In prior years, she has taught international law, international environmental law, human rights and United Nations courses in the School of Diplomacy as an Adjunct Professor and was appointed as a Fellow of the Center for United Nations and Global Governance Studies. She is the founder and president of an NGO accredited to ECOSOC at the United Nations, the Tinker Institute on International Law and Organizations, and regularly participates in summits, preparatory committees and working groups on sustainable development and international law at the UN. She is a consultant and frequent speaker for conferences and professional meetings. Tinker has published widely in her field of expertise in International Environmental Law and Sustainable Development, International Law and International Organizations.