Resilience is a key protective factor in youth mental health, enabling individuals to adapt successfully in the face of adversity. This chapter explores resilience through the frameworks of positive psychology and systems theory, conceptualizing it as a dynamic, developmental capacity influenced by individual, relational, and contextual factors. Focusing on childhood and adolescence, the chapter emphasizes the critical role of schools and families in fostering resilience. Educational settings are highlighted as powerful environments for promoting social-emotional learning, coping strategies, and a sense of belonging—essential components of resilient development. Within a systems perspective, family resilience is examined through family systems theory, underscoring how individual strengths, supportive relationships, and environmental resources interact to shape life outcomes. The chapter also extends the discussion to resilience in the workplace, bridging youth development with adult functioning. It argues that early experiences with emotional regulation, problem-solving, and supportive relationships lay the groundwork for resilient behaviors in professional contexts. As students transition into adulthood, the skills and mindsets developed in schools contribute to their ability to navigate stress, adapt to change, and thrive in complex work environments. Promoting resilience in youth is framed not only as a mental health priority but as a long-term investment in building adaptable, empathetic, and capable adults. The chapter concludes with practical recommendations for school psychology practitioners, emphasizing the importance of culturally responsive, evidence-based strategies that support youth development and prepare students to meet the challenges of adult life, including those they will face in and out of the modern workplace.