Interest in transformative mediation is growing, yet there are few tools with which to assess mediators' use of the transformative model. This study presents a novel way of examining transformative mediation in practice. It triangulates data from training and screening processes and surveys of both mediators and participants to determine whether mediators in the U.S. Postal Service REDRESS program were correctly using transformative mediation. The results indicate that during the period of the study REDRESS mediators were in fact engaged in transformative practice. Such triangulation of data may be a useful approach to assessing transformative practice in other organizations.