Building Sustainability Systems That Withstand Scrutiny

Sustridge was founded to bridge the gap between sustainability ambition and operational reality.

As sustainability expectations shift from voluntary reporting to regulatory compliance, investor oversight, and assurance scrutiny, companies need more than vision statements. They need systems.

With more than 15 years of experience across energy, food and beverage, manufacturing, logistics, dairy, and technology sectors, Sustridge focuses on building sustainability and carbon programs that are structured, defensible, and aligned with business performance.

We help organizations move from aspiration to execution.

Our Focus

Sustridge specializes in integrating:

Audit-ready greenhouse gas inventories
Carbon governance and internal controls
Double materiality assessments
Science-based targets and decarbonization strategy
Strategic sustainability program design
Regulatory-aligned ESG reporting

Our work is grounded in recognized frameworks, including:

GHG Protocol
ISO 14064
CSRD and ESRS
ISSB and TCFD
GRI and SASB
Science Based Targets initiative

We do not treat sustainability as a communications exercise. We treat it as a governance and risk management discipline.

The Team at Sustridge

Josh Prigge

Founder and Principal Consultant

Josh Prigge brings more than 15 years of corporate sustainability and ESG leadership experience.

His career spans in-house sustainability leadership roles and advisory work across multiple industries. He has supported organizations ranging from fast-growing mid-market companies to global brands navigating complex climate and disclosure requirements.

His work includes:

Greenhouse gas inventory development across diverse sectors
Audit-ready carbon system design aligned with GHG Protocol and ISO 14064
Scope 3 methodology development and improvement
Double materiality assessments aligned with ESRS
Science-based target development and SBTi submission support
Decarbonization strategy modeling
End-to-end ESG report development
Sustainability governance and program architecture
Regulatory and investor-aligned reporting preparation

Josh is known for combining technical rigor with practical business understanding. He works closely with executive leadership, finance teams, operations, and sustainability leaders to design systems that integrate into existing organizational structures.

He is also the co-founder of North Star Carbon and Impact, a carbon and ESG management platform designed to streamline emissions accounting, documentation, and reporting workflows.

Chris Barzman

Senior Sustainability Consultant

Chris Barzman is a sustainability consultant and tourism sector expert with over two decades of experience helping organizations operationalize best practices and leading high performing teams. Chris expertise in the tourism industry comes from having worked with some of the largest organizations in travel. Chris worked as a Regional Manager for Expedia, where he served for almost a decade and was the local representative for the Sustainable and Green Expedia committee.

Chris earned a Master’s degree in Global Leadership & Sustainable Development from Hawaii Pacific University, conducting his thesis work on Sustainable Tourism. He also holds a B.S. in Integrated Marketing Communications from San Diego State University. With studies at Oxford University, U.K., Deakin University, Australia and at Sungkyunkwan University, Korea, Chris was able to develop a wide breadth of perspectives and insights.

Chris is a strategic advisor and former President of the Sustainable Tourism Association of Hawaii, and is member of SKAL International and REEF International.

Katie Zimmerman

Sustainability Analyst

Katie is a multidisciplinary professional passionate about the intersection of human and planetary health.

Katie is a graduate of Indiana University. Katie serves as a sustainability analyst, performing ESG data collection and research for Sustridge Sustainability and North Star Carbon & Impact.

She also facilitates STEM garden teacher training, empowering educators to connect students with the natural world through hands-on learning. Her passion for education and sustainability also shine through her work as a podcast editor for the Sustainable Nation Podcast and the North Star Carbon Accounting and Management Podcast.

With a unique blend of skills spanning education, sustainability, and media, Katie is driven by a mission to build a more informed and resilient world.

Clients

Sustridge is proud to work with organizations of all different sizes from all types of industries - from three-person startups to Fortune 500 companies. We are grateful to have established collaborative partnerships with ambitious organizations that strive to make the world a better place.

“Josh was always willing to help where he was needed, he ensured we stayed on our timeline and he helped produce a sustainability report we are proud of. I would recommend Josh as a sustainability consultant based on our experience.”

— Bruno Sarda - Chief Sustainability Officer, NRG (now President, CDP North America)