Alexandra Kosiba is a forest ecophysiologist whose research and outreach focus on the forests of the Northeastern United States—their ecology, their structure, and the services they provide—as well as how these attributes are impacted by climate change. She works with landowners, forest professionals, and decision-makers to incorporate ecology, climate change, and carbon science into stewardship practices. Kosiba is also the coauthor of A Guide to Forest Carbon in the Northeast (2024).