Wyoming Chapter Staff


Rob Joyce 2024

Rob Joyce - Acting Director

Laramie, WY


I moved to Wyoming in 2007 to attend the University of Wyoming and have been a conservation and climate activist ever since. I began working for the Sierra Club in 2018 as a conservation organizer and transitioned into a role with Sierra Club's Beyond Coal Campaign in 2020. In my current position as acting chapter director, I work with our staff, volunteers, and board to grow our movement to protect our undeveloped landscapes, healthy wildlife, clean air and water, and our climate.




Kaycee Prevedel 2024

Kaycee Prevedel - Conservation Organizer

Laramie, WY


I’ve been an organizer for Sierra Club Wyoming since 2021. My background is in archaeology and my higher education focused on Indigenous land rights. I am an organizer and the volunteer coordinator and have met like-minded advocates and friends through the Sierra Club. My work focuses on public lands and wildlife issues. I am currently working on the Red Desert Protection campaign and our Healthy Wildlife Initiative, which includes advocating for migration corridors and protection of large carnivores. I have a young son and am dedicated to working protect intact ecosystems and ensure a livable planet and just society for all.


Conor Mullen 2024

Conor Mullen - Conservation Organizer

Laramie, WY


I'm an artist, an educator, and an organizer who uses creativity and community gatherings to promote equitable and ecologically stable futures. I started working as a conservation organizer for Sierra Club Wyoming in 2021 and my work focuses on climate, energy, and environmental policy. I was born and raised in Casper, but I currently live in Laramie where I like to keep my dog, sketchbooks, and a skateboard close by. 





Kelsey Yarzab 2024

Kelsey Yarzab - Associate Organizer

Jackson, WY


I grew up in rural New Jersey and obtained my BA in International Affairs & Sustainability from George Washington University. My passion for local activism and grassroots organizing led me to the 2020 cohort of the Conservation Leadership Institute at the Jackson Hole Conservation Alliance, where I learned how to turn my passion into action. I'm thrilled to be part of a passionate group of change-makers at Sierra Club Wyoming who are dedicated to protecting the integrity of the Greater Yellowstone Ecosystem and beyond.