Who? On-call Particpants and their manager(s)
What?
Incident Response Training: https://source.redhat.com/groups/public/service-delivery/service_delivery_wiki/incident_management_process
Post Mortem Training: https://source.redhat.com/groups/public/service-delivery/service_delivery_wiki/incident_management_process#jive_content_id_Post_Mortem_Review

An SRE manager or SEA team member will provide a formal training to the Hybrid SRE team in this process, which can then be practiced with the kubefuffle chaos engineering scenarios and live games.

These Supplemental trainings must also be completed:
https://source.redhat.com/groups/public/sre_training