Orfeas holds an LL.M. degree in International Legal Studies from New York University (2013-2014), where he was awarded the Jerome Lipper Award for distinction in the field of international law, as well as an LL.M. in Public International Law from Athens University (2012-2014).  He obtained his first degree in Law from Aristotle University of Thessaloniki (2007-2012). In the past, He has also followed the general public international law courses and directed studies program at the Hague Academy (2012).

Orfeas has worked for the International Criminal Tribunal for the Former Yugoslavia (2012) and the United Nations International Law Commission (2014). He has also worked as an adjunct assistant lecturer (2016) and as a teaching assistant at Athens University (2015-2016), as well as a research assistant at New York University (2013-2014). His research interests include dispute settlement, the law of international organizations, international investment law, and the history and theory of international law.