In a post-9/11 environment, the Department for International Development (DFID) shifted its strategic focus towards an integrationist approach that aligned mainstream development programming with the national security agenda. A key part of those reforms was integrating counterterrorism – directly and indirectly – into DFID's portfolio. Using a feminist institutionalist approach, I examine how discourses about women, development, security, and counterterrorism are reproduced through a ‘development-security-counterterrorism nexus’. Within the nexus, DFID represents a key site for the production, reproduction, and evolution of gendered discursive practices1 about women. I argue that institutional evolution is possible through a process of discursive evolution where certain discourses become more or less engrained or ‘sedimented’2 depending on the presence of alternative ideas and knowledges. The central research question asks how did gender-sensitive development work evolve after 9/11 and what factors influenced and shaped this evolution? The main findings were that as counterterrorism aims, objectives, and methods became more emphasised in UK development programming, a sense of institutional incoherence and poor strategic direction adversely affected how gender-sensitive programming was designed and implemented. Furthermore, I conclude that gendered development policy was largely based on assumptions rather than evidence, which negatively impacted how programmes were implemented.