Disability services provider Yooralla says it has taken steps to better protect the people in its care, after sickening rapes and abuse in its homes.
Yooralla's CEO Sherene Devanesen will appear before the disability royal commission in Melbourne on Thursday.
Senior counsel assisting the commission Kate Eastman SC said the crimes had created deep scars for a number of people with disability and their families in Victoria.
"All of these incidents of violence and abuse of people in Yooralla's care are confronting and as the judges described, sickening," she said in opening this week's hearing into group homes.
Yooralla has told the royal commission it deeply regrets the abuse of people in its care.
It was one of the first service providers to provide a submission to the royal commission, outlining the steps it has taken to address its failings and implement systems to better protect people in its care.
Ms Eastman said the royal commission wants to know whether the measures introduced by Yooralla have improved the safety and security of people in its care.
Dr Devanesen's evidence would also be an opportunity for the inquiry to hear how Yooralla had supported the survivors of the shocking violence and abuse.
Ms Eastman said while the focus was on Yooralla, the royal commission was confident the issues faced by that provider are not isolated and the lessons were relevant to service providers across Australia.
The exposure of the Yooralla incidents seven years ago sparked Senate and Victorian parliamentary inquiries, which both found the abuse of people with disability was widespread.