Neb. Rev. Stat. § 25-309: Neb. Rev. Stat. § 25-309

Except as provided by the Nebraska Probate Code and section 43-104.05 , the defense of an infant must be by a guardian for the suit, who may be appointed by the court in which the action is prosecuted, or by a judge thereof, or by a county judge. The appointment cannot be made until after service of the summons in the action as directed by this code.