She was a producer and reporter for KQED. In 2003, Martin was a freelance reporter in Afghanistan, for NPR. In 2005-2007, she was foreign correspondent for NPR. In 2007, she covered the Virginia Tech shooting. In 2008, she was a correspondent for ABC News. In 2010,Martin was National Security Correspondent for NPR. She took over as host of Weekend Edition Sunday in 2012, shortly after longtime host Liane Hansen stepped down.