Ondrej Mészáros was born in 1949. After graduating from high school in 1967, he studied philosophy and Hungarian at the Faculty of Philosophy of Comenius University in Bratislava from 1968 to 1973. He joined the Institute of Philosophy (then the Institute of Philosophy and Sociology) in 1983. Initially, he focused on social philosophy with a special emphasis on issues of social time. After 1993, he returned to his original research focus: the history of philosophy in former Upper Hungary and the contacts between Slovak and Hungarian philosophy. Throughout his time at the Institute of Philosophy of the Slovak Academy of Sciences, he was assigned to the Department of the History of Philosophical and Political Thought and, as a member of the department, worked on VEGA research projects, mostly under the auspices of Prof. Pichler. He habilitated in 1995 and was inaugurated in 2000. From December 1989 to April 1990, he was a member of the Action Committee of the Slovak Philosophical Society, which prepared the reorganization of the society into the Slovak Philosophical Association. Subsequently, he was a member of the editorial board of the journal Filozofia for many years. During his time at the Institute of Philosophy as a visiting lecturer, he spent time at universities in Hungary (Szeged, Miskolc, Pécs, Budapest) and Romania (Cluj-Napoca).
