To Join the ISG, as with all ISGs, is open to all. Interest expected from the ICT industry, IT operators, Suppliers, research organisations
Having read the Terms of Reference click here
If you are an ETSI member: ask you lead ETSI delegate to e-Sign (electronically sign) this document: here
If you are not yet an ETSI member: a manager with budget responsibility may e-Sign (electronically sign) this document: here
Then, ensure you have a ETSI account (EoL) by clicking here with a profession email address. (not a private email address)
and then join the ISG mailing list by clicking here
You have then joined.
You may mail to send a request to ETSI helpdesk or ETSI ISG support