

Paso Pacífico’s early successes are a result of the hard work of its dedicated staff, its active Board of Directors, and numerous scientists, professionals, and interns that volunteer their time. Together, we are working towards realizing our dream of creating viable wildlife corridors along the Pacific Coast of Central America.
* Staff in the US
* Staff in Nicaragua
* Associated Scientists and Professionals
* Interns
![]() |
Executive Director - Sarah Otterstrom, PhDSarah is an ecologist with over 17 years experience in Central America where she has lived and worked as a student, scientist, and leader in biodiversity conservation. After learning first-hand of the unique beauty of tropical dry forests and pacific coast habitats, she became determined to dedicate her life to protecting them. Otterstrom received a Ph.D. in Ecology, in the area of emphasis of Human Ecology, from UC Davis. Her scientific research has focused on the ecological impacts of fires in tropical forests and the cultural practices that influence tropical fire regimes. As a conservation scientist she serves on the Editorial Board of the Journal of Biotropica. She has also served on the Association for Fire Ecology and the Sociedad Mesoamericana para la Biología y Conservación. |
![]() |
Director of Conservation Science – Kim Williams-Guillén, PhD |
![]() |
Programs Assistant - Melissa Furlong
Melissa is a devoted tree hugger passionate about writing and wildlife. She earned a BA beneath towering redwoods at UC Santa Cruz in Community Studies, with emphases on agriculture, international development, and social justice. As part of her degree program, she participated in a field study with Action Against Hunger in New York as an external relations specialist. She then moved on to work with numerous non-profits in a variety of fields, but decided to get back to her conservationist roots by joining Paso Pacifico’s team. |
|
Administrative Assistant – Nicole Salazar Nicole started at Paso Pacifico in 2010 as an administrator at the US office. Nicole's experience and degree in sociology and business management has helped her to adapt her skill set to the needs of Paso Pacifico. Working here has been a good fit because helping and teaching has been a consistent part of her work, from working as an English teacher in Taiwan to teaching people healthy living at Weight Watchers. As an amateur photographer, her favorite subject has always been nature. As an observer and lover of nature, she has enjoyed working with Paso Pacifico by providing administrative and accounting support to further their causes. |
|
|
Country Director – Liza González, MScLiza has been a leading conservationist in Nicaragua for over a decade. As an ecologist trained at the Universidad Centroamericana in Managua, she has worked in varying capacities for non-governmental organizations, on community-based conservation projects and in leadership positions within the Nicaraguan ministry of the environment. In recent years she was director of the National Protected Areas System, overseeing the management of 76 protected areas and also served as the Director of the Biodiversity Program, an agency charged with evaluating and protecting the nation’s biodiversity. Most recently, González served as a consultant to the Mesoamerican Biological Corridor project developing strategies for corridor implementation. |
|
|
Environmental Education – Julie MartínezJulie leads our environmental education program, sharing the wonders of our natural world with children at six different schools across the Paso del Istmo. She studied biology at the Universidad Nacional de Nicaragua in Managua. Since joining Paso Pacifico in 2006, Julie has been instrumental in organizing many community workshops and school events. She especially enjoys helping students to gain hands-on learning in the forests and beaches in their neighborhood. |
|
|
Forest Ecologist - Claudia Nohemi Perla Medrano
Claudia Nohemy is a forest ecologist who recently graduated from Universidad Nacional Agraria in forestry. Claudia’s college thesis focused on the seasonally dry tropical forest vegetation located at the Escameca Grande Private Reserve located in the Paso del Istmo. Claudia is from the northern Nicaragua province of Matagalpa where she has also carried out forestry management plans in that regions native pine forests. Currently, Claudia works for the Paso Pacifico tending to the hundreds of thousands of trees in the Return to Forest Project. Claudia is passionate about protecting and restoring the native forests of her homeland. |
|
|
Conservation Scientist – Martín Lezama, MScnicapinol2002@yahoo.com |
|
