OPA is represented on the following external committees and advisory groups:
- Australian Council on Guardianship and Administration
- Balit Narrum
- COVID-19 Disability Taskforce
- DHHS Disability Stakeholder Advisory Group Supporting Justice Advisory Committee
- Disability Act Review Advisory Group
- Eastern Community Legal Centre, Elder Abuse Strategic Advisory Group
- Elder Abuse and Safeguarding Advisory Group
- Elder Abuse Roundtable
- Ethnic Communities Council of Victoria Elder Abuse Advisory Group
- Justice Connect Safeguarding Now, Preventing Future Abuse Project Steering Committee
- Justice For All Steering Committee
- Law Institute of Victoria, Disability, Elder and Health Law Section Executive Committee
- Law Institute of Victoria, Elder Law Committee
- Our Watch
- Project Steering Committee for the Integrated Model of Care for Responding to Suspected Elder Abuse
- Review of The Retirement Villages Act Stakeholder Reference Group
- Royal Children's Hospital, Community Advisory Committee
- Seniors Rights Victoria, Advisory Committee
- Supreme Court Funds in Court Human Rights Advisory Committee
- Victoria Police, Disability Portfolio Reference Group
- Victoria Police, Mental Health Portfolio Reference Group
- Victoria Police, Disability Portfolio Reference Group
- Victoria Police, Seniors Portfolio Reference Group
- Victorian Electoral Access Advisory Group
- Victorian Electoral Commission, Disability Action Plan Advisory Committee
- Victorian Public Service, Diversity and Inclusion Community of Practice
- VPS Enablers Network
- Women with Disabilities Victoria, Prevention of Violence against Women with Disabilities Advisory Group
- Women with Disabilities Victoria, Spotlight on Invisible Women Project Advisory Group