The emotional challenges Human Resource Professionals (HRPs) face, and the work they do in managing emotion in day to day HR practice, have largely gone unacknowledged and unsupported and yet is arguably HR's most value-added activity. Through in-depth interviews and diary study, we uncover the emotion handling aspect of HR work. Specifically we explore Emotional Labour (EL) which, despite its centrality to HR work, remains under-researched in the HR context. By asking our participants to recount and reflect on emotive interactions, we examine HRPs' use of EL in their relational work; how they come to learn the emotion display rules of their role; the strategies they use to cope with such emotional demands and the factors that help/hinder this process. Our contribution is to surface' emotion in HR work and identify how organisations can prepare HRPs for, and support them in, their emotion handling efforts.