What is an Intervenor, and what is thier role in a family court case???

The Department of Economic Security/Department of Child Support Enforcement can only intervene in your case to the extent someone has request the state for assistance in establishing or enforcing child support. DES/DCSE will not be involved in any custody/visitation matters.

No they will not have any input in the custody and visitation. The will take over the child support portion of the case and the enforcement of the child support. If you can not afford to pay your support then you might want to get it modified downward. You can got those forms at the self service center or consult and attorney.