David Elazar received his B.A. in Chemistry from Wayne State University (Detroit) 1964. In 1965, on an SLA scholarship, he completed his M.A. in Library Science at the University of Michigan. He served 5 years as Reference Librarian at the Wayne State University's science library and as Head Librarian of the United Hebrew Schools/College of Jewish Studies (Detroit). During his tenure at the UHS, he devoted much of his time to the development of the Classification System for Libraries of Judaica. In 1970 he moved to Israel with his family. From 1970 to 1981 he held the position of Information Officer in the Technical Information Center of a large company and in 1981 was appointed manager of the Center. During the past 29 years he has been active in developing, maintaining and managing a modern, up to date information center to serve all the aspects and needs of the company's technical information.

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He is a member of the Special Libraries Association, the American Society for Information Science, the Israel Society of Special Libraries and Information Centres, and the Association of Jewish Librarians.