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Fewer than 6% of the university's academics are Maori, while at the last census Maori made up about 15% of New Zealand's population.
Prof Jacinta Ruru, who in 2016 became the first Maori law professor in New Zealand, said the situation was ``a crisis'', and she wanted to see the university set ``rigid'' targets in its quest for population parity.
University leaders needed to ``realise that there is a real issue here''.
``I am the only Maori academic in the faculty of law, and have been for 20 years,'' Prof Ruru said.
Her comments follow a story on RNZ earlier this month where Maori academics at different universities reported feeling unsupported where they worked.
The site reported that at Victoria University of Wellington 4.6% of academics identified as Maori, while at Massey University 5.4% of academics identified as Maori, compared to 5.8% at Otago.
Prof Ruru, who teaches papers in Maori land law and law and indigenous peoples, said she would like to see Otago implementing more proactive measures, such as setting specific yearly targets.
Maori academics who were isolated in their own departments ended up going ``over and above'', bearing the brunt of supporting Maori students and liaising with the Maori community.
Her faculty had been supportive and her job was rewarding, but in the early days it was the Maori students she taught that inspired her to carry on.
It should have been the other way around, she said.
Prof Ruru said she predicted people would say that the lack of Maori lecturers was due to a lack of Maori students taking postgraduate qualifications.
However, that was ``not the situation'', she said.
Nationwide there were more than 800 Maori with PhDs.
``Many have wanted to be academics,'' she said.
She knew of graduates whose work had been published but who had not been interviewed for jobs.
Sometimes Maori academics also felt more of a sense of community with others in the same position, rather than with their own department, which created problems of its own - with people trained in other disciplines gravitating to Maori studies instead.
A university spokesman said the university had already made boosting Maori staff numbers to reflect the population a focus in its Maori Strategic Framework 2022, which includes other goals such as Maori student success and promoting the uptake of te reo.
Low Maori academic staff numbers were a national problem, the spokesman said.
Two aims set out in the framework were ``growing our own'' Maori staff, by supporting Maori students, and targeted recruitment of new staff.
Prof Ruru said she definitely ``welcomed'' the aspirations set out in the framework, but was looking forward to clear action plans.
``Who is the university working with to generate ideas to increase Maori in academia?'' she said.
The university did not provide a response to her suggestion there was a bias towards employing academics who had studied overseas.