Secretary Emmanuel M.  De Guzman is an international expert on disaster risk reduction and climate change adaptation, having spent the past 30 years of his career working in the public sector and civil society organizations.

In the public sector, he served as deputy administrator at the Office of Civil Defense-National Disaster Coordinating Council (1998 to 2001) in the early part of his career.

Outside government, he has provided technical advice to various United Nations agencies and various governments in Asia on implementing the Hyogo Framework for Action 2005-2015 and the Sendai Framework for Disaster Risk Reduction 2015-2030.

From 2007 to 2015, he served as senior advisor on disaster risk reduction at the World Meteorological Organization and the UN Office for Disaster Risk Reduction in Geneva, Switzerland, promoting high-level advocacy and multi-stakeholder partnership on disaster risk reduction and climate change adaptation at all levels.

After being appointed to the Climate Change Commission in September 2015, he led the Philippine delegation to the 21st  Conference of Parties to the United Nations Framework Convention on Climate Change and successfully advocated for the integration of the 1.5°C warming cap in the Paris Agreement.