Lindsay was born and raised in the town of Medford, New Jersey. She moved to Washington, D.C., to attend American University and study mathematics and international studies with a focus on environmental policy. After Hurricane Sandy devastated her home state, Lindsay became even more passionate about pursuing a career in fighting the threat of climate change. During her time in D.C., she participated in a scholarship program at the National Oceanic and Atmospheric Administration and an internship at the White House Council on Environmental Quality. She spent a semester studying the European Union in Brussels, Belgium. Lindsay worked on the Political Affairs team at the Environmental Defense Fund after graduating, putting her quantitative skills to work as a financial analyst. This summer, she returned to Washington to complete her internship at Resources for the Future.