Self-efficacy is central to effective academic nursing leadership since it influences decision-making, resilience, and organizational outcomes. This phenomenological study described the essence of leadership self-efficacy among nurse leaders in Philippine higher education institutions. Using Colaizzi's method, data was collected through semi-structured interviews (n=10) and one focus-group discussion (n = 8). Analysis yielded three interwoven essences: (1) Personal Capacities of a SelfEfficacious Leader (decisiveness, resilience, reflective composure), (2) Relational–Communicative Doing of Leadership (ethical consistency, collaboration, mentoring), and (3) Professional–Organizational Grounding (resource navigation, quality assurance, continuous learning). Recognition indicators of achieved self-efficacy included sustained goal attainment, composed decision-making, entrustment by stakeholders, reduced self-doubt, and ethical consistency. Findings suggested that academic nurse leaders' self-efficacy is a multi-dimensional structure rather than a linear developmental process. Implications were offered for leadership preparation, mentoring, and appraisal.