High Quality Content by WIKIPEDIA articles! Mark Liberman is an American linguist. He has a dual appointment at the University of Pennsylvania, as Trustee Professor of Phonetics in the Department of Linguistics, and as a professor in the Department of Computer and Information Sciences. He is the founder and director of the Linguistic Data Consortium. Liberman attended Harvard College but did not graduate. After two years' service in the U.S. Army in Vietnam, he enrolled in graduate school in Linguistics at MIT where he received his MA and, in 1975, his PhD. From 1975 until 1990 he was a Member of Technical Staff at Bell Laboratories.