The Northern Territory's opposition leader says she — along with other MLAs — will boycott Friday's swearing-in of the incoming Territory Administrator over past social media posts, which contained derogatory remarks about First Nations people.

Former Northern Territory Cattlemen's Association president David Connolly is set to be sworn in as the Territory's 24th Administrator after being nominated in December by Chief Minister Lia Finocchiaro. The role — equivalent to a state governor — is intended to be politically neutral and carries a salary of $377,000.

However, Mr Connolly's social media history, which includes comments Indigenous leaders have described as racist — such as attacking Welcome to Country ceremonies and mocking Indigenous languages — prompted the Northern Land Council and Aboriginal Peak Organisations NT (APONT) to call on the government to withdraw his appointment.

Earlier this month, opposition and crossbench members staged a walkout of parliamentary Question Time in protest at his selection.

This week, Labor leader Selena Uibo — the only opposition member invited to Friday's ceremony — said she would not attend Friday's event.

"The CLP should not be pushing ahead with the swearing-in of David Connolly as NT Administrator when so many Territorians have raised concerns about his offensive public comments," she said in a post on social media.

"Territory Labor will not be attending. We're standing with the community on this. These serious community concerns should not be ignored."

Independent MLA Yingiya Guyula, who has frequently criticised the government's treatment of Aboriginal people, told the ABC he was not invited to the ceremony, despite previously being invited to the swearing-in of former administrator Hugh Heggie.

"In the past I have been invited to these events and the lack of invite this time suggests that this is a political appointment, and [the NT government] knows that I am not supporting their choice of candidate," he said.

Mr Guyula said Mr Connolly is someone who "has proven that he does not support Aboriginal people".

"He has clearly shown through his past comments that he will not be an administrator that will stand for everyone."

Mr Connolly has not apologised for the posts, saying instead he did not intend to cause harm and would be a "fierce advocate for all Territorians".

"My former social media posts are exactly that and were done at a time when having the honour and privilege of being the Administrator was not even in my wildest dreams," he said in a statement earlier this month.

"I love this place and look forward to getting out and working for everyone right across the Territory."

Speaking to ABC Radio last month, NLC chair Matthew Ryan said he was "disgusted and very disappointed" by the appointment.

"We need someone that doesn't have any baggage," Mr Ryan said. "We need someone that will represent the Northern Territory — not just one-sided, but all Territory Indigenous [people] also."

APONT chair Theresa Roe also criticised the decision, arguing Mr Connolly's social media activity — including claims that Aboriginal people receive preferential medical treatment and are responsible for crime spikes — reinforced harmful narratives.

"This office carries significant standing and public trust in the position is a basic requirement," Ms Roe said. "Such views have no place in the office of the NT Administrator. This behaviour only creates division in the Territory."

Prime Minister Anthony Albanese has ruled out intervening to block the appointment, saying responsibility rests with the Territory government.

"The federal cabinet is just a process of agreeing to the recommendation of the Northern Territory Government; there is no precedent whatsoever for the Commonwealth intervening in such a way," he said last month.