APSC’s Digital Profession now has an Accessibility and Inclusion Community, join the discussions and share accessibility news and ideas (needs a .gov.au email address).
OZeWAI’s forums.ozewai.org is a place to post jobs, ask questions of the accessibility professional community and find out about events and accessibility news.
For a more global community, there is the web-a11y.slack.com group where people share examples and ideas on accessibility issues, including technical assistance.