This TIO training provides foundational knowledge appropriate for individuals across sectors and job titles. After defining key terms, including stress, trauma and systemic oppression, we explore how trauma and adversity affect individual’s access to services. Participants begin to identify how service systems, often unknowingly, retraumatize survivors of complex trauma. We highlight the difference between trauma specific services and trauma- informed care, and practice reframing behaviors from a trauma- informed lens. Participants then identify ways to modify programs and policies to be more trauma informed, by learning about the principles of trauma-informed practice. Finally, we delve into the impact of adversity and stress on the workforce and the organization, and highlight the importance of workforce wellness and self-care.