Δημοσιεύσεις μελών--ΣΔΟ--Τμήμα Βιβλιοθηκονομίας και Συστημάτων ΠληροφόρησηςThe rapid changes in the Greek Library scene in the last decade and the need for librarians to work in a more complex and demanding environment create responsibilities for library schools to design and implement new programmes, adopting a new learning theory. A literature review indicated constructivism as a theory that could be used to create a new educational environment that will allow student-centered and collaborative learning, and facilitate interaction. In order to identify the competencies and skills required of library managers as perceived by practitioners, the authors conducted a survey. The population of the survey was the staff of Greek libraries, the data collection method was a census and the instrument was a structured questionnaire. Descriptive statistics, as well as ANOVA one-way, Pearson's parametric correlation and multiple regression were run to determine the present and needed managerial competencies and skills of Greek librarians