Chapters

Connect with TSC members around the world.

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About Chapters

While TSC connects leaders globally, we also create space for local exchange. In select cities, members host meet-ups and dinners to connect in person, share insights, and build trusted relationships. These gatherings are informal yet intentional—no stage, just meaningful conversations among peers. Each local group is coordinated by an ambassador.

Global Reach, Trusted Circle

A private network connecting the world’s top sustainability leaders—globally aligned, locally rooted.

Meaningful Local Connection

Curated in-person gatherings that foster deep relationships and trusted peer exchange in your city.

Regular Events

No stage, no noise—just intimate meetups and dinners hosted by ambassadors who understand your journey.

Our Global Chapters

Connect with sustainability professionals in your region through our local chapters.

Berlin

Germany
Chapter Ambassador
Maximilian Schmitt
Founder
The Sustainability Circle
Join Chapter

USA

United States
Chapter Ambassador
Sandra Leyva Martinez
Head of Sustainability (Sr. Director)
CHEP
Join Chapter

Stockholm

Sweden
Chapter Ambassador
Mikael Salo
CSO
DistIT & State of Sustainability
Join Chapter

Copenhagen

Denmark
Chapter Ambassador
Jamieson Saab
Global Head of Sustainability
Wolt
Join Chapter
Become a MemberView all Events

Upcoming Events

Here you can find all upcoming meet-ups, dinners and other TSC in-person events.

Stockholm TSC Autumn Kick-off

August 27, 2025
Register to See Address
Learn more

Berlin TSC Autumn Kick-off

September 11, 2025
Register to See Address
Learn more
View all Events

Our Ambassadors

The people who drive TSCs community in their local areas. 💜

Maximilian Schmitt
Founder
The Sustainability Circle
Chapter Ambassador: Berlin 🇩🇪
Max is one of the co-founder of TSC. Based in Berlin, he leads TSC’s flagship Home Chapter, where he brings members together to exchange ideas, spark collaboration, and accelerate sustainable change at the local and global level. With a background in climate tech, Max is passionate about building products and communities that drive real environmental impact.
Jamieson Saab
Global Head of Sustainability
Wolt
Chapter Ambassador: Copenhagen 🇩🇰
Jamieson leads global sustainability at Wolt, shaping strategy on emissions, sourcing, and last-mile logistics. With a background in international development and private sector sustainability, he’s built a career on turning ambition into action. As Copenhagen’s TSC ambassador, he’s curating meaningful peer connections that accelerate real-world impact.
Sandra Leyva Martinez
Head of Sustainability (Sr. Director)
CHEP
Chapter Ambassador: USA 🇺🇸
Sandra leads CHEP’s sustainability efforts across the Americas, focusing on decarbonization, circularity, and customer collaboration. With a career spanning Amazon, KION Group, and beyond, she brings deep operational insight into building scalable sustainability strategies. At TSC, she’s fostering a powerful US network where ideas and expertise flow across industries.
Mikael Salo
CSO
DistIT & State of Sustainability
Chapter Ambassador: Stockholm 🇸🇪
Mikael is a leading voice in Sweden’s sustainability landscape. At TSC, he leads the Stockholm Chapter — creating space for cross-sector dialogue, local leadership, and real momentum toward a more sustainable future. With a background in journalism and policy, and as Editorial Director of Aktuell Hållbarhet, he brings decades of experience shaping national debates on climate, ESG, and corporate responsibility.
Become a MemberAbout Us

Become a Chapter Ambassador

Lead the sustainability movement in your city by becoming a TSC Chapter Ambassador.

  • Regional Leadership
    Become a recognized sustainability leader in your region, organizing local events and building your network.
  • Exclusive Access
    Gain direct access to TSC's global community of senior executives and sustainability experts.
  • Resources & Support
    Receive TSC's support, including event templates, marketing materials, and speaker connections.
Apply to Become an Ambassador

Become a TSC Member and
Join Your Local Chapter

Want to learn more about TSC initiatives in your region? Reach out to your local ambassador or contact our team.

Check If You Qualify