Amielle DeWan, PhD
Founder and
Executive Director

Aligning work towards the greatest possible impact can be a challenge but I love working with organizations and diverse teams to overcome problems and untangle complexity. Understanding needs and delivering the right tools and processes for teams to reach their goals is a real passion.  I am inspired when we have helped people develop the skills and confidence to measure, evaluate, and improve on their work so they can make a powerful impact on the world.

My perspective and expertise has been shaped by over 20 years of experience in designing monitoring, evaluation, and learning systems for multiple national and international nonprofits and government agencies.  I’ve worked with communities and organizations in Indonesia and China, across Europe, Africa, South and Central America, and the United States.  I received my PhD from Cornell University in wildlife ecology, biostatistics, and GIS, an MS from the State University of New York in Conservation Biology and Policy, and BA in Biology from the State University of New York Binghamton.

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Hanna Lentz-Harry, MBA
Founder and
Managing Director

I am passionate about creating conditions that allow leaders and teams to succeed. This means developing solutions that are innovative, practical, and getting at the root problems. I share a commitment to mission with my clients, and bring the experience and skills to tackle even the toughest organizational challenges. 

My specialties come from years of working both in the field and organization management, including expertise in strategic and operational planning, organization development, training design, and convening stakeholders for collaboration and impact. With extensive international experience I've worked with organizations in the United States, Canada, Mexico, Chile, Indonesia, South Africa, and across Europe. I hold an MBA from IE University in Spain in Global Business Administration, an MS from Tufts University in Animals and Public Policy, and a BA with Honors from University of Michigan in English and Writing.

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Ellie Milano                   Associate, Learning and Impact


I am excited about discovering the factors that lead to real, measurable impact for teams on the ground, and the conditions that create effective and healthy organizations. I explore the processes that make project teams successful in achieving their goals, and how to identify and reduce barriers to success. My expertise in strategic and project planning is rooted in the realities of what really works for teams. I design meetings and workshops with that in mind – helping teams to create the best possible solutions for their work.

My diverse experiences have afforded me a multidisciplinary approach to problem-solving, rooted in the real-world challenges that face small and large non-profits. I have supported the development and management of projects across the globe including Bosnia & Herzegovina, Mexico, Indonesia, South Africa, and Europe. I hold an MSc from Tufts University in Conservation Medicine, a BS in Biology and a BA in Environmental Studies both from Hobart and William Smith Colleges.

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Moji Igun Business Operations Coordinator

I have a strong dedication to improving the world we live in and I'm lucky to work with organizations who share the same values. I'm excited to utilize my problem-solving skills to support innovative organizations by ensuring our internal team is consistently set up for success.

My experiences range from improving student outcomes through an education non-profit to quality management in the commercial construction industry. My unique combination of experiences has taught me how to efficiently break down just about any overwhelming project into manageable steps and collaborate with individuals and teams to achieve multi-disciplinary goals. I hold a BS from University of Michigan in Mechanical Engineering and a certificate in Sustainable Business from University of Washington Tacoma.

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Lauren Watkins Director, Behavior Change Strategies

Understanding how human behavior influences our natural world is a passion of mine. I get excited by opportunities to merge behavior change science with practice, helping others to reach their goals for animals and the environment. I share a desire with our partners to positively influence natural resources by helping people act in the best interest of the environment. To achieve this, I work closely with teams and organizations to build their capacity to foster sustainable behavior change.

My diverse experience in conservation psychology, communication, interpretation, and education comes from more than a decade of work with zoos, aquariums, museums, parks, reserves, and nonprofits in the US and abroad. I am a Ph.D. Candidate at the University of Florida’s School of Forest Resources and Conservation, and hold an MS from the University of Illinois Urbana-Champaign in Natural Resource Management and Environmental Science,  as well as a BA from Flagler College in Psychology with a minor in Sociology.

Board of Trustees


Ariela Rosenstein

Learning Strategist; Independent Consultant

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Errol Mazursky

Executive Director; Environmental Leadership Program

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Ravi Prasad

Associate Director; CSpace

Ariela’s work spans the health, education, and environmental sectors, and she currently advises on management and leadership development for a global humanitarian agency.  She has a particular passion for designing and guiding experiences that unite and empower diverse stakeholders to address complex challenges.  As Vice President of Training at Rare, Ariela oversaw the global product line for behavior change communications and training solutions. She built networks of learning communities, and activated an organizational culture of participation, engagement, and alignment across languages, cultures, and contexts.  Ariela has over 20 years of experience in leading education and capacity building programs for global non-profits throughout North America, Asia, Latin America and Africa. 


As Executive Director of the Environmental Leadership Program, Errol manages the day-to-day operations of the organization in addition to the recruitment and selection process of ELP’s regional networks, oversees the development and planning of fellowship programming, and maintains ELP’s national network of 1,000+ Senior Fellows. He believes in the power of knocking down silos and continuously requesting (and using!) feedback for growth.  An innate networking expert and optimist, he has a deep understanding of the challenges facing organizations and the opportunity for impact that comes from empowering individuals to succeed.  Errol has also worked at the U.S. Environmental Protection Agency, served in the U.S. Peace Corps as a health volunteer in The Gambia, West Africa, and as a Crisis Corps Volunteer in New Orleans, LA.


Ravi Prasad is an educator-turned-consultant who uses his moderation, design-thinking, and research skills to help corporations and non-profits alike. His professional interests are driven by a desire to help drive deeper connections between people, communities, and corporations to drive sustainability, equity, and profit. He has worked with a wide variety of organizations from Bose to Brown University, Coca Cola to the Environmental Leadership Program, Mass General Hospital to the City of Boston, and is thrilled to support Impact By Design.