Counselors in all settings work with clients who are survivors of trauma. Vicarious trauma, or counselors developing trauma reactions secondary to exposure to clients' traumatic experiences, is not uncommon. The purpose of this article is to describe vicarious trauma and summarize the recent research literature related to this construct. The Constructivist Self-Development Theory (CSDT) is applied to vicarious trauma, and the implications CSDT has for counselors in preventing and managing vicarious trauma are explored.