Joseph B. Reynolds (1881-1975) was a student and professor at Lehigh University from 1903 to 1948. We examine his major accomplishments in terms of Lehigh's change to a research mission in the 1920s. Reynolds's exploits include contributions to engineering as well as pure and applied mathematics. He is also viewed as