The Mosaics Team

Sheylda Diaz-Mendez PhD, Environment for the Americas


¡Hola! Welcome to the Mosaics in Science Internship Program! I am the Mosaics in Science Coordinator for Environment For The Americas. I am originally from Puerto Rico but I was raised between military bases in Germany, the US and the Caribbean. My special upbringing shaped my appreciation and my love for the differences in cultures and people.


I have an Animal Science certification from the University of Puerto Rico in Mayaguez, a BS in Biology from the University of Central Florida, and a MS in Environmental Science from Ana G. Mendez University. I also obtained my PhD in Environmental Resource and Management from Ana G. Mendez University, where I have been a lecturer in the Department of Natural Science and Technology since 2006.


In addition to assisting with coordination of the Mosaics in Science internship program, I also coordinate World Migratory Bird Day in the Caribbean region. My favorite pastime is birdwatching, especially shorebirds! My true vocation is education. That is why I strive to achieve opportunities for diverse youth and provide inclusive and diverse professional and academic environments. I offer my experience with underrepresented students and years of involvement to enhance engagement of diverse talent to this wonderful program. I hope you have a learning experience full of wonder and fun this summer!

Griselda Landa-Posas, Environment for the Americas


¡Hola! I am an Assistant Internship Coordinator here at Environment for the Americas. Aside of helping with the Mosaics in Science internship program I also help with all the other diversity internship programs, that Environment for the Americas organizes in partnership with federal agencies and other non-profits.


In 2019 I graduated from Colorado State University with a B.S. in Wildlife & Conservation Biology, and a minor in Ethnic Studies. I am also a former, 2-time, Mosaics in Science in intern. In 2016 acoustic ecology technician in Denali National Park, up in Alaska, and in 2017 I was a biological field technician in Everglades National Park.

I was born in Colorado and raised here but my parents originate from rural Southwest Mexico and I spent a lot of my youth exploring the outdoors in Mexico with my grandparents. From a young age my parents shared their appreciation of wide open spaces with me, and their love of the land.


I have always been passionate about diversity, community-building, environmental justice, and conservation. My degrees in Ethnic Studies and Wildlife & Conservation Biology allowed me to combine my passions and I love that my role in Environment for the Americas allows me to do the same. I am able to help youth, like myself, who come from underserved communities and combine that with my passion for sustainability and conservation.


When I’m not in the office you can find me rock-climbing, backpacking, camping, swimming, bicycling or reading a novel on a hammock!

Shanelle Thevarajah, Environment for the Americas


Hi I’m Shanelle! I am an Assistant Internship Coordinator here at Environment for the Americas.


I earned my B.A.S. from the University of Guelph in Ontario, Canada in 2019. I studied Zoology and Family & Child Studies because of my passion for scientific communication and involving communities in conservation-related decisions. In May 2021, I earned my M.S. in Environmental Biology. My research mainly focused on the social behavior of male Asian elephants at Denver Zoo, and I loved getting to learn more about such incredible animals! In addition, I have also done a lot of work with invertebrates. I recently finished up an internship at the Butterfly Pavilion, where I worked on a long-term citizen science butterfly monitoring program.


I am excited to be working with the diversity internship programs because I understand how important it is to have the opportunity to get involved in research and field work you are passionate about.


In my free time, I love to explore new places with my dog, try out new recipes, and watercolor!



Kiersten Jarvis, National Park Service


Welcome! I am the National Park Service (NPS) Program Manager for Scientists in Parks and Mosaics in Science. 


I graduated from the University of Illinois with a Master’s degree in environmental policy and a Bachelor’s degree in Natural Resources Management from Colorado State University. Over the last 8 years of my NPS career, I have worked in various parks and offices on citizen science projects and youth engagement programs. I am passionate about connecting people to the natural world and sharing how to get involved with conservation efforts in your national parks.


When not working, you will find me in my pollinator garden or exploring new parks.