Turtle Program Coordinator - Salvador Sanchez |
|
|
Nonprofit Management and Development – Christine Schmidt, MNA christine@pasopacifico.org Christine has combined her knowledge of non-profit organizations and her passion for wildlife and river conservation to support the creation and development of Paso Pacífico from the start. Christine has a master’s degree in non-profit management from the University of San Francisco. She currently works as a development officer for the College of Agriculture and Environmental Sciences at UC Davis. However, she makes time during the weekends to contribute to our common dream of building a wildlife corridor. Christine is also a talented nature photographer. |
|
Communications and Outreach - Wendy Purnell |
|
![]() |
Conservation Scientist – Stephanie Spehar, Ph.D. |
|
|
Conservation Scientist – Suzanne Hagell, PhD |
Wildlife Management Advisor - Cortney VargasCortney began working for Paso Pacifico in 2008 as the Program Administrator, managing the US headquarters and keeping staff well-equipped. Cortney left a significant and lasting legacy at Paso Pacífico by designing the Karen Warren and Susan White Spider Monkey Sanctuary and Education Center located at Domitila Reserve, Nicaragua. Cortney continues to act as an advisor for the sanctuary as she finishes a degree in Wildlife Conservation at Humboldt State University. Cortney has degrees in Wildlife Education, Animal Behavior Management, and Exotic Animal Training and Management.
|
|
![]() |
Program Development - Teresa Lang teresa@pasopacifico.org |
|
Danny Merien
Danny is a Dutch student pursuing a Bachelor degree who has always had a passion for cold-blooded forest animals. He is studying Animal Management, with a major in Wildlife Management at the Van Hall University in the Netherlands. In September 2009, Danny joined the Paso Pacifico team and is currently on a project monitoring reptile and amphibian species in different areas of the Paso del Istmo. |
| |
Robert Euwe Robert is a 22 year old Wildlife Studies student at Van Hall University in the Netherlands. He is passionate about large carnivores and currently is specializing in big cats. His experience with these cats involves projects about leopards and South African lions. In Robert’s current internship with Paso Pacifico in the south of Nicaragua, he is working on a jaguar and puma project. In this project, he is attempting to assess the presence of (and the possibilities for) these big cats. Through this project, he works to contribute to the future of big cats in Nicaragua. After this 6 month project, he will start his final thesis, and after graduating he will continue on to study ecology. |
![]() |
Daniel Sullivan Daniel graduated from Point Loma Nazarene University in 2009 with a Bachelors of Science degree in Molecular/Cellular biology. Due to his love of the outdoors, Daniel chose to forgo the typical lab research positions and opted for ecological research with Dr. Michael Mooring who was studying American Bison in the San Hills of northern Nebraska. During his two summers spent at the Fort Niobrara Wildlife Refuge in Valentine, Nebraska, Daniel worked under the US Fish & Wildlife Service, working exclusively in the field with a collection of undergraduate and PhD students. He was made the lead undergrad researcher and chosen to present the groups findings at the West Coast Biological Conference in 2007 and 2008. After his university research concluded, Daniel accepted a congressionally appointed internship in Washington DC. On Capitol Hill, he and his congressional staff worked closely with the Natural Resource and Foreign Affairs committees—introducing new bills and acquiring co-sponsorship. Upon graduation, Daniel volunteered at various health clinics and hospitals in Eastern Africa. Since then, he has begun working as the marketing account director at the Continental Exhibit Group, while also working with Paso Pacifico as a policy writing intern |
| |
Anna Guasco Anna Guasco is a Senior in high school from Ventura, California. She first heard of Paso Pacifico when Director Sarah Otterstrom spoke to her Sophomore chemistry class in 2010. Immediately entranced, Anna contacted Paso Pacifico and eventually started an internship working on a website project and writing. As a college-bound student, Anna is interested in exploring the field of environmental studies, and participated in U.C. Santa Barbara’s “School for Scientific Thought” program and U.C. Santa Cruz's COMOS summer science program. She recently founded "Ventura Eco-Renewal,' a student organization working to establish native plant gardens and to promote sustainability in the Ventura community. |