Intervener Role of an IntervenerLearn about the services provided by an intervener. Intervener TrainingOnline training program offered by Utah State University. National CredentialInformation about becoming nationally credentialed. Determine the NeedHelping schools determine the need for an intervener. WDBTAP Supports IntervenersLearn about the support WDBTAP provides. Intervener FAQFrequently asked questions about intreveners.