This study aims to investigate the identity construction of the Head of the English Department, with a focus on evaluation. The theoretical framework is based on the concept of identity construction according to socio constructionist (Bhabha, 1994; Bucholtz and Hall, 2003, 2005; Moita Lopes, 2002, 2003) and sociological (Bauman, 2005; Giddens, 1999; Hall, 1992) theories that conceive identity building as a process developed in discourse during interaction. For an analysis of the interaction, the notions of frame (Goffman, 1974), knowledge schemas (Tannen and Wallet ([1987] 2002), footing (Goffman, [1979] 2002), and face (Goffman, [1967] 2011) are considered. Evaluation is approached from the following perspectives: the labovian theory of narrative (Labov and Waletzky,1967; Labov,1972), the socio constructionist notion of narrative as social practice (Bastos, 2005; Bruner, 1997; Cortazzi and Jim, 2001; Linde,1993; Mishler, 1999; Moita Lopes, 2003), the Socio Cognitive Theory of Metaphore (Gibbs, 1994) and Appraisal Theory (Martin, 2003; White, ([2001] 2012). This research, which follows a qualitative-interpretative approach, was carried out at a school from the private sector in Rio de Janeiro. Apart from the teacher researcher, four English teachers participated in this work as well as the Head of the English Department and the principal and vice-principal of the institution. Results show that during the interaction participants re-signify their interpretations with respect to the identities of the Head of the English Department, who is regarded as a mediator or manager of processes, situations and relationships. The data reveals that affection, judgment and appreciation permeate the Head of the English Department identity construction, which is also constituted by power relations and influenced by the institutional identity.