Concerns have been raised over the appointment of the Northern Territory's incoming Administrator related to past social media posts referring to Indigenous Australians and ceremonies, among other topics.

Former NT Cattlemen's Association president David Connolly is set to be sworn in next month as the Territory's 24th Administrator, its representative to the Crown in a role equivalent to a state Governor, following his nomination from Chief Minister Lia Finocchiaro.

In recent days, resurfaced past online posts and comments from Mr Connolly have sparked calls for a review of the decision, including from NT Opposition leader Selena Uibo.

Ms Finocchiaro had on Friday defended her nomination, citing the Northern Territory and federal government's approval of the decision, while also stating she had not seen Mr Connolly's previous online activity.

The posts in question include writing "Welcome to my house, that'll be $3000 thanks" in relation to another user's post about Welcome to Country ceremonies.

A different post, made in 2023, appears to show Mr Connolly appears to mock a First Nations interpreter who joined former WA Premier Mark McGowan in press conferences at the height of the coronavirus pandemic.

In another post he wrote: "So the crowds chant always was, always will be Aboriginal land. So here's my Question, will the white fella's in the crowd give the blackfella's in the crowd, their land. You know, "oh here Russell, take my home mate, sure get into it".

"If a white man did it he would be severely fined" and "After experiencing this you cannot convince me they are doing good for the country" Mr Connolly wrote in regards to Indigenous-lit bushfires on cattle stations, per AAP.

Other activity includes Mr Connolly reposting separate photos reading "Did you know the Blue Whale's anus can open 3.5 feet, making it the second largest arsehole in the world, the largest being Anthony Albanese" and "White privilege — the ability to suffer life's universal indignities without blaming another ethnic group".

"Hey troops, off to the beach volleyball today. Don't know why but I am really looking forward to it" he wrote in another post accompanied by an Australian women's team in swimsuits.

Ms Uibo, whose mother was a Nunggubuyu woman from Numbulwar, of the Nundhirribala clan, has called on the Chief Minister to reconsider the appointment.

While saying Mr Connolly was a strong advocate for the cattle industry, Ms Uibo added the NT administrator is role made to "represent all Territorians with integrity, respect and political neutrality", she wrote in a statement.

"Public comments attributed to Mr Connolly have raised serious questions about whether he can meet those standards and carry out the role in a way that unites the community," she continued.

Ms Uibo announced she has written to Governor-General Sam Mostyn expressing concerns and asking for further advice.

"The responsible course of action is clear. This appointment should be put on hold and reviewed," Ms Uibo wrote, also calling into question 'due diligence' undertaken by Ms Finocchiaro, had she not seen the online posts.

"The Northern Territory's greatest strength is our diversity and our inclusiveness, our ability to stand together and support each other. Territorians deserve an Administrator who brings people together."

Centre for Public Integrity director Geoffrey Watson SC has also called for the Chief Minster to "rethink" the appointment.

In a statement from Mr Connolly distributed by the Territory government on his behalf, the incoming Administrator said: "It was never my intention to cause offence; I fully understand and appreciate the expectations of the community and my role as Administrator."

"I have always been a fierce advocate for the bush and will now 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.

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