Preslava is an Assistant Professor at the Department of Global Health and Development. She received her PhD in International Relations from the Department of Politics at the University of Exeter and holds a BA Magna Cum Laude and a first class MA in International Relations. Her doctoral research studied the development of international legal norms through the lens of social constructivism and the sociology of scientific knowledge. Empirically her work focused on the construction of the international norms banning torture, cruel, inhuman and degrading treatment or punishment, the TRIPs agreement in relation to the pharmaceutical industry and the emergence of the norm to prevent catastrophic climate change. Preslava is currently researching the global politics of health security, including the conceptualisation of health security in fragile and conflict-affected states, as well as global health governance and the global politics of human rights. Preslava is a qualitative research with a background in international relations theories, which she uses to questions of global governance, security politics, international law and norm development.

Preslava has taught a range of undergraduate and graduate courses at British and American Higher Education Institutions, covering diverse international relations topics including security studies, the politics of public international law, human rights, global governance (including actors and institutions), international relations theories, and research methods. At LSHTM, Preslava contributes to teaching on Health Policy, Process and Power and Globalization and Health. She supervises Master's dissertations and Research Degree students.

Preslava is a Senior Fellow of the Higher Education Academy.