Nearly a quarter of staff at the regulator of the $46 billion National Disability Insurance Scheme (NDIS) are burnt out and one third are reporting a lack of career paths for colleagues with disability.

It comes months after a damning workplace review exposed high rates of bullying and harassment.

The NDIS Quality and Safeguards Commission received dismal public service employee census results for a third year in a row , according to unpublished survey data obtained by The Canberra Times.

The findings come after a review handed down by the former sex discrimination commissioner found evidence of a dysfunctional workplace culture at the agency which culminated in a shake-up of senior leadership last year.

But results from this year's APS census, finalised roughly at the same time

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