Doyle's research interests include international relations theory, international law, international peace-building and the United Nations. From 2006 to 2013, Doyle was an individual member and the chair of the UN Democracy Fund, a fund established in 2005 by the UN General Assembly to promote grass-roots democratization around the world.
Doyle previously served as assistant secretary-general and special adviser for policy planning to United Nations Secretary-General Kofi Annan. He formerly taught at Princeton University, Johns Hopkins University, and the University of Warwick in the United Kingdom.
As one of the co-directors of the Columbia Global Policy Initiative's project on International Migration, Doyle helped develop the Model International Mobility Convention, an framework which addresses the gap in international law that fails to address international mobility and proposes a framework for mobility with the goals of reaffirming the existing rights afforded to mobile people (and the corresponding rights and responsibilities of states) as well as expanding those basic rights where warranted.
Read Professor Doyle's commentary of the Model International Mobility Convention published in a Special Issue of the Columbia Journal of Transnational Law on January of 2018: "The Model International Mobility Convention."