Our Team

Our team comprises dedicated consultants and advisors with deep expertise in impact valuation, ESG strategy, and sustainability. Valuing Impact's mission is to help organizations integrate the value of human, social, and natural capital into decision-making, by providing innovative methods, data, and experience.

Samuel Vionnet

Founder and Director

Samuel has 15 years of experience in the field of impact valuation consulting for businesses and investors. He created Valuing Impact in 2015 and has since then establish the company as one of the world's leading boutique consultant on impact valuation

Pedro Tagliari

Operations Manager

Pedro is an engineer by training, holds an MBA in Corporate Sustainability from Colorado State University, and boasts expertise in data science. He has a robust ESG analysis, strategic consulting, and project management track record.

Andreza Souza

Senior Partner

Andreza spent her early career at Natura Cosmetic based in Sao Paulo and was in charge of the impact valuation effort of Natura Integrated Profit & Loss. She is an expert on impact valuation.

Noelia Pacharotti

Senior Consultant

Noelia has an extensive experience in public policies assessment and impact investing. She has recently joined the team of Valuing Impact to extend our services towards impact investors and family offices.

Helena Couto

Senior Consultant

Helena is an environmental engineer and is currently specializing in Impact Finance and ESG at Fundação Getúlio Vargas - FGV. She has experience in corporate ESG and consulting working with sustainability indexes, reports and projects focused on climate change.

Suzanne Andrea Lopez

Executive Assistant

Suzanne has a 10 years experience in management, HR and marketing. She is based in Guatemala and supports the global team of Valuing Impact to deliver projects with higher efficiency.

Jessica Hammer

Senior Consultant

Jessica has a long experience in social entrepreneurship and impact strategies in Latin America. She spend the last few years as the Director of Cultivation at Alterna, a startup incubator in Guatemala.

Ligia Moreno Soares

Communication manager/Senior Consultant

Ligia brings a valuable consulting experience to Valuing Impact from The Economist and Bluebell Index. With her deep understanding of impact measurement and valuation, she leads our communication strategy to scale-up our impact!

Edgar Sacayon

Edgar Sacayon

Senior Associate

Edgar is an experienced consultant in sustainability, impact valuation and SROI. His background in food and energy systems provides valuable addition to Valuing Impact team.

Rhys Gabriel

Senior Consultant

Rhys has 6 years of experience working with impact valuation, across various sectors and focused in methdoology development. He is following a master in paralle to leading impact accounting projects at Valuing Impact.

Isabel Kennert

Consultant

Isabel has degrees in computational science and mathematic, as well as experience at Deloitte. Isabel works at the intersection of analytics and sustainability, turning complex information into practical, decision-ready insights.

Non-executive advisory board

Our non-executive board brings independent oversight and strategic guidance, ensuring that our methodologies remain rigorous and aligned with global best practices.

Marcus Bleasdale

Managing Director of Wilstar Impact Investing and Director of Sustainability

Naomi Rosenthal

Independent Advisor

Paul Reig

Founder, Bluerisk

Michele Pisetta

Director of Environment Sustainability, PMI

Duncan Pollard

Independent Advisor

Leslie Kapin

Partner and Impact Director, Astanor

Emelie Norling

Impact Director, Summa Equity

Estelle Roth

Global Head Giving & Volunteer, Novartis