Reconciliating the logics of Post-method Era, Critical Pedagogy, and Sociocultural Theory in its conceptual framework, this study postulated Iranian EFL teachers’ socio-pedagogical identity as comprising conformity, criticality, and conformity-criticality mediation in order to explore and model the different aspects of Iranian EFL teachers’ “transformative teaching self,” probably contributing to their pedagogical ZPD and sociocultural identity development. To this end, Systematic Reflexive Constructivist Grounded Theory was utilized as the methodology of this 63-participant study managing both the data collection procedures, i.e. interview, focus group, observation, field notes, and document analysis, and the data analysis procedures, i.e. tabulation, open coding, initial memoing, axial coding, intermediate memoing, selective coding, advanced memoing, and theoretical sampling. The findings of the study were put into a putative model, delineating Iranian EFL teachers’ transformative teaching self at its core, which can constantly stimulate the teachers’ three interactive triplex identity types, i.e. conformative, critical, and mediational identities. Finally, this study entailed some implications such as updating teachers’ knowledge of mediational identity, professional retraining about mediation, encouraging teachers to achieve an understanding of their transformative teaching self, and preparing them to be efficient transformative teaching learners and practitioners of the model in this study.