Atty. Rachel Anne Sibugan Herrera is backed by 13 years of experience in environmental law and climate change legislation. She was a member of the Philippine Delegation to the 23rd Conference of Parties to the United Nations Framework Convention on Climate Change, the 2016 High-Level Signing Ceremony of the Paris Agreement on Climate Change, and the 3rd UN World Conference on Disaster Risk Reduction.

Before the appointment, Herrera provided legal and technical advice to the Senate and the International Committee of the Red Cross. She also worked as a court attorney at the Supreme Court. She is a graduate of the University of the Philippines College of Law and has a B.S. Environmental Science degree from Ateneo de Manila University.