The main aim of the article is to find out how the professional public librarians have changed during last decades of huge changes in public libraries. Specialists which have long professional work experience as public librarians were selected for this research. Due to this, the empirical research was performed. The research points out professional and personal changes of librarians due to modernization processes at the library as social institution acting in information and communication field. Quantitative research was used to fulfill the task of the research. Questionnaire was created for the research and was used to survey the librarians of selected libraries. Research reports the results of the study based on the data derived from actual observation of several Lithuanian public libraries and their librarians, who have their work experience at the library more than 10 years. Five public libraries which have won competition of the best public libraries in Lithuania according to their results were chosen (competition was arranged in the frame of the project ”Bibliotekos pažangai” (Libraries for Innovation) initiated by Bill & and Melinda Gates Foundation. The research consists of several steps. Selection of libraries was made at the first step. The second step of the research was to choose librarians from selected libraries with indicated work experience. The third step was to make a quantitative study. For this purpose a special questionnaire was created. The research results indicate professional and personal changes of public librarians due to intensive Information technologies development at the libraries and show professional librarians as agents of changes.

Keywords: Changes, Public libraries, Public librarians, New generation, Information technologies, Library highway