Our Team

Meet Our Team!

Nancy Longacre


Nancy joined the Nature Center in August 2021 as the Executive Director. She has a B.A. in psychology from Rutgers University. Nancy started her career in corporate marketing before transitioning to nonprofit management. She has held leadership positions at several non-profits in Metro Atlanta. Nancy loves spending her free time hiking, traveling, being in nature and enjoying everything Metro Atlanta has to offer with family and friends.

Susan Staff Photo Dunwoody Nature Center

Susan Mitchell

Controller (she/her)

Susan oversees the Nature Center’s finances. She has a B.A. from Notre Dame of Maryland and an MBA from Emory University. Susan has held leadership positions in corporate, government and non-profit organizations.

Holly Loscavio

Environmental Education Director (she/her)

Holly Loscavio has been a program manager and camp director since 2015 and loves teaching environmental education to children.  Holly really enjoys teaching one of the Mommy and Me classes and introducing little ones to nature.  Holly has a B.S. in Conservation Biology from Brigham Young University and has taught non-formal science education since 1994.  Holly’s hobbies include long distance running, hiking, plant identification, playing the guitar and spending time with her five children ranging in age from 24-9.  

Sandy Layton

Development Director (she/her)

As an Atlanta native, Sandy enjoys a passion for her hometown and has been naturally drawn to devoting the last 20 years to environmental work in the nonprofit community. Educated at Georgia State University, she spends her free time with friends hiking out west, tennis, scuba, and travelling anywhere. Interest in the natural world provides a reason to be a forever learner!

Darcy Johnson


Darcy has worked at the Nature Center since 2018 as an educator, building host, and Sunday program coordinator before taking on the role of Environmental Education Manager in Fall 2020. She graduated from San Francisco State University with a B.S. in Recreation, Parks, and Tourism, and loves teaching children and adults about nature and science. In her free time, she enjoys camping with friends and family, reading, painting, and looking for critters in creeks. 

Madhav Dave


Madhav is responsible for managing our rental facility program, special event coordination, and general infrastructural organization. He graduated from Georgia State University, with a B.S. in Public Health, and plans on pursuing graduate school in hopes of earning his Masters in Public Health, with a concentration in Policy & Management. In his free time, he enjoys staying active and exercising.

Mary O'Kerns


Mary handles all volunteer relations, supervises weekend educational programs, and liaisons with the City of Dunwoody to serve as environmental steward for Dunwoody Park. She graduated from the University of Georgia in 2017 with a Fisheries and Wildlife degree. She moved back to Georgia in 2021 after living in Germany for 3 years. Her passion is educating the public about the wonders of nature.