Vision-driven consulting for lasting impact.
Your strategic ally for sustainability and impact strategy, reporting and storytelling.
Who We Are
Calluna Advisory LLC is a vision-driven consulting firm that partners with companies to advance sustainability, ESG and impact goals. We understand the pressures and opportunities leaders face today - from navigating regulatory shifts to meeting evolving stakeholder expectations - and bring sharp insights and real-world pragmatism to every engagement.
Calluna Advisory LLC is founded by Leah Harris, a seasoned strategist and advisor, who brings more than a decade of experience working with Fortune 500 companies, global brands and nonprofits to define, deepen and communicate their sustainability efforts.
Our Services
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Enterprise Sustainability Strategy & Materiality
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ESG Data, Reporting & Regulation Readiness
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Social Impact & Corporate Giving Strategy
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Impact & Sustainability Storytelling
“Leah always took the time to communicate with consideration and clarity throughout our partnership, and made me feel heard and supported...[her] ability to think strategically while being flexible was a core element of making our partnership smooth and effective.”
— JOCELYN N., POINTS OF LIGHT
“Leah has always been a strategic leader in the ESG space, but more importantly she cares about her work and she cares about the people she works with. Any team she is on is lucky to have her.”
— SERGIO G., MICROSOFT