As international institutions like the United Nations Development Programme (UNDP) continue to mainstream lesbian, gay, bisexual, transgender, intersex, queer (LGBTIQ) and sexual orientation, gender identity/expression, sex characteristics (SOGIESC) considerations within their programming and practice, the question remains, are the voices of the most vulnerable included? This chapter utilizes a human security approach as a means to examine the structural oppressions and systemic marginalizations hindering the progression of LGBTIQ/SOGIESC inclusion within international development practices. It examines the three major components of human security, the freedom from fear, the freedom from want and the freedom to live with dignity, in order to reconceptualize each original UNDP human security measure, including economic security, food security, health security, environmental security, personal security, community security, and political security, from a LGBTIQ perspective. In doing so, it highlights how the numerous vulnerabilities impacting the lived realities of LGBTIQ persons become situated among the interlinkages between international development, human rights, and security praxis. By comprehensively examining the interlinkages of said praxis, in addition to the multidimensional complexities impacting the lived reality of LGBTIQ persons, this research can help advance the promotion and protection of LGBTIQ inclusion within international development.