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  • OUR MISSION

    Training sustainability leaders for tomorrow by creating sustainability solutions for today.



Gnarly Tree Sustainability Institute (GTSI) is a small, woman-owned, certified B-corporation based in Bloomington, Indiana. We specialize in building organizations’ capacity to address their social, environmental, and economic impacts; making sustainability resources go further from the start; and preparing sustainability students to become sustainability leaders.  

We do so by teaming consultants and NGOs with talented university faculty, researchers, and students. These experienced teams integrate policy and management theory with lessons from real-world experience and best practices to provide cost-effective, creative, and collaborative solutions.

GTSI’s unique approach to engaging faculty and students on applied projects enables us to fulfill our mission of training sustainability leaders for tomorrow by creating sustainability solutions for today.

Solutions to the world’s most complex sustainability problems.

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The “Gnarly Tree” company name holds numerous special meanings for its founders. The company works alongside its clients to solve complex and challenging, some might say “gnarly” problems. Associates often find it useful to employ the use of decision “trees” in the development of appropriate management strategies. Trees also have symbolic meaning across various cultures, often used to represent strength, security, friendship, protection, wisdom, creation, and resilience in the face of adversity.