
People With a Purpose
We’re driven to create positive change for companies, communities and the environment.
We’re an experienced team of sustainability strategists, analysts, and reporting and communication experts.
Our multidisciplinary team of experts creates forward-thinking sustainability strategies, programs and communications for clients in a broad range of industries. SustainabilityNext is a woman-owned business led by Ann Tartre, a seasoned sustainability practitioner who has advised organizations on all aspects of sustainability strategy, program development and ESG reporting for more than 20 years.

How we work
Collaborative & Hands On
Think of us as an extension of your team. We partner with you, working side-by-side to dig into the task at hand.
Committed to the Long Term
Our goal is to help you effectively navigate every stage of your sustainability journey, no matter where you are in the process.
Responsive to Your Needs
We bring a balance of industry best practices together with processes that are tailored to your business and culture.
Our Core team
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Ann Tartre
CEO & Principal Consultant
A seasoned leader, Ann brings expertise in corporate responsibility, stakeholder engagement, and social justice issues to the practice, as well as natural resource issues such as energy, climate and water. Ann holds GRI and CDP certifications and an FSA level 1 (SASB) credential.
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Lena Muntemba
Sustainability Analyst
With a broad range of sustainability and ESG subject matter expertise, Lena provides industry research, benchmarking, data analysis and project management support on many of our client engagements. Lena is GRI Certified.
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Mallory Murphy
Project/Client Relationship Manager
Mallory has more than a decade of experience of leading, managing and collaborating with client and project teams, making sure that projects go off without a hitch and clients are informed at every step.
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Michael Fisher
Writer & Editor
Michael specializes in helping purpose-driven brands show the world what they stand for. His experience spans a variety of ESG, sustainability and CSR communications, including annual reports.
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Pamela Fiehn
Brand & Content Strategist
Pamela is a communications professional and brand builder who has been working in the field of sustainability and social impact for more than 15 years. Pamela is GRI certified.
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Rivers Janssen
Writer & Editor
Rivers has more than 15 years of experience specializing in strategic, story-driven writing and editing for sustainability and ESG reports and communications. Rivers is GRI certified.
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Tyler Wagner
Brand Strategist & ESG Advisor
Tyler is a 15-year veteran in the brand purpose space, with extensive experience in corporate sustainability/ESG strategy and reporting. He is GRI and TCFD certified.
Our partners
We’re fortunate to partner with a number of ESG consultancies and communications agencies on annual reporting and other strategic sustainability projects.
Our community
We proudly support several nonprofit organizations that make a positive impact in our local community and around the world.
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Assist Ukraine is a grassroots initiative that provides medical supplies, protective gear and humanitarian relief to Ukrainians.
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The Maine Island Trail Association is a membership organization dedicated to the protection and enjoyment of the wild islands of coastal Maine.
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Project Launch is an education-based nonprofit that helps students in the state of Maine make a successful transition from high school to meaningful post-secondary learning and opportunities.
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Our Climate Common builds relationships of trust throughout our society so we can get important things done, together, on the ground.