Fractional Sustainability Leaders Collective

A collective of seasoned sustainability leaders – ready to integrate, execute, and lead.

Our Mission

The FSLC elevates fractional sustainability leadership as a trusted, business-driven approach to sustainability.

We strive to:

  • Champion fractional sustainability leadership as a strategic, results-driven profession.

  • Be the trusted hub where businesses find sustainability leaders to drive immediate and long-term impact.

  • Define excellence in the field of fractional leadership.

  • Foster a high-caliber, supportive, community for sustainability executives.

The fractional model gives businesses new ways to integrate sustainability leadership.

What is a Fractional Sustainability Leader?

A Fractional Sustainability Leader (FSL) brings senior-level sustainability expertise to companies that need strategic leadership—without the commitment of a full-time hire. With executive-level accountability, an FSL embeds within a company and rolls up their sleeves to develop and implement sustainability strategies, engage leadership teams, and drive real impact—all while working in a part-time yet high-impact capacity.

What Defines an FSL?

  • Deep sustainability expertise—previously led sustainability at a senior level.

  • Executive leadership experience—trusted by C-suite teams to align sustainability with business goals.

  • Hands-on strategic partner—more than a consultant, an FSL embeds within a company to implement solutions and create lasting change.

How They Work

  • Senior-level leadership and accountabilities, fractional engagement—works part-time but acts full-time.

  • Collaborates across teams—engages executives, directs staff, and leads key initiatives.

  • Leads with action—fully invested in the work, handling both strategy and execution.

  • Long-term impact—typically works under an extended contract to build sustainable progress.

Some call it a Fractional Chief Sustainability Officer (CSO), but Fractional Sustainability Leader is an important distinction to our collective. Not all companies need a C-suite hire—but every company can benefit from senior-level sustainability leadership that drives real results.

How do I find and engage a Fractional Sustainability Leader?

  • 1) Explore Our Members

    Browse the FSLC member directory to find seasoned, peer-vetted sustainability leaders with expertise that matches your industry, challenges, and goals.

  • 2) Reach Out Directly

    Contact members individually to discuss your needs, or connect with FSLC for guidance.

  • 3) Define Your Needs

    Initial conversations will focus on your company’s sustainability priorities, pain points, and leadership gaps, ensuring the right fractional model for your needs.

  • 4) Engage & Get Started

    Once you’ve identified the right FSL, you’ll define engagement terms, leadership scope, and integration steps—with a focus on impact from day one.