• Email: aristeidis.tsakiris@un.org
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Bio

Aristeidis Tsakiris is a Mechanical Engineer with over ten years of experience driving energy efficiency initiatives globally. With an MSc in Sustainable Energy from the Technical University of Denmark (DTU), he combines technical expertise with a deep understanding of policy and digital systems to support sustainable development in emerging and developing economies.

At the UNEP Copenhagen Climate Centre (UNEP-CCC), he leads the development of Monitoring & Evaluation systems, digital dashboards, and web-based Knowledge Management Systems (KMS). His work enhances data-driven decision-making and supports the dissemination of best practices through webinars, podcasts, and e-learning platforms, while also contributing to project development, reporting, and stakeholder engagement.

Previously, Aristeidis held key roles at the Copenhagen Centre on Energy Efficiency (C2E2), where he managed digital tools, coordinated over 100 webinars, and supported international workshops and publications. His early career in research and consultancy focused on energy-efficient buildings and transport, laying a strong foundation for his current impact in global energy transition efforts.

• Email: debbie.weyl@wri.org
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Bio

Debbie Weyl is the Manager, Building Efficiency with the WRI Ross Center for Sustainable Cities. She manages the Building Efficiency Accelerator, a global partnership to accelerate building energy efficiency in cities around the world. Prior to WRI, Debbie worked for 5 years at CLASP to improve globally the environmental and energy performance of appliances, lighting and equipment, and for 2 years at the U.S. Department of Energy on energy efficiency programs in the United States.

• Email: wfong@wri.org
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Bio

Senior Associate and Global Lead for TRAC City Project under the Global Climate Program and WRI Ross Center for Sustainable Cities at World Resources Institute that promotes data-driven city climate actions. TRAC City supports cities to set ambitious and measurable greenhouse gas reduction targets, plan and implement transformative actions to reduce emissions, and measure greenhouse gas performance consistently and transparently using standardized methodologies.

• Email: Carley.Chavara@wri.org

Bio

Carley is a Research Analyst with the Global Climate Program. She supports cities in tracking and reducing greenhouse gas emissions through publication development, e-learning, and application of the GHG Protocol for Cities (GPC). Carley also works with the Building Efficiency Accelerator to conduct emissions assessments of policies and projects and draft publications.