Marcio Viegas


| Founder and Managing Director

SUST4IN: sustainability experts and activists

Marcio is the founder and managing director of SUST4IN. He is a director-level executive and entrepreneur with 20+ years of experience in professional services in 30 countries: Consulting, Training, Auditing, plus International Standards and Regulatory development. Within this period: 20+ years dedicated to Sustainability, 10+ years to Sales & Marketing/Business Development, and 10+ years’ leadership experience at Director/Statutory level.

Marcio has a solid background in Engineering and Sustainability, combined with an MBA. He is fluent in English, Spanish, and Portuguese, plus intermediate French. He has published articles and interviews for various global and local media outlets: Environmental Finance, ISO Focus, Quality World, RNE Exterior; Spain (RTVE, RNE, Expansión, El Economista, Radio Intereconomía, Diario Responsable); Brazil (TV Record News); Italy (Il Sole 24 Ore) and others. He has traveled extensively to more than 70 countries, lived in Sao Paulo and London, and has chosen Madrid to live since 2005. He has dual Spanish/European and Brazilian citizenship.

Marcio Viegas

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Our Council Members

Rafał Modrzewski

Stephen Young

Carmine Di Sibio

Fabio Scalet


Recognizing it will take alignment of all our organizations to scale impact globally, we invite you to join the movement as a Steward of inclusive capitalism. Together, the collective action of Council members will contribute to a fairer, more inclusive and sustainable future for all people and our planet.