Energy transition · Transición energética

Connecting energy policy with international cooperation.

I'm a specialist with more than 16 years of global experience in international affairs and cooperation in the energy sector — from Mexico's Ministry of Energy to the World Bank's Energy Sector Management Assistance Program (ESMAP).

Washington DC EN · ES · Multilateral
Portrait of William Jensen-Díaz

About · Perfil

Policy, diplomacy, and the low-carbon economy

For more than 16 years I have worked at the intersection of energy policy and international cooperation: research on policies and best practices for transitioning to a low-carbon economy, decarbonization, and the deployment of emerging technologies such as green hydrogen.

My work spans energy policy advisory, strategic engagement, and donor coordination across government, bilateral cooperation, and multilateral institutions. I have advised both public agencies and international energy companies as they navigate the investment and policy landscape of emerging economies.

Career milestones include the U.S. State Department's International Visitor Leadership Program on renewable energy and climate change (2012), a Chevening Scholarship from the British Government (2015–2016), and an Edward S. Mason Fellowship at Harvard Kennedy School. I serve as Community Development Co-Director of Harvard Alumni for Climate and the Environment and Co-Chair of the UCL Washington DC Alumni Association.

Education · Formación

  • Mason Fellow
    Harvard University, John F. Kennedy School of Government
    Master in Public Administration (MC/MPA)
  • Chevening Scholar
    University College London
    MSc in International Public Policy
  • Francisco Xavier Clavigero SJ Medal
    Universidad Iberoamericana Puebla
    BA in Political Science and Public Administration

Experience · Trayectoria

Sixteen years across four institutions

From Mexico's federal energy ministry to bilateral cooperation with Germany, research at Harvard, and the World Bank in Washington DC.

  • World Bank — ESMAP
    Consultant · Donor engagement, stakeholder management, and strategic analysis for the Energy Sector Management Assistance Program
    Washington DC
  • Harvard University — Belfer Center
    Research Assistant · Best practices for green hydrogen technology deployment and new energy technologies
    Cambridge, MA
  • GIZ — German-Mexican Energy Partnership
    Senior Advisor · Advisor to Germany's BMWi/BMWK and the G20 Energy Working Group during the German G20 Presidency; green hydrogen, energy transition, and net-zero policy
    Mexico City · Germany
  • Mexico's Ministry of Energy (SENER)
    Deputy Director for North America, Europe, and Asia · Deputy Director for International Affairs · Head of Department for North America, Europe, and Asia
    Mexico City

Publications · Publicaciones

Studies and contributions

Contributions to publications and studies on energy, politics, and international cooperation — available in English and Spanish.

Green Hydrogen in Mexico: towards a decarbonization of the economy

A series of seven volumes by GIZ Mexico (German-Mexican Energy Partnership) on production potential, uses, job creation, and exports of green hydrogen — the first extensive study published in Mexico about the new hydrogen economy. I participated as editor and supervisor.

View the series 10 documents · EN / ES

Hydrogen in Latin America

From near-term opportunities to large-scale deployment. Participated in the peer-review process, conducted and published by the International Energy Agency (IEA).

Digitalization and Solar Energy

Joint publication by GIZ, ASOLMEX, and SolarPower Europe.

Improving and Refocusing Electricity Subsidies

Alternatives to electricity subsidies in Mexico.

Mexico's New Energy Era

Study about the institutional framework and investment opportunities in Mexico.

View the study 2 documents · EN / ES

Phasing out inefficient fossil fuel subsidies — Mexico & Germany, G20 peer review

OECD document translated and edited in Spanish. Also available on the OECD website.

Compendium of Energy Efficiency Policies of APEC Economies

Asia Pacific Energy Research Centre (APERC) publication. Also available on the APERC website.

Newsletter · Boletín

Writing on energy & cooperation

I publish notes and analysis on the energy transition, international cooperation, and the low-carbon economy on Substack. Subscribe to receive new pieces directly in your inbox — or read the latest on Substack.

Read on Substack ↗