Addiction workers play a crucial role in addressing the complex interplay between trauma and addiction, often navigating empathic connections with clients who have trauma histories. This study delves into the phenomena of vicarious trauma (VT) and vicarious post-traumatic growth (VPG) among addiction workers, exploring (counter)transference dynamics and the trauma–addiction nexus. Thematic analysis was conducted on narratives provided by six experienced addiction workers (mean age = 33 years, SD ≈ 5.86), comprising 33.33% men and 66.67% women. The analysis identified key themes including boundary dilemmas, therapeutic victories, defensive responses, and potential risk factors. The study highlights the detrimental effects of trauma on addiction workers while also revealing coping mechanisms and avenues for personal growth. Understanding the impact of trauma on addiction workers is vital for developing effective support strategies. By acknowledging both the risks of vicarious trauma and opportunities for vicarious post-traumatic growth, organizations can better support addiction workers and improve client care.