said.

"You can look after your own interests at a particular point in time, or you can look further down the track, which is something that people with children, or people who are aware of the [environmental] impacts of these sorts of things, will do."

Sue said she was a regional Queenslander and "not exceptional in any way".

"There would have to be many, many people like me who will share information to try and prevent this mine going ahead," Sue said.

"I don't think they'll be able to stop that, because people who have information that will assist will always do that — it's an ethical, moral thing to do."

Key details of deal leaked weeks before

This week it was revealed BMD had become Adani's largest contractor to date, with a deal to build a railway line from the mine.

Galilee Blockade claimed that sources weeks earlier leaked key details about the deal, which the group said was a 12-month project to build a 75-kilometre rail line with a workforce of about 100, starting in late 2019.

They said they had details from construction to rosters and freight routes.

In a leaked email to staff, BMD executive director of operations Scott Power said the Adani deal was "very good news [but] our association with this project does put us at risk of being the target of anti-Adani protesters".

"We ask you to be mindful of talking about this project with your friends and on social media," he said.

Mr Power suggested staff talk about BMD's role in renewable energy when protesters "raise the topic of climate change and the project's impact on the environment".

BMD did not respond to the ABC.

Adani's Carmichael coal mine site in Queensland's Galilee Basin in December last year. ( Twitter: Matthew Canavan )

'Activists do not speak for everybody'

An Adani spokeswoman said the company routinely avoided discussing "who our contractors and business partners are in order to protect these businesses from becoming the targets of activists".

"We think it is only reasonable that Australian companies and their employees are afforded the opportunity to go about their legal business, without their livelihoods being threatened by activists," she said.

"We are all for people having their say, providing people do it in a respectful and legal manner.

"However these activists do not speak for everybody in the community, and it is un-Australian to have a minority group put businesses and their employees at risk when they deserve a fair go."

Mr Pennings said the number of people giving activists information had been "refreshing".

"We know all sorts of information, because people who work for those companies have been brave enough and concerned citizens," he said.

"We know who is bidding for the PE pipeline for Adani's mine, who wants to dig the pipeline, and put it towards the dewatering dam, who's going to be doing the box cut for the mine.

Protesters rallied against the Adani mine approval in Brisbane's City Square on July 5. ( ABC News: Anna Hartley )

"We're going to let those companies know that we've got the information and we expect them to get out of bed with Adani," Mr Pennings said.

"We believe that Adani will never have social licence, and it's going to be really difficult for them to ever get this mine operational."

'Adani is already assisting communities'

Mr Macfarlane said it was "nonsense" to suggest the Carmichael mine lacked community support.

"Of course Adani does have a social licence to build a mine, and they do have all the regulatory licences as well," Mr Macfarlane said.

"They have been put in place through long and at times very detailed consultation, whether it's been with local Indigenous groups, local community groups, local farming groups, local councils, and of course with the state and federal governments.

"Adani is already assisting communities, providing jobs [and] infrastructure for communities."

*Name changed