Staff Bios

Diane Poslosky, Executive Director (, ext.17)
Diane Poslosky has served as ETC's Executive Director for 30 years. Diane has taught environmental education for three decades, was an elementary school teacher, and supervised conservation work and education for high school students. She received the California State Teacher Association’s Gold Award for excellence in Education and a Jefferson Award in 2009. Diane holds a B.A. in Environmental Studies and a Multiple Subjects Teaching Credential from California State University, Sonoma. Under Diane’s leadership, ETC was awarded the San Francisco Foundation’s John R. May Award for nonprofit excellence and creativity and, in 2015, the Dewitt Partnership Award by the California State Parks. She has grown ETC from a home-grown great idea to a nationally recognized pioneer in accessible outdoor adventure programming. At times, Diane can be found on the river or with a pack on her back, but her main focus is supporting the programs’ staff and helping with the development of the programs’ curricula.

 Oren Frey, Sea Kayak Program Manager  (, ext. 13)                               Oren graduated from Middlebury College in 2002 with a B.A. in Environmental Studies / Human Ecology. He started guiding outdoor trips in Vermont, and has since worked as an educator, trip leader, and program manager with a variety of organizations, including Naturalists at Large, Adventures Cross Country, the Experiment in International Living, and Carpe Diem Education. He has also worked on political campaigns, completed marine policy research for the Monterey Bay National Marine Sanctuary, and co-founded the largest community supported fishery (CSF) program on the West Coast.  Oren also holds an M.A. in International Environmental Policy from the Monterey Institute of International Studies, has traveled widely on six continents, has kayak-guided on Catalina Island, Monterey Bay, and in the San Juan Islands, and loves sharing adventures with others. Oren was introduced to ETC as an Intern with the Winter Program in 2003, and is excited to join the ETC Community and take the reins of the Sea Kayak Program. 

Magen Kuzma, Office Manager (, ext. 10) Magen joined ETC after spending six years managing the award-winning and eco-friendly concession at Muir Woods National Monument. She concentrated on building one of the first models within the National Park Service to focus on local, healthy, and seasonal food sources and sustainable retail. Magen has also worked in retail operations at Oriole Park at Camden Yards, and she supported operations for the Washington Capitals and Baltimore Ravens. She received her B.S. in Retail Management from Michigan State University in 2006. Magen is enthusiastic about jumping into the Office Manager position and supporting ETC’s mission and staff.

Reese Hodges, River Program Manager  (, ext. 15)  Since his earliest days, Reese has been paddling, swimming, and playing in rivers from the northern Rocky Mountains to South America. After he graduated with a B.A. in Environmental Studies from UC Santa Barbara, he worked many seasons as an outdoor educator and river guide. His passion for international watershed conservation led him to work on projects to protect wild rivers in Chile, and to promote sustainable agriculture practices in El Salvador. He recently completed a joint degree MBA/MA in International Environmental Policy. His favorite things are to play guitar on the riverbank, and to share the joy of adventures in nature with others. He is ecstatic to join ETC and lead the river program onward and upward! 

Sarena ("Sari") Lesem, Development and Youth LEAD Program Associate (, ext. 14) Motivated by a deep commitment to social justice, outdoor exploration and education, Sari has devoted her time to mentoring youth in the great outdoors to achieve greater self-growth and connection to nature. With a background in Wilderness Therapy, Sari brings her passion for non-violent communication, group facilitation, and pursuit of healthy living through the lens of the wilderness to ETC. Sari graduated from Colorado College in 2015 with a B.A. in Philosophy. She has worked in a variety of leadership roles and organizations, including The Oxbow School, Catamount Institute, Urban Adamah and Evoke Therapy Programs. She continues to pursue training in holistic health, most recently getting her Yoga Teacher and Reiki certification. Sari is thrilled to join the ETC team as the Development and Youth LEAD Program associate!

Keeping the great outdoors open to all.