This study analyses categorization processes about the secretary in a research interview between the researcher and the gatekeeper (Roberts, 2000) responsible for selection, who accesses information about employer and employee, building the candidate`s profile. The aim of the research is to identify the categories, as well as their function in the data, and the forms by which the participants interactionally brought them to speech, since they compose categories` discursive meanings. On the analysis, qualitative interpretative, a micro socio-interactional perspective is adopted. The researcher participates on the interview, obtaining an intra-discursive view of data. On theory and analysis, studies about membership categorization processes and about common-sense knowledge (Sacks, 1992; Garfinkel, 1967; Polanyi, 1969) are essential to understand the participants` meaning activities. Studies about job interviews (Silveira, 1998) display the interactional influence of the institutional context. Also relevant are studies about discursive voices (Günthner, 1997) and interactional mapping (Sarangi, 2007). Therefore, this research, observes categorization in its contexts, forms and voices. The analytical results reveal the influence of categorization on the selection process. A web of relationships, between categories of members, activities, appearance and others, takes place during the discourse in the data. This research aims to contribute to the theories of categorization and also to discourse studies about job interviews and selections.