Email your success team (success@jamf.com). You can keep your existing email address (if you want) and add a company email address that is tied to your company assets. That way your Jamf Nation account (and any associated certifications) follow you, even between companies. 

If I want to change my Jamf School account e-mail-address do I need to write to success@jamf.com as well? Or can I change my Jamf School admin account e-mail-address myself?