Emotion is a growing focus for contemporary thinking about leadership in public policy and corporate arenas. In British education systems, three imperatives are evident: the idea that transformation is essential; leadership succession in crisis; and, more recently, that leaders must be able to run organisations that address the emotional well-being of staff and students. Viewed as a key outcome of schooling, its importance is mirrored in school leadership, especially professional development. This article considers whether this represents a step-change in leadership development praxis or is, instead, an invasive form of emotional engineering redolent of long-established orthodoxies of control and domination. If so, it is argued, leadership development as the advocacy of emotional acumen presents moral technology as a new form for intervening in leaders' emotional selves, thereby distracting them from addressing fundamental aspects of education for which they are primarily responsible.