Thorne is governed by a Board of Trustees which makes policy level decisions that guide operations to ensure the fulfillment of Thorne’s mission. All of Thorne’s Trustees volunteer their time and contribute their talents in ways that best help Thorne connect youth to nature. 

Thorne’s programs are managed and implemented by an experienced staff of nonprofit professionals and environmental educators. Thorne maintains a small year-round staff and hires more than 30 seasonal instructors for its camp each summer. CLICK HERE if you are interested in joining the Thorne staff, and CLICK HERE to download Thorne’s organizational chart.

Dr. Oakleigh Thorne II / Founder, Honorary President, & Bird Banding Instructor
303.499.3647 x 104
[email protected]
Stephanie Brudwick / Administrative Director
303.499.3647 x 100
[email protected]

Stephanie joined the Thorne team in 2004 and has a B.A. in Environmental Studies from the University of Colorado at Boulder. Stephanie is the registrar for Thorne’s Summer Camp, manages the facility at the Sombrero Marsh Environmental Education Center, and provides administrative support. She is conversant in Spanish.

Keith Desrosiers / Executive Director
303.499.3647 x 105
[email protected]

Keith joined the Thorne team in 2010 and has a B.A. in Government from Skidmore College and a M.A. in Public Administration from the Rockefeller College. Keith has served as an Executive Director, Development Director or Nonprofit Consultant for Colorado environmental nonprofits since 1997. Keith has extensive knowledge and experience in the areas of strategic planning, fundraising, operational efficiency, and board development.

Alyson Duffey / Director of Development & Marketing
303.499.3647 x 108
[email protected]

Aly has a B.A. in Environmental Studies from SUNY at Buffalo and joined the Thorne team in January 2003 as an intern while studying for her M.A. in Environmental Leadership at Naropa University. Soon thereafter, she was hired as the Director of Thorne’s Summer Camp where she created many camps that are still offered by Thorne today. Aly served in various leadership capacities at Thorne through 2009 and then went on to work as Development Director for several Colorado environmental nonprofits. Aly returned to Thorne in 2016 with extensive knowledge and experience in the areas of special events, fundraising, and outreach.

Erica Fine / Program Manager - E Movement
303.499.3647 x 111
[email protected]

Erica joined Thorne in 2019 as the Program Manager for E Movement, a community-wide effort to advance the continuity, effectiveness, and access to environmental education in Boulder County. In addition to her county-funded work, Erica supports Thorne Summer Camp and School Programs as an Environmental Educator and assists with program marketing and development. She holds a master’s degree in Education from Harvard and a B.S. in Geology and Environmental Studies from Tufts University. Erica is passionate about collective impact and increasing equitable access to nature for all children and families, especially through nearby nature and green schoolyards.

Paul Humes / School Programs Manager
303.499.3647 x 109
[email protected]

Paul joined the Thorne team in 2018 as the School Programs Manager and educator. He received his B.A. in Elementary Education from Ball State University in Indiana. His classroom experience ranges from Indianapolis, Indiana to Liverpool, England, and rural Thailand with the Peace Corps. He was also an overnight summer camp counselor, managed and designed curriculum for a primitive skills academy, and trained in the 8 Shields mentoring model at the Art of Mentoring Vermont. Paul connects with nature by trail running, biking, backpacking, and practicing wonder & awe with the youth he mentors.

Andy Maeding / Education Programs Mentor
303.499.3647 x 107
[email protected]

Anthony “Andy” Maeding joined the Thorne team in 2016. He has a B.S. in Recreation Resources Management from Colorado State University and a Montessori Lower Elementary Teaching Credential from Montessori Education Center of the Rockies. Andy has extensive experience cultivating nature connection with children of all ages, having led students on extended wilderness expeditions, sea kayaking, snorkeling, scuba diving, backcountry skiing, fly fishing and international travel experiences for more than two decades.

Angela Myers / Program Director - Community Partnerships
303.499.3647 x 102
[email protected]

Angela joined the Thorne team in 2013 and has a B.A. in Geology from the University of Colorado at Boulder and an M.A. in Curriculum and Instruction from the University of Colorado at Denver. She has six years experience as a bilingual classroom teacher in the Denver Public Schools, infusing experiential learning into curriculum as her school’s Science leader. Angela also served as a Peace Corps environmental volunteer in Peru where she gained advanced proficiency in Spanish.

