About Our Team

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Todd Fein Chief Executive Officer

Todd is a creative, driven, and dynamic executive, entrepreneur, and speaker, with a passion for sustainable development. Building on degrees…

Brian Prince Executive Expert - ESG, Sustainability Strategy & Reporting

Brian has over 25 years of environmental and sustainability experience in leadership roles spanning strategy, business development, innovation, information technology…

Dawn Rittenhouse Executive Expert - Sustainability

Dawn Rittenhouse is a seasoned, senior-level sustainability executive and subject matter expert. She not only currently consults through Green Diamond,…

Linda Froelich Executive Expert - Sustainability

Linda is a seasoned sustainability executive, with a passion for people and a deep background in agriculture and chemicals. In…

Tim Lindsey Executive Expert - Sustainable Innovation

For over 35 years, Dr. Tim Lindsey has helped hundreds of organizations increase their effectiveness through improved sustainability performance in…

Dale Sands Executive Expert - Sustainability, Resilience, Engineering

Mr. Sands is a sustainability executive with 40 years of experience across industries and geographies, having lived and/or worked internationally…

Peter Williams Executive Expert - Sustainability, Technology & Resilience

Dr. Peter Williams has 30+ years of experience helping businesses, governments, and NGOs adapt to and make the most of new technology,…

Johnny Huang Zhong Executive Director - International / Asia

Huang Zhong (Johnny)  is a dynamic executive and entrepreneur with 25 years of experience in the software, manufacturing, aerospace, venture…

Claire Turvill Sustainability Consultant

Claire’s aspiration is to help companies implement socially-responsible and sustainable operations that build a happier and healthier planet. She recently…

Joel Vardy SVP - Innovation

Mr. Vardy is a recognized Innovation, Manufacturing Automation, Supply Chain, Consulting and Technology visionary leader. His career has been marked…

Andreas Graesser SVP, Data & Technology

Mr. Graesser is a computer scientist and technology executive with more than 30 years of experience driving digital business transformation….

Michael Nutter Executive Expert - Public Policy

Mayor Nutter is a Green Diamond senior leader and consultant. After serving almost 15 years in the Philadelphia City Council,…