In this episode of Lives in Leadership, Dr Lucas Marie speaks with Rear Admiral James Lybrand, Commander of the Australian Defence College, whose naval career spans from the submarine force to senior strategic leadership roles. Drawing on decades of operational and educational experience, Rear Admiral Lybrand shares his journey from leading underwater warfare operations to shaping Defence’s professional military education enterprise. He discusses the evolution of his leadership style — from decisive command at sea to reflective mentorship in strategic settings — and the importance of humility, delegation, and trust. He also reflects on the unique challenges of submarine leadership, lessons from high-pressure missions such as the search for MH370, and how the Australian Defence College is preparing future leaders through critical thinking, collaboration, and lifelong learning.