In 2011–12, Domingo was a joint Straus Institute and Émile Noël Fellow at New York University (NYU) School of Law.[8][9] Since 2012, he has served as Francisco de Vitoria Senior Fellow and the Spruill Family Professor of Law and Religion at the Center for the Study of Law and Religion at Emory University in Atlanta.[10] In 2020, Domingo was appointed the Álvaro d'Ors Professor of Law at the Institute of Culture and Society at the University of Navarra.[11]
Domingo believes that due to worldwide economic crisis, a system of global justice is necessary to address crimes against humanity, and that the democratic deficits of international institutions highlight the need for an innovative and truly global legal system[18] that permits humanity to reorder itself according to global needs and evolving consciousness.[19]
Great Christian Jurists in Spanish History (Cambridge University Press, 2018), co-editor with Javier Martínez-Torrón
Great Christian Jurists in French History (Cambridge University Press, 2019), co-editor with Olivier Descamps
Christianity and Global Law (Routledge, 2020), co-editor with John Witte Jr.
Law and the Christian Tradition in Italy (Routledge, 2020), co-editor with Orazio Condorelli
Estudios sobre el primer título del Edicto del Pretor [Studies on the First Part of the Praetor's Edict] (Universidad de Santiago de Compostela, 1992, 1993, 1995)
Auctoritas [On Authority] (Ariel, 1999)
Código civil japonés. Estudio preliminar, traducción y notas [The Japanese Civil Code. Preliminary Study, Translation and Notes] (Marcial Pons, 2000), in collaboration with Nobuo Hayashi.
Ex Roma ius [From Rome, Law] (Thomson Aranzadi, 2005)
Álvaro d’Ors, una introducción a su obra [Alvaro d’Ors, an introduction to his works] (Thomson Aranzadi, 2005)
Principios de Derecho Global. 1000 reglas jurídicas y aforismos comentados [Principles of Global Law. 1000 Legal Rules and Commented Aphorisms] (editor and coordinator) (Thomson Aranzadi, 2006)
¿Qué es el Derecho Global? [What is Global Law?] (Thomson Aranzadi, 2008)