She has worked as a producer for WNYC New York Public Radio and has long taught in Lehman's College Now program, and before that at Long Island University in Brooklyn. Her first book A Radical Faith: The Assassination of Sr. Maura (Nation 2016), is a biography exploring the intersection of revolution, religion, empire and a woman's personal and political transformation in Cold War Central America. It was an editor's notable book of the week in the New York Times Sunday Book Review. A graduate of Fordham University and Columbia University Graduate School of Journalism, Markey has reported from London, Cambodia and Haiti, but spent most of her career covering urban poverty and public policy in New York City. She lives in the Bronx with her husband and two sons.