[5][6] Severiano Teixeira is the author of several publications in the fields of Military History, International Relations, Security and Defense, and European Integration.

[7] Nuno Severiano Teixeira was born in Portuguese Guinea, in 1957,[8] when his father was serving in military mission.

He is a descendant of Colonel José Manuel Severiano Teixeira, who was awarded Commander of the Order of Avis, in 1989.

[10] Nuno Severiano Teixeira has also the Habilitation degree in Political Science and International Affairs, from the New University of Lisbon.

He also taught at the History Department of the Institute of Labor Science and Enterprise in Lisbon (ISCTE-IUL), between 2002 and 2006,[12] and at the Portuguese Catholic University, between 1998 and 2013.