A Global Community for Future-Ready Sustainability Leaders.

TSC is an application-only membership for Senior Sustainability Leaders to navigate challenges, exchange insights and build career-defining connections.

Why Join The Sustainability Circle?

Your CEO wants short-term wins — and you’re out of ideas. You hop on a call with a peer who's been there. They share how they reframed the conversation. You leave with new language and a few quick wins.
Market or regulatory changes made your strategy obsolete. You need to pivot fast? Join a roundtable with others in the same boat. They share what they’re doing — and what’s not worth stressing about. Together, you shape a new plan to lead change in your company.
You’re about to sign a $50k contract with a consultancy. Before you do, you check in with the Circle. Others share how they scoped it tighter and got better results. You renegotiate, save $20k, and earn serious credibility with your CFO.
You’re evaluating carbon accounting platforms and lost in the requirements jungle. You ask who others picked and why. They share honest feedback — what actually worked in practice — so you can choose with confidence.
You need to negotiate your compensation. You wonder what market rates look like, how others split salary and bonus, and what arguments actually work. You connect with members who’ve done it recently — and walk into your conversation more prepared (and walk out with a better offer).
You just got out of a rough leadership meeting. You show up to your peer-group call, vent a little, and hear “been there.” You leave with three ideas for how to reframe the issue — and show up stronger next time.

Only Senior Leaders

We accept less than 15% of applicants. Only senior sustainability leaders sharing openly what works and what doesn't.

Chatham House Rule

Everything shared stays in the Community. Confidentiality is core and peers sign NDAs to speak openly.

Built for Busy Leaders

It takes 2 hours a month. We schedule  peer sessions around your calendar, based on your preferences during onboarding.

What You Get From a Membership

Join likeminded sustainability leaders to compare notes, tackle challenges and share the things that move your company forward today.

Sustainability Leaders Only

All members lead sustainability. We accept fewer than 15% of applicants to ensure the group stays senior, relevant, and focused.
Everyone speaks your language. Everyone is already working through complex topics like CSRD, Scope 3, and investor expectations.
Your own circle of strategic sparring partners. A tight-knit group meeting for monthly board calls — built to help you pressure-test decisions, unpack challenges, and move faster.
Everyone speaks your language. Everyone is already working through complex topics like CSRD, Scope 3, and investor expectations — no need to explain the basics.
Ask questions anytime. Whether you’re drafting a CSRD update, weighing an investment, or planning a strategy shift — post in one of the Executive Circle channels and get real-time input from experienced peers.
A promotional graphic with the headline "Leaders Only" in bold white text on a deep purple gradient background. The visual evokes exclusivity and professionalism, likely targeting senior-level professionals or executives. There is no additional text or imagery apart from the stylized background, which features a soft lighting effect and modern design elements.

Regular In Person Meetups

In person sessions focused on pressing issues. Whether it’s regulatory changes, decarbonization, or team structure. Each session ends with open discussion, so you can ask questions, compare experiences, and exchange insights.
Designed for open dialogue. Sessions are held under Chatham House Rule to ensure confidentiality and candour.
Led by fellow members for members. Facilitated to keep things sharp, relevant, and grounded in real-world challenges.
Real examples from within the Circle. Members walk through projects they’ve led. Sharing what worked, what didn’t, and what they’d do differently.
Get trusted recommendations. From consultants to carbon tools to internal comms decks — save time and money by tapping into what others already vetted.
A Zoom meeting screenshot showing eight participants, each in their own video tile, with names displayed: Christian, Inga, Andrea, Benjamin, Varsenik, Martin, Ramana, and Sandra. Most participants have their microphones muted. On the left side, a sidebar titled "Next up" lists upcoming events with dates and titles: 16.05: "After the Omnibus — Making Smart Moves While Adjusting Plans" 19.06: "From Cost Center to Value Driver: (Re)positioning Sustainability at the Core" 21.07: "Scope 3: Driving Decarbonization with and through Suppliers" The design uses a dark purple gradient with white text, indicating a professional, sustainability-focused webinar series.

How to Become a Member

01

Check if you qualify

Find out if you qualify for membership at no cost. Just fill out a quick 3-minute survey.

02

Meet With the Team

If eligible, you can book a 20-minute call with the team at the end of the qualification survey.

03

Decide & Confirm

Take your time to decide for a membership and discuss reimbursement with your employer.

04

Become a Member

Your yearly membership starts, once you’ll gain access to the TSC platform and community.

Membership Criteria

(Effective date 20.08.2025)

The TSC membership experience is designed for those who hold sustainability leadership roles within their organizations, dealing with complex challenges and making far-reaching decisions. We assess all invitees and applicants to ensure we can provide a valuable membership experience for them, as well as them being an asset for the other members in the network.

Recognizing that each situation is unique and may not be fully captured on paper, we evaluate each case individually, considering a range of factors to determine if membership is the right fit.
‍
These include:

  • Titles: The most commonly held titles among our members are CSO, Director of Sustainability, and Head of Sustainability.
  • Company size, based on the number of full-time employees.
  • Size of the team managed.
  • Professional journey and goals
  • Location: must be based in Europe
  • Diversity: Recognizing the challenges faced by women and individuals across the gender spectrum in sustainability, especially when compounded by race, gender identity and expression, sexual orientation, or disability, we are committed to fostering a diverse and inclusive environment.
To protect our community as a space for open sharing and meaningful exchange, we do not offer membership to individuals with clear commercial interests in our members. This includes representatives of consulting firms and vendors of sustainability services and software. Should you have any questions about the membership criteria or wish to provide additional context regarding your professional journey in sustainability, feel free to contact us at hey@tsc.earth.

Otherwise, the best course of action is to  apply directly for a chance to get a direct invitation from TSC.

What to Expect When You Join

TSC is a tight-knit and super personal community.
We make sure to tailor your membership experience to your individual needs so that you get the value you expect.

1

Join

Get a personal onboarding: One of our team members will walk you through the community, help you set up what matters most, and show you how to get real value from day one.
Attend meetups and introduction to the Circle: Say hello to the sustainability community in your city. These sessions are guided by local members and focused on real-time challenges. You’ll get a warm welcome from peers who’ve been in your shoes and start making your first meaningful connections.
Learn from peer Show & Tells: Hear how others tackled big projects, launched new strategies, or navigated tricky org dynamics.
2

Engage

Strategicly lead the change in your company. Bring your real-world challenges — strategy, budget, stakeholder engagement. The Circle helps you cut through complexity and make stronger decisions, faster.
Get Ad-hoc answers 24/7: Join exclusive channels just for Executive members — your go-to place for fast answers and deep support. You’ll also get access to the wider TSC community to see what’s trending across industries and roles.
Join (or build) a local chapter: We’re growing chapters in major cities. Want to meet in-person? You can join one — or start your own.
Build a career-defining network. Over the course of your yearly membership, you’ll build trusted relationships with senior sustainability leaders across industries. You’ll know exactly who to call when something big lands on your desk.