Decent Work (DW) is an aspirational concept introduced in 1999 by the International Labour Organization (ILO) and is currently part of the 8th Sustainable Development Goal of the United Nations 2030 Agenda. It is a fundamental pillar for sustainable organizational performance, contributing to employee well-being, motivation, and productivity, and, in highly structured environments such as the military and academia, can be differentiated. This study examines the relationship between leadership influence on employees' perceptions and DW. Leadership plays a crucial role in fostering conditions that support DW. Three key leadership approaches are explored: Empowering Leadership, which enhances employee autonomy; Responsible Leadership, which aligns organizational activities with the broader ecosystem; and Ethical Leadership, which ensures consistency between actions, values, and moral principles of the organization and society. This study aims to study the impact on DW through interventions designed for leadership development. The research was conducted in two distinct contexts: the Portuguese Air Force and one of the oldest universities in Portugal, Coimbra University. Both have hierarchical structures and specific challenges that make leadership analysis particularly relevant. Participants include leaders and teams from both organizations based on voluntary participation. Several instruments measuring DW and leadership practices were applied through a three-wave mixed-methods study within a participatory intervention approach. The results will be presented and discussed, highlighting the impact of leadership interventions on DW perception and offering practical insights for fostering positive organizational change.