My sincere desire is that this peer-support pocket guidebook contributes to a broader conversation about trauma, mental well-being, and resilience. Ideally, it will help spark a shift in thinking that de-stigmatizes mental-health challenges such as vicarious trauma, PTSD, and cumulative stress. I hope this resource serves as a catalyst for promoting post-traumatic growth and enhancing resilience among first responders and helping professionals.Providing trauma-responsive and compassion-focused support to our first responder brothers and sisters as well as other helping professionals-after a critical incident is essential. It promotes a long, healthy career and supports a quicker recovery from the impact of trauma and work-related stress. This is the central purpose of this peer-support guidebook.Imagine if a first responder-your friend-were seriously injured in the line of duty and sustained an open wound. Your immediate instinct, grounded in training, would be to act. Your basic life-support education would activate: A: Airway, B: Breathing, C: Circulation.Your goal: stabilize your colleague until a higher level of care is available.The same structured approach is needed for psychological trauma. Evidence-based interventions delivered early can make a significant difference. Consider a parallel model: A. Create Safety and Offer a Ministry of Presence.Establish a calm, empathetic environment where support begins with presence, not pressure.B. Build Connection and Rapport.Provide validation, normalization, and a compassionate space where your colleague feels heard and understood.C. Facilitate Care.Address immediate needs when possible, and when appropriate, assist with a referral to a higher level of care.This guidebook explores each step in depth.It is helpful to remember the roots of the word trauma. The Greek trauma means "wound" or "damage," and the Latin sufferre means "to suffer." These origins remind us that psychological trauma can create deep, invisible wounds that accumulate over time throughout a first responder's career. As peer-support team members, it is essential to understand this reality.When a colleague-or even you-begins to show unusual behavior after a critical incident, it may be an expression of these unseen wounds. Your role as a peer is to notice, support, and help navigate these responses with empathy, attunement, and compassion.This guidebook emphasizes the importance of understanding trauma and its effects. It aligns with the principles of trauma-responsive, compassion-focused peer support.Every first responder deserves the knowledge and tools to understand trauma, manage stress, and prioritize self-care. The lessons in this guide come from lived experience-some learned only after my career ended. My hope is that you can apply them now, not later.With the right information and consistent practice, every first responder has the potential to be a strong, effective peer. Your awareness, presence, and willingness to help can make a lasting difference in the lives of your colleagues.Stay informed, stay connected, and take care of yourself and each other.