Guillermo Martinez is a Senior Financial Analyst at Climate Policy Initiative (CPI), where he works at the intersection of climate, nature, and finance in Latin America and the Caribbean, developing and supporting innovative blended finance solutions. 

With experience across the public and private sectors, Guillermo has contributed to the design and implementation of multiple financial instruments under the Global Innovation Lab for Climate Finance and the Catalytic Climate Finance Facility, aimed at channeling investment into climate and nature across the region. He has collaborated with impact investment funds, national development banks, multilateral institutions, and corporates that seek to invest in climate and nature. 

He also serves as Senior Program Associate for the Lab’s Pre-Seed Capital Facility, which provides working capital to selected Lab instruments, and as a data analyst for the UK Climate Public Private Partnership (CP3), a market mechanism that leverages private equity to mobilize capital toward low-carbon, climate-resilient enterprises in emerging markets. 

Guillermo has co-authored some CPI publications, including Partnering to Finance Adaptation, State and Trends in Climate Adaptation Finance 2023, and the Corporate Climate Finance Playbook. 

Prior to CPI, he worked at the British Embassy in Mexico City, supporting the implementation of the COP26 agenda on energy, mobility, and nature-based solutions. He also interned at GIZ, contributing to projects that strengthened policy frameworks on the energy–climate nexus. 

Guillermo holds a B.S. in Sustainable Development Engineering with specialization in low-carbon energy systems from Tecnológico de Monterrey and an M.A. in Climate and Society from Columbia University.