Disability service providers say free university courses and better wages are needed alongside a national advertising blitz to double the size of the sector's workforce as part of the Morrison government's overhaul of the National Disability Insurance Scheme.

National Disability Services chief executive David Moody said state and federal governments must do more to "actively promote" working in the sector, including targeting high school students, stay-at-home parents and workers displaced by declining industries.

Disability service providers say more is needed to boost the industry's workforce. Credit:Izabela Habur

Danielle Ballantine, chief executive of Your Side disability services, said the need to train and recruit disability support workers would become more urgent as the government moved to fix the trouble-plagued NDIS system in response to an independent review released on Monday.

NDIS Minister Stuart Robert on Monday reaffirmed the government's commitment to a participant service guarantee setting rules and timelines for NDIS assessments by July 1, while releasing the review of the scheme by former finance department secretary David Tune.