leving helped pioneer the fathers' rights movement when he discovered a gap in the judicial system. he started seeking equality and due process for fathers everywhere. in 1979, leving became a staff attorney for the chicago volunteer legal services foundation, and in 1981 joined a firm that allowed him to use their offices to start his own practice during his spare hours, "focusing on family law, divorce, paternity, and child custody". leving's accomplishments include the co-authorship of the illinois joint custody law, illinois virtual visitation, right to dna testing notice, and unlawful visitation or parenting time interference laws. he also delivered testimony before both branches of the illinois legislature on joint custody, grandparent's visitation and child support accountability bills.