Our Team
Brian Greene
Program Director
Brian joined APIPP as the Aquatic Invasive Species Coordinator in April 2021 and assumed the role of Program Director in September 2024. Brian's career has focused on citizen-science monitoring of aquatic and terrestrial ecosystems. He most recently served as the director of trails and conservation for the Delaware and Lehigh National Heritage Corridor in Pennsylvania. Previously, he established the statewide Utah Water Watch volunteer water quality monitoring program and has a strong research background looking at amphibians, invasive plants, and water resources across the United States.
Brian holds a Bachelor of Science degree in Biology from Wofford College in Spartanburg, South Carolina, and a Master of Science in Natural Resources from Cornell University.
Email: brian.greene@tnc.org
Phone: (518) 576-7251
Shaun Kittle
Invasive Species Communications Coordinator
Shaun joined APIPP as the Invasive Species Communications Coordinator in May 2022. In this position, Shaun applies his training in journalism and ecology and experience working in communications for several Adirondack nonprofits to engage community members and the public in efforts to prevent, monitor and manage invasive species. Shaun is an accomplished writer and photographer, and is a former reporter for the Adirondack Daily Enterprise and past contributor to Adirondack Life.
Shaun received Bachelor of Science in Magazine Journalism from the State University of New York at Plattsburgh.
Email: shaun.kittle@tnc.org
Phone: (518) 576-7236
Ari Giller-Leinwohl
Terrestrial Invasive Species Manager
Ari joined the APIPP team as Terrestrial Invasive Species Manager in April 2024. He has worked to manage invasive species in Vermont, New York’s Hudson Valley, the Mid-Atlantic, southwestern US, and downeast Maine, as well as studies with endangered plants and small mammals in Utah and Northern Arizona. Most recently, Ari has worked as an ISA certified arborist specializing in pests and diseases of northeastern trees and shrubs. He is excited to move to the Adirondacks and join in efforts to conserve this amazing area.
Ari holds a Bachelor of Science degree from the Integrated Science and Technology (ISAT) major at James Madison University.
Email: a.gillerleinwohl@tnc.org
Phone: (518) 576-7262
Carolyn Koestner
Conservation and GIS Analyst
Carolyn joined the APIPP team as the Conservation and GIS Analyst in September 2024. In this position, she coordinates the APIPP and St. Lawrence-Eastern Lake Ontario PRISM remote sensing, GIS, and data analysis activities to inform invasive species survey and management work across northern New York.
Carolyn holds a B.A. in Environmental Science from Skidmore College. She is currently pursuing a graduate certificate in GIS focused on spatial data analysis and working toward earning her GIS professional (GISP) certification. In 2024, Carolyn completed a GIS and Science Communications fellowship with the AuSable Freshwater Center and Lake Champlain Sea Grant.
Email: carolyn.koestner@tnc.org
Phone: (518) 576-7253