Attachment theory, originally formulated to explain emotional bonds in close relationships, has become a robust framework for understanding interpersonal and self-regulatory processes in work settings. The presentation integrates findings from our four empirical studies investigating how attachment mechanisms operate in organizational contexts, both toward leaders and within the self, across normal and stressful periods. Study 1 demonstrated that perceiving one's leader as an attachment figure mediates the relationship between work engagement and performance outcomes, highlighting leadership's role in providing a secure base at work. Study 2 extended these findings by distinguishing between transformational leadership effects and showing that leader attachment mediates their impact on task and contextual performance differently at the individual and organizational levels. Study 3 proposed a multidimensional model of workplace attachment, arguing for domain- and relationship-specific attachment representations that jointly predict well-being and work functioning. Finally, Study 4 provided experimental evidence that secure attachment priming produces long-term improvements in mental health among adults during stressful work periods. Together, these studies suggest that attachment security, whether derived from leaders or self-activation, enhances engagement and performance while buffering against stress and burnout. The presentation discusses theoretical and practical implications for applied psychology, including interventions that cultivate secure workplace climates and leadership behaviors that function as a psychological secure base. The integrative perspective supports applied psychology's mission to foster sustainable, healthy, and productive work environments by grounding its understanding of human connection in evidence. The presentation is part of the Vega grant 1/0112/24.