Disability service providers are organisations experienced in supporting people with disability. These organisations also help employers to implement extra practices to support the employee in the workplace, if required.  
There are many disability providers in NSW who specialise in employment and can assist people with disability to prepare for and find roles in NSW Government. They can also provide support to people after the placement once they secure roles, including training for staff to contribute to creating a safe and inclusive environment for staff with disability.  
Disability Employment Australia provides a list of all services providers available in NSW, which you can search for by location.