We don’t have an integration with Nelnet Payment Services, so it won’t work with Event Espresso.
As far as I am aware there isn’t a 3rd Party EE integration with this merchant either.
May I ask why the switch? What did you use prior to Nelnet?
(Side note – Just to clarify we also did not have an integration with PaymentSpring so this isn’t a payment method we haven’t updated to match a rebrand etc.)