As described in the ONNX governance, Special Interest Groups (SIGs) are persistent groups responsible for specific parts of the project. SIGs have open and transparent proceedings to develop goals and implement code contributions. SIGs are also responsible for ongoing maintenance of the code in their areas.
If you are interested in participating, please join the discussion in the respective Slack channels. Details about any upcoming meetings will also be shared in the Slack channels. SIG artifacts can be found in the sigs repository.
You can find the schedule of SIG meetings on the LF AI calendar
The list of current sig is found here.