After graduating from the University of California at San Francisco, Eady worked as an Assistant Regional Counsel at the United States Environmental Protection Agency. She served in the role for six years (1989-1995) and worked in Regions eight (8) and nine (9). In particular, Eady highlights a case she worked on against W. R. Grace, a company infamous for its asbestos mining in Libby, MT, that led to the death and sickness of thousands of people. While on the case, she learned that she grew up a block from a plant owned by the company, but she didn't know until the Center for Disease Control's Agency for Toxic Substances and Disease Registry (ATSDR) sent a warning letter about the plant. The plant is now closed, but Eady investigated further and learned that three neighbors on her street, out of around ten houses, had died from lung cancer. Her family was instructed to visit the doctor in the letter. After visiting, she learned that it was essential not to inform your health insurance if you've been exposed to asbestos and that lawyers wouldn't speak with her regarding the issue unless she were sick. Upon learning and experiencing the case, Eady left the organization with a deep empathy for the communities in which she worked, something she carries with her in her work today.

Afterward, in 1998, she became the Executive Director for Alternatives for Community & the Environment. In 1999, she joined the Executive Office of Environmental Affairs as the Director of Environmental Justice and the Brownfields Program, where she served for three years until departing in 2002. In 2000, Eady joined Tufts University as a Lecturer, teaching environmental justice, environmental communications, environmental law, civil rights, and place-based learning. She taught for almost five years at the university before joining WE ACT for Environmental Justice in 2004, where she worked on legal matters for the organization, including real estate, personnel, and programmatic issues.

She joined the New York Lawyers for the Public Interest as an Associate General Counsel in 2005. Among her responsibilities were overseeing programs related to environmental justice and tending to organizational needs such as lobbying, fundraising, and employment policies. Eady briefly worked overseas in Germany as a faculty member in Human Rights and Humanitarian Law at the LLM Program at Europa-Viadrina University during the first half of 2013. While there, she created workshops and programs for student learning and supported students on thesis development, research, and writing.

Upon returning to the U.S. in 2013., Eady became Vice President and Massachusetts Director of the Conservation Law Foundation. She left this role in 2017 to become an Adjunct Professor of Law at Vermont Law School and the University of California at Davis. She taught part-time at these institutions while working full-time at the Bay Area Air Quality Management District as Senior Deputy Executive Officer for Policy & Equity, where she served as the primary contact regarding environmental justice from 2020 to 2023.

She teaches at the University of California at Berkeley's School of Law as an Adjunct Professor of Law. She also serves as the Vice President of Equity and Justice at the Resources Legacy Fund (RLF). At RLF, she is responsible for shaping the organization's vision and strategic direction regarding equity and justice. Eady helps design and implement programs, projects, and campaigns to ensure equity and diversity outcomes.

Eady's expertise has led her to serve on many boards and councils, including the National Environmental Justice Advisory Council, the EPA's advisory committee for environmental justice, the Earth Island Institute, and the Conservation Law Foundation. She currently serves as a Steering Committee Member for the Center for Science and Democracy, a Union of Concerned Sciences project.

Reflecting on career highlights, Eady highlights the time she was on a legal team that successfully took a case on climate change to the Massachusetts Supreme Court. She successfully argued the case for her youth clientele with the junior attorney. She also notes that the legal team she worked on successfully took a disability rights case to the United States Supreme Court.