Illari is a lawyer with a background in human rights, development programming and international environmental law. She currently works with the lead negotiator for transparency of the Least Developed Countries (LDC) Group at the UN climate change negotiations.
Illari supports the Least Developed Countries (LDC) Group at the United Nations Framework Convention on Climate Change (UNFCCC) negotiations. She works with the LDC lead negotiator for transparency. She is also working on national policy work related to transparency under the Paris Agreement.