She is a Center Fellow at the Freeman Spogli Institute for International Studies and assistant professor of Political Science at Stanford University.

She is also a non-resident senior fellow at the American Enterprise Institute and a strategic planner at the US Indo-Pacific Command.

[2] From 2006 to 2007, Mastro was a junior fellow for the Carnegie Endowment for International Peace's China program.

[1] Despite initially deciding to continue with an internship instead, Mastro enlisted in the U.S. Air Force in late 2008 and later started officer training to commission as a second lieutenant.

[5][8][9] Mastro is married to Arzan Tarapore, a research scholar at Stanford's Freeman Spogli Institute for International Studies.