Environmental activists decked out in their 'spookiest' Halloween attire descended on Crown St Mall on Thursday morning to protest GHD's involvement with the Adani coal mine.
Australian engineering firm GHD, which was contracted earlier this year to work with Adani, has offices all over the country, including one in the heart of Wollongong.
Protestors, led by Wollongong members of the Australian Youth Climate Coalition, urged GHD to cut dies with Adani.
AYCC member Isabella Todd said activists wanted to bring awareness to the "devastating impacts" of the proposed mine in Queensland.
She said the proposed mega coal mine would be the largest of its kind in the Southern Hemisphere, threatening public health, water supplies, endangered species, the Great Barrier Reef and contributing to the climate crisis.
"We're in the middle of a climate crisis because of fossil fuel emissions; the planet can't afford this mega coal mine," Todd said.
"We're calling on GHD to cut ties with Adani. We're here to ask them to build our future, not Adani's mine."
Thursday's action is part of an eight-month long, national campaign by multiple environmental groups to pressure GHD, and other corporate contractors, to cease their involvement with Adani.
We're calling on GHD to cut ties with Adani. We're here to ask them to build our future, not Adani's mine.AYCC member Isabella Todd
AYCC member Dylan Green said in August prominent charity group Engineering Without Borders terminated it's long standing partnership with GHD due to their involvement in Adani's coal mine.
He added though GHD had repeatedly refused to confirm or deny their involvement with Adani.
"We want to encourage more staff to raise their concerns about GHD's involvement with Adani with management, to see that their voice has power in the company," Green said.
"This is about securing a safe future for all of us.
"Right now, Adani's dangerous Carmichael coal mine is closer than ever to construction. But with contractors continuing to pull out of involvement with the controversial mine, it may not yet been able to break ground."
The Mercury contacted GHD's Wollongong office for comment but did not receive a response.