Murtha Baca received a Bachelor of Arts degree from University of California, Los Angeles in 1973. In 1975 he received a Master of Arts degree and Ph.D. degree in 1978.
Murtha worked as a lecturer in Italian at the University of California, Los Angeles in 1978-1979, freelance editor and translator since 1979, visiting assistant professor of Italian at the University of Southern California, Los Angeles in 1984-1985, assistant director of Armand Hammer Center for Leonardo Studies at the University of California, Los Angeles in 1986-1987, assistant archivist for Provenance Index, Getty Art History Information Program at Getty Information Institute, Santa Monica, California in 1988, name authority editor at Vocabulary Coordination Group in 1988-1990, senior editor at Standards and Research Projects since 1988. Currently he worked as IS lecturer at the University of California, Los Angeles, California, United States.
He is a member of College Art Association of America, Visual Resources Association, Art Libraries Society/ North America.