He worked as a veterinarian (1961–66 and 1975–1980), as immunologist (1970–1975), book editor (1980–1990) and biology lecturer (1985–1995). He lives in New Jersey with his family.
Over the years, Çabej has penned over 100 articles and published 20 books in Albanian and English. Primarily, investigative contributions are in the evolutionary biology with emphasis in the role of epigenetics through the nervous system in the evolution of the animal. The theory, which is positively valued in peer reviewed journals,[1][2] is presented in four publications, “The Epigenetic Principles of Evolution” (2012) and “Building the most Complex Structure on Earth” (2013).
Mbi Natyrën e Jetës [On the Nature of Life]. Tirana. 1984.{{cite book}}: CS1 maint: location missing publisher (link)
Njohja Shkencore dhe Biologjia e Sotme [Scientific Knowledge and the Modern Biology]. Tirana. 1987.{{cite book}}: CS1 maint: location missing publisher (link)
Probleme Filozofike të Biologjisë [Philosophical Problems of Biology]. Tirana. 1988.{{cite book}}: CS1 maint: location missing publisher (link)
Neural control of development: The epigenelic theory of heredity. Dumont, N.J.: Albanet. 2004. ISBN9780971074668.
Epigenetic principles of evolution. London: Elsevier. 2012. ISBN9780124158313.
Building the Most Complex Structure on Earth An Epigenetic Narrative of Development and Evolution of Animals. Burlington: Elsevier Science. 2013. ISBN9780124017290.
Ilirët që mbijetuan : (Përgjigje simpoziumit "Ilirët dhe Shqiptarët" të Akademisë Serbe të Shkencave dhe Arteve) (in Albanian). Fan Noli. 2013. ISBN9789928165343.
Vazhdimësi iliro-shqiptare në emrat e vendeve (in Albanian). Tirana: Fan Noli. 2014. ISBN9789928165688.
Në gjurmët e perëndive dhe mitologjemave ilire [In the footsteps of Illyrian gods and mythologies] (in Albanian). Tirana: Fan Noli. 2014. ISBN9789928165671.
Epirotes: Albanians of Antiquity. New Jersey: Albanet Publishing. 2016. ISBN9781944788896.
Prejardhja dhe Formimi i Popullit Shqiptar I [Origin and Formation of the Albanian People] (in Albanian). Tirana: Fan Noli. 2017. ISBN9789928203953.
Epigenetic Mechanisms of the Cambrian Explosion. London-San Diego-Cambridge,MA: Academic Press. 2020. ISBN9780128143117.
Selected science translations
Darwin, C. (1859) The Origin of Species. Translated from the English original (1859) publication into Albanian.
Mendel, G. (1865). Versuche über Pflanzenhybriden. Translated from the German original, with an introduction for the Albanian readership
Autochthonie der Albaner in der deurschen Forschung. A compilation of selected pieces from 12 German historians and linguists of the last three centuries about the autochthony and the Illyrian origins of Albanians. Translated from German. With an introduction for the Albanian readership.