Our Team

Tammy Newmark

A leader in impact investing, This email address is being protected from spambots. You need JavaScript enabled to view it. has over thirty years of experience in the field. Newmark launched EcoEnterprises Partners II, LP in 2012 under EcoEnterprises Capital Management, LLC in which she is a partner. She served as President of Fondo EcoEmpresas, S.A., EcoEnterprises Fund’s first fund under management, for The Nature Conservancy from 1998 to 2010. Newmark directed Technoserve, Inc.’s environmental business advisory services in Latin America and Africa. Prior to that, she was a founding officer of Environmental Enterprises Assistance Fund, the first venture fund that specialized in renewable energy, clean technology, and green investments in emerging markets. She established investment groups: Yayasan Bina Usaha Lingkungan and Preferred Energy Investments in Indonesia and the Philippines, respectively. She has also worked for the International Finance Corporation and JPMorgan Chase. Newmark is co-author of Portfolio for the Planet: Lessons from 10 years of impact investing, (Earthscan/Routledge Press, 2011).  Newmark has an MBA from the Wharton School of the University of Pennsylvania.

MIchele Pena

This email address is being protected from spambots. You need JavaScript enabled to view it. has been part of the EcoEnterprises Fund’s senior team since 2001, managing all operational, business development and monitoring and evaluation functions. She now serves as Chief Operating Officer. Pena launched EcoEnterprises Partners II, LP in 2012 under EcoEnterprises Capital Management, LLC in which she is a partner. Pena brought organizational and marketing expertise to EcoEnterprises Fund from her position as Program Director at the Climate Institute, a nonprofit organization focused on global climate change issues. Pena is co-author of Portfolio for the Planet: Lessons from 10 years of impact investing, (Earthscan/Routledge Press, 2011). She has an MA from American University in Washington, D.C.

Oksana Aguilar

With over seventeen years’ experience, This email address is being protected from spambots. You need JavaScript enabled to view it. has served in various financial management functions. For five years, she served as Investment Monitoring Officer for Fondo EcoEmpresas, S.A., EcoEnterprises Fund’s first fund under management and rejoined the team in 2012 to serve as Financial Controller for EcoEnterprises Partners II, LP. Prior to this present position, she was Finance and Administration Director for World Wildlife Fund’s Central America Program Office in Costa Rica. She also held the position of Finance Specialist at The Nature Conservancy and worked in the comptroller’s office in IUCN’s Mesoamerican Office.  Aguilar holds an MBA with emphasis in banking and finance from the University of Costa Rica.

John McKenna

This email address is being protected from spambots. You need JavaScript enabled to view it. brings nineteen years’ experience in both private equity and the technology industry, the majority focused on the emerging markets of Latin America, Africa and Asia. He has worked extensively as an advisor to corporate executives and Boards of Directors on strategic issues. His functional expertise includes new business development, mergers and acquisitions, corporate restructurings and turn-around management. Most recently John worked as an executive in the Private Equity group of Fidelity Investments, covering a wide-range of industries. He has an MBA from the University of South Carolina.

Nathalie Prado

This email address is being protected from spambots. You need JavaScript enabled to view it. has been on EcoEnterprises Fund’s investment team for twelve years. She served as a monitoring officer for Fondo EcoEmpresas, S.A., EcoEnterprises Fund’s first fund under management carrying out post-investment field visits, gathering portfolio impact metrics and managing several deal workouts and exits. She rejoined in her present capacity for EcoEnterprises Partners II, LP after several years at Root Capital, where she was a loan officer for Central America, leading investment activities in Nicaragua, Dominican Republic and Haiti. She holds an MBA in Sustainable Business from Universidad para la Cooperacion International in Costa Rica.

Nathalie Prado

This email address is being protected from spambots. You need JavaScript enabled to view it. has twelve years of experience in corporate and competitive strategy, mergers and acquisitions, strategic risk analyses, and sustainability. Prior to joining the Fund, she worked as a project leader for the Boston Consulting Group in Europe, the US and Asia, where she was part of the Corporate Development task force, facilitating strategic decision making and supporting clients during due diligence to post-merger integration. She also worked on sustainability and social impact assignments with European corporations, NGOs and foundations. She holds an MA in International relations, economics and business administration from the University of Passau in Germany with a specialization on Latin America economies.

Anna Schaefer

Anna Schaefer, Investment Officer, brings investment analysis, portfolio monitoring, and market research experience to the team. Prior to joining EcoEnterprises Fund, she worked in Nicaragua as a loan analyst and Latin America Regional Representative for a microfinance fund. In this capacity, she performed in-country due diligence visits, and trained country representatives for microfinance institutions. She holds a BA in Business from the University of Wisconsin - Madison.

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