Cantú is among the longest tenured Hispanic law professors in the country. He has been a Fulbright Scholar, teaching at the Universidad de René Gabriel Moreno in Santa Cruz, Bolivia. An engaged member of the San Antonio community, Cantú serves numerous civic organizations, including the boards of the Witte Museum, San Antonio Hospice and the Winston School. He served as dean of the School of Law for seven years, concluding his deanship in 2014.
As a dean, Cantú organized and conducted a summer entry program for potential first-year law students with low predictors. Cantú has raised significant contributions for the law school, most of which is marked for scholarships to attract the best and brightest students to the School of Law. He introduced the subject of products liability into the curriculum, both as a course and as an advanced seminar. He is a founding member of The Scholar, a journal at the St. Mary's University School of Law. Cantú also increased alumni participation through giving by establishing three new law alumni chapters in McAllen, Austin and El Paso.
Fulbright Scholar, Universidad de René Gabriel Moreno, Santa Cruz, Bolivia, 1966
Visiting Faculty, South Texas College of Law, 1979-1980
Visiting Faculty, University of Houston, 1971
Member, Numerous Committees of the American Bar Association that conducted many inspections of accredited law schools
Traveled around the globe in an effort to provide St. Mary's students with networking and educational opportunities
Former dean of the St. Mary's School of Law, 2008-2014