As a PhD student, I was guided in my research by the methodological assumptions of a qualitative perspective in management and organisation. This case study highlights the importance of knowing the ontological and epistemological assumptions of the discipline from which one is researching. Importantly, it sheds light on the way methodological assumptions lead to and support decisions about the adopted research methods or tools. The main purpose of the case in this research context is to set out in practical detail the social and analytical processes required of the researcher when adopting the key informant technique. The key informant technique, often referred to as the in-depth interview, is characteristic of interpretative qualitative research and ethnographic field research more broadly.