A University of Minnesota faculty member passed away last month after fighting complications resulting from a heart attack.

Frank W. Snowden, 74, was a chemical engineering and materials science professor. He passed away on May 22, 2014, according to the Star Tribune.

Snowden also worked with the National Science Foundation and Science Museum of Minnesota, according to the Star Tribune.

Vice President for Equity and Diversity Katrice Albert called Snowden a “national treasure” in a May 30 statement, adding that he played a role in diversifying the University.

“As a professor of chemical engineering and materials science,” the statement said, “his efforts to grow the number of well-credentialed students of color in STEM fields and recruit and mentor top-flight junior faculty of color were exemplary.”

Snowden is survived by his wife Sue Nauschultz, his daughters Stephanie and Caroline Snowden, granddaughter Anne Turnbull and other extended family members, the Star Tribune reported.