Hi! It's pretty far away from what I work on, so I don't have personal recommendations, but I think it's this team - op.europa.eu/en/web/who-i.... Don't hesitate to get in touch with them directly and best of luck with event (I'll try to come by, too :-)
op.europa.eu
null - EU Whoiswho - Publications Office of the EU
Organisational charts of the EU institutions, bodies and agencies