This chapter explores the decolonial potential of Vernacular Security Studies (VSS) as both a methodological and ethical approach to field research in postcolonial contexts. While VSS has been widely recognized as a theoretical and critical framework, its implications for fieldwork remain underexplored, particularly in relation to research ethics and power dynamics. Drawing on field notes from a month-long study of the USAID-funded “Ma3an” CVE program in Tunisia, I examine how VSS informs the researcher’s positionality, relationships with participants, and interpretations of security narratives. By prioritizing local perspectives and resisting imposed security frameworks, this approach challenges dominant, often Eurocentric, understandings of security and radicalization. Instead, it foregrounds the agency of participants and the situated nature of their knowledge. Through reflexive engagement with these dynamics, this chapter argues that VSS constitutes a decolonial research practice that transforms how security is studied in postcolonial settings.