He is the TJX Feldberg professor of computer science at Brandeis University in Waltham, Massachusetts, United States.
His main topics of research are Natural language processing generally, and in particular, the computational analysis of linguistic meaning.
Pustejovsky first proposed generative lexicon theory in lexical semantics in an article published in 1991,[2] which was further developed in his 1995 book of the same name.
The TimeML project is a standard markup language for temporal events in a document, and has recently been adopted as ISO-TImeML by the ISO.
His previous work included the Medstract project, an effort to extract information from medical documents using current natural language processing technology.