Board & Staff




In Tribute

alvaro ugalde

Álvaro Ugalde

The late Álvaro Ugalde, founder of the National Park Service in Costa Rica, was a pioneer in the field of land conservation and an inspiration to all who knew him. As a biologist and world-renowned conservationist, Álvaro’s work helped transform Costa Rica. His vision and passion for the Osa Peninsula were contagious and he continued to fight for the Osa and Corcovado National Park until his last day.

His tenure on the board of Osa Conservation made us a better organization and we are forever grateful for his leadership and his contribution to us and to the world.

Osa Conservation, with the support of the blue moon fund, has created two funds to honor the memory of Alvaro and to continue his life’s work. The Álvaro Ugalde Scholarship Fund will provide small grants to young people studying and working in the field of conservation. The Campaign for Corcovado will support efforts to strengthen Corcovado National Park and remove illegal gold miners threatening the integrity of the park.


To read a touching tribute from Adrian Forsyth click here: English / Spanish

Board and Staff Leadership


Adrian Forsyth

 Chairman | Adrian Forsyth, PhD

 Founder of Osa Conservation and the Amazon Conservation Association, Adrian is currently Executive Director of the Andes Amazon Fund. In addition to extensive fieldwork, teaching and  a lifetime of conservation work, Adrian is one of North America’s finest natural history writers and the author of nine books, including Tropical Nature, The Nature of Birds, Exploring the World of Insects, and Portraits of the Rainforest.

Liliana.Madrigal President | Liliana Madrigal

 A veteran conservationist and social entrepreneur, Liliana is co-founder of the Amazon Conservation  (ACT) and currently serves as their Director of Program Operations. Early in her career, Liliana served as Director of the Costa Rica Program at The Nature Conservancy, where she helped to consolidate existing protected areas throughout Costa Rica and to create new ones. Liliana also helped found Conservation International in 1987, and served as their Director of the Southern Central America Program.

Bill AbrahamsTreasurer | Bill Abraham

President and founder of Osa Pacific Partners, a consulting and private equity company, Bill worked for Intel Corporation for 25 years in various management positions, including four years as General Manager of Intel Costa Rica, managing the entire Intel Costa Rica site.

Photo Federico CastroSecretary | Federico Castro Kahle, MBA

A partner at Caoba Legal, Federico specializes in environmental law and public-private partnerships. Federico earned his MBA from Imperial College in London, where he developed his expertise in carbon forestry and climate change mitigation mechanisms. Throughout his life Federico has been involved in conservation endeavors in the Osa Peninsula; nowadays he is part of a family-owned organization that protects over 2500 acres of primary forest in the area through private preserves.


 Member-at-large | Craig Thompson

A lifelong conservationist, Craig Thompson has worked for the Wisconsin Department of Natural Resources for almost 30 years. He also holds Adjunct Faculty appointments in the biology departments of two universities in La Crosse, Wisconsin. Craig is active in the national and international conservation communities and keenly interested in working with birders to advance conservation across the Americas. He also has an inordinate fondness for cheese. 

will-nesbittMember-at-large | Will Nesbitt

President of Riverside Advisors, Will has 30 years of principal investing, corporate development and advisory experience across a wide range of industries.  Since 2007, he has served as a senior executive, investor, board member and advisor within the renewable energy and environmental opportunities sector.  He is also a pole vault coach at the Hudson Valley Flying Circus and a Masters level competitor.

img_1610Member-at-large | Rodolfo Trejos

Director, Corporate Banking, Scotiabank. With a successful career in banking, corporate finance, credit risk and credit structure, Rodolfo has vast entrepreneurship experience in the food & beverages sector as the co-founder and Manager of a successful company in the mid-nineties. More recently he ventured into an apparel business that’s oriented towards the wholesaling of accessible and high-quality garments. He joined Osa Conservation in 2017.

Advisory Council

Claudia Alderman
Manuel Alonso
Martinez Fabrice
Garnier Ca
Theo Gund
Anna Maria Oduber 
Jeff Woodman

Osa Conservation Staff


Hilary Brumberg | Healthy Watersheds Coordinator







Juan Carlos Cruz Díaz | Feline Program Coordinator


Luis Carlos | Mangrove Restoration Coordinator







Mónica Espinoza Miralles | Marine Conservation Scientist


Eleanor Flatt | Restoration & Rewilding Assistant







Karla Funes | Conservation Experience Manager






Noelia Hernandez | Marine Programs Coordinator







Marco Hidalgo | Coordinator for Prevention of Ecosystem Collapse








Melinda Housholder| Grants and Outreach Associate, Washington DC


Marvin Lopez | Botanics Assistant







Renee McKeon | Co-Executive Director







Agustín Mendoza | Land Stewardship and Maintenance

Agustín Mendoza





Michelle Monge | Restoration & Rewilding Coordinator







Ruthmery Pillco Huarcaya | Biodiversity and Conservation Projects Coordinator and Botanical Assistant







Manuel Sánchez | Research Assistant and Sea Turtle Program Coordinator







Eduardo Vargas | Conservation Experience Assistant 








Lucia Vargas Araya | Conservation Experience Coordinator


Dennis Vásquez | Puerto Jiménez Administration Manager

Dennis Vásquez





Max Villalobos | Co-Executive Director, Costa Rica 







Dr. Andrew Whitworth | Director of Ecological Restoration and Biodiversity Conservation







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