Lori Powell / Nature Preschool Director
303.499.3647 x 106
[email protected]

Lori joined the Thorne team in 2019 as the Nature Preschool Director. She holds a B.A. in Recreation Resource Management from the University of Georgia and obtained an M.A. in Education and an Early Childhood Education teaching license through the Teacher Education Program at the Boulder Journey School, where she taught for three years. She was most recently teaching Kindergarten Enrichment at Bear Creek Elementary, and has taught outdoor education for numerous organizations. Her passion for many years was leading outdoor expeditions as well as international travel, and then she shifted to working with younger children, which included teaching sign language and technology education. Lori is thrilled to be coming back to the outdoor classroom after several years of being indoors because she knows the incredible value of outdoor experiences for both children and adults. 


Carrie Riesberg / Summer Camp Manager
303.499.3647 x 110
[email protected]

Carrie Riesberg joined the Thorne team as a summer camp instructor in 2010, was hired as Summer Camp Coordinator in 2016 and now serves as the Summer Camp Manager. She has a B.S. in Business Administration and Entrepreneurship from the University of Colorado at Boulder and has extensive training and experience in special education and school-based mental health services, including eight years of experience as a behavioral specialist and paraeducator in elementary special education and as an after-school enrichment teacher.

Erin Saunders / Education Programs Director
303.499.3647 x 101
[email protected]

Erin joined the Thorne team in 2004 and has a B.S. in Zoology and Botany from the University of Washington. Erin has created curricula for many Thorne programs, written grants, and worked exhaustively with teachers, science coordinators, and district administrators as well as parents to ensure quality nature science programming for our community. Erin is a certified Project Wild facilitator and is conversant in Spanish.

Gwen Tenney / Program Manager - Field Trip & Volunteers
303.499.3647 x 103
[email protected]

Gwen joined the Thorne team in 2010 as a Summer Camp Instructor and has a M.S. in Ecology from the University of Toledo and a B.A. in Environmental Studies from Lake Forest College. Gwen has served as an educator, coordinator, and conservationist with organizations like the Butterfly Pavillion, the Len Foote Hike Inn, and Joshua Tree National Park. Gwen is a published author and certified Project Wild facilitator.

Maggie Vest / Environmental Educator
[email protected]

Maggie joined the Thorne team in 2012 through an internship and worked full time at Thorne as an AmeriCorps Member from 2014-2016. She has a B.A. in Environmental Studies and Ecology and Evolutionary Biology from the University of Colorado at Boulder, and a M.S. in Natural Science Education and Environment and Natural Resources from the University of Wyoming. Maggie’s passion is connecting students to their place. She has a wide range of experience from teaching students geology in the Tetons, investigating the scientific process with undergraduate students, to mentoring students on the amazing things they can find in their own backyards. She is passionate about the outdoors and on the weekends is likely to be found in the mountains backpacking.

Kara Wadenstierna / Lead Preschool Teacher
[email protected]

Kara joined the Thorne team in 2015 as a Summer Camp Instructor and has a B.A. in Elementary Education from Wheaton College. Kara brings to Thorne two years of primary teaching experience in Colorado’s Front Range, a year of educational non-profit work, and many summers working in and volunteering for Yellowstone and Rocky Mountain National Parks.


Thorne is governed by a Board of Trustees which makes policy level decisions that guide operations to ensure the fulfillment of Thorne’s mission. All of Thorne’s Trustees volunteer their time and contribute their talents in ways that best help Thorne connect youth to nature.

Thorne Board of Trustees

Amanda Paulson / Chair
Christian Science Monitor - Staff Writer
Susie Strife / Vice Chair
Boulder County - Sustainability Coordinator
Chad Arnold / Treasurer
Door To Door Organics - Board of Directors
Jenefer Donovan / Secretary
Thorne Parent and Community Volunteer
Brian Bagley
Bagley Law Firm - Attorney
David Brantz
Kottke & Brantz, LLC - Partner
Graham Casden
Oceans First Divers – Owner
Chris Jacobs
Element Properties - Principal
JD Mangat
Lafayette City Council
Jacquie McKenna
Development Finance Consultant
Anne-Worley Moelter
Movement Climbing & Fitness - CEO & Founder
Michael O’Toole
St. Vrain Valley Schools – Science Coordinator
Duane Primozich
Boulder Investment Group Reprise - Co-Founder and Managing Partner
Sophie Ramus
Centennial Middle School - Teacher
Jose Vietez
Boomtown Accelerator - Director
Randy Barber / Ex-Officio Trustee
Boulder Valley School District - Chief Communications Officer
Mark Davison / Ex-Officio Trustee
City of Boulder Open Space - Community Connections and Partnerships Manager
Covid-19 Updates from Thorne Read More