He nevertheless maintained an unflinching passion for cosmological subjects, adding to it another one: Ordovician palaeontology, an area in which he occasionally engages in published peer reviewed academic work for over two decades.

Marques Guedes attended the Instituto Superior de Ciências Sociais e Políticas, University of Lisbon, where he obtained his first degree in 1975, in administration.

His student colleagues at the LSE included noted South-African born David Lan, playwright, filmmaker, theatre director, now at the helm of London's Young Vic Theater and of the Word Trade Centre arts hub in New York, and also Charlotte Seymour-Smith, daughter of the famous poet and literary critic Martin Seymour-Smith.

While in Paris, he regularly attended the Collége de France mid to late 1970s weekly seminars of Michel Foucault and Claude Lévi-Strauss.

He was at the time carrying out two and a half years of participant observation field research among the Atta, hunter-gatherer groups roaming the thick primary tropical rain-forests of Kalinga-Apayao, a province in the northernmost mountainous reaches of the Philippine archipelago, in the northeasternmost ranges of Luzon's Cordillera Central.

During his thirty two months there he collected detailed ethnographic data on the religious and political aspects of the social life of the hitherto unstudied Atta pygmy Negrito nomads.

After a stint of over a decade in which he left academia for a diplomatic posting in Angola, as the first Cultural Counsellor to the Portuguese Embassy in Luanda, Marques Guedes returned to Portugal in 1990, fully re-entering academic life.

Armando Marques Guedes has pursued a diversified career in anthropological, sociological and international, as well as national, political research and teaching.

In 1994–1996, Marques Guedes was a co-founder, at the Faculdade Ciências Sociais e Humanas of Universidade Nova, of what is now known as the Departmento de Estudos Políticos; there, for four years, he served as president of its Pedagogical Council.

Political, genealogical and administrative constraints in training for diplomacy, was launched by Ambassador Gruša and Collége d'Europe Rector Paul Demaret at the College of Europe in Bruges.

Marques Guedes is a regular speaker in a variety of Portuguese and international venues, having given talks and organised courses in well over forty countries.

A large set of similar positions, mostly in think tanks and research institutions, have been held by Marques Guedes since the beginning of the first decade of the present century.

He worked as a consultant of both state and non-state entities in African countries such as Angola, Cabo Verde and S. Tomé e Príncipe, as well as European ones such as Slovenia, Serbia, Romania, Poland, Hungary, Georgia, Croatia, and the Czech Republic, and, in Asia, East Timor.

Marques Guedes has published seventeen books and well over one hundred and twenty articles on subjects as varied as international politics, security, diplomacy, social anthropology, and palaeontology.

As was earlier the case with his academic publications, his writings, conferences, and consultancy work in these latter domains have gained a growing domestic and international recognition.