About

Our Purpose: Better Carbon Markets

Calyx Global is committed to ensuring that the growth of carbon markets leads to more impact – in the fight against climate change, in the quest to maintain a healthy planet and as a means to contribute to positive societal outcomes for individuals and communities around the world.

We believe that rigorous, independent, evidence-based insights and ratings for carbon credits can help ensure that the voluntary carbon market’s growth rewards credits that make the biggest difference. We want to work together in this pursuit with buyers, investors, traders and other market participants who care about integrity and impact. 

Calyx Global Team & Partners

Together in Pursuit of Better Carbon Markets

The growing team at Calyx Global includes climate and environmental scientists, geospatial information specialists, forest ecologists, social scientists, MBAs, product managers, SaaS veterans, and more. We come together to nudge the voluntary carbon market in the right direction, one rating at a time.

Our team and network of partners are spread globally. 

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Andy Tzou

Head of Product

Annelise Gill-Wiehl
Annelise GIll-Wiehl

Cookstoves / Household & Community Expert

Carlos Velazquez
Carlos Velazquez

SDG & GHG Analyst

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Chiara Canetti

GHG Analyst

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Deborah Lawrence

Chief Scientist

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Donna Lee

Co-Founder

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Duncan van Bergen

Co-Founder

Floor Oosterlee
Floor Oosterlee

SDG & GHG Analyst

Ivy Aygeiwaa Amponsah
Ivy Aygeiwaa Amponsah

SDG & GHG Analyst

UPDATED Linda Revera Macedo
Linda Rivera Macedo

SDG Manager

Matteo Lattanzi
Matteo Lattanzi

SDG & GHG Analyst

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Rahmi Ariani

Nature expert

Ryan Carrol (UPDATED)
Ryan Carroll

Nature & GIS Expert

Ryan Cooper
Ryan Cooper

SDG & GHG Analyst

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Tao Jiang

Nature & GIS expert

Wesley Roberts
Wesley Roberts

Nature & GIS Expert

Zihui Zhu
Zihui Zhu

Nature & GIS Expert

Partners

We work with some of the world’s foremost experts in carbon crediting to develop our ratings and ratings approaches.

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Independent Panels

Overseeing Calyx Ratings’ frameworks

Independent vetting of our ratings frameworks makes our work more robust – so you can have confidence in our ratings. Relying on many years of experience in carbon crediting and sustainability, the Calyx Global Independent Panels review and challenge our ratings frameworks.

GHG Panel Members

SDG Panel Members

Funders & Investors

We work with financial backing from foundations and institutional and private investors including these organizations.

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