He is the head and a founding member of the Ελληνικής Βιβλικής Εταιρείας (Hellenic Bible Society) in charge of the programme for the translation of the Old Testament in Modern Greek.

[1] He is also member of the scientific committee for the translation project of the United Biblical Companies worldwide.

[2] From 1983 Konstantinou holds a Ph.D. in Biblical Hermeneutics at the Aristotle University of Thessaloniki with the thesis Ο Κύριος εβασίλευσεν.

[2] From 1982 to 1988 he has taught as a lecturer Old Testament and Biblical Hebrew language at the department of theology of the Aristotle University of Thessaloniki.

Konstantinou was awarded by the Ecumenical Patriarchate with the honorary title of the "Teacher of the Gospel" while he is the delegate of the Greek church to the International Commission for the Angilcan-Orthodox dialogue (ICAOTD).