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  • About Rock Creek Conservancy


Matthew Fleischer, Executive Director


Matthew Fleischer was appointed as Executive Director of Rock Creek Conservancy on February 3, 2014.

Matt brings a new energy to the Conservancy and is tasked with growing the donor base and increasing the impact the organization has on Rock Creek Park and its watershed. The Conservancy is poised for growth and Matt is excited to play a key role in helping Rock Creek National Park celebrate its 125th Anniversary in 2015.

Sarah Mitchell, Development Officer


Sarah joined Rock Creek Conservancy in November of 2012. She completed her Bachelor’s degree at Macalester College in St. Paul, Minnesota. She has worked in marketing, event planning, and fundraising at The Nature Conservancy and Greenpeace as well as the Autism Society. As a native of the Washington, DC area, she grew up near Rock Creek and is having a great time introducing her children to it.

Karen Zeiter, Program Manager


Karen joined Rock Creek Conservancy in August of 2012. She graduated with a Bachelors of Science in Environmental Studies from Towson University and first started working with Rock Creek Conservancy as a Chesapeake Conservation Corps Volunteer. She has worked at the Food and Drug Administration in the Department for Environmental Safety and Strategic Initiative, the Chesapeake Bay Trust, and REI. As an active Outdoor Trip Leader throughout her college career, Karen enjoys outdoor recreation activities such as rock climbing, hiking, and backpacking.

John Maleri, Program Coordinator


John joined Rock Creek Conservancy in September of 2015. He graduated with a Bachelors in Biology from Providence College and has worked at Earth Day Network, Center for Science in the Public Interest, and Arcadia Power. John enjoys outdoor recreation activities such as volleyball, hiking, and camping. His favorite section of the park is the Pinehurst Branch.