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Our Team

Leading the way in organizational carbon accounting and mitigation strategy.

Mark van Soestbergen

Mark van Soestbergen

President & Founder

Mark has been leading organizational GHG Accounting and carbon strategy since 1998, helping global clients navigate complex climate challenges with data-driven insights.
Stephen Marsh

Stephen Marsh

Transportation Specialist

Stephen is a recognized expert in the GHG impacts of transportation fuels and infrastructure, focusing on lifecycle analysis for logistics and fleet operations.

Michael Amish

Michael Amish

Materials Consultant

Michael specializes in the sustainability of building materials and operational energy efficiency, providing technical audits for high-performance built environments.

Chris Fillie

Chris Fillie

Sustainability Advisor

Chris serves as a technical advisor for international carbon projects and renewable energy systems, managing cross-border compliance and reduction modeling.