Valuing Impact is a global consultancy that partners with businesses and investors to help measure, understand and act on their impact to unlock strategic, societal, and environmental value.
15 years in the making
Where valuing social and environmental metrics alongside financials gives a more holistic view of success. We envision a future where impact intelligence is the cornerstone of decision-making, enabling confident investment in positive change.
Key numbers
organizations supported, from leading international businesses to investment funds and family offices
impact valuations since 2015
influential whitepapers, methods and datasets published
international experts ready to scale your impact
Meet the team
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 established the company as one of the world’s leading boutique consultancies 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/Managing Director BR
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.
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.
Jessica Hammer. Head of LATAM
Jessica has extensive experience in social entrepreneurship and impact strategies in Latin America. She spent 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 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. Senior Associate
Edgar is an experienced consultant in sustainability, impact valuation and SROI. His background in food and energy systems provides valuable expertise to the Valuing Impact team.
Rhys Gabriel. Senior Consultant
Rhys has 6 years of experience working with impact valuation, across various sectors and focused on methodology development. He is currently undertaking a Masters degree alongside his work leading impact accounting projects at Valuing Impact.
Isabel Klennert. Senior Consultant
Isabel has degrees in computational science and mathematics, as well as experience at Deloitte. Isabel works at the intersection of analytics and sustainability, turning complex information into practical, decision-ready insights.
Cristina Renedo. Senior Consultant
Cristina is an economist by training with over 8 years of experience across strategy consulting and impact-focused roles. She has a strong track record in impact measurement and valuation (LCA, SROI), ESG and impact strategy, and the design of outcome-based financing instruments, working with companies, investors, and development partners across Latin America.
Non-executive advisory board
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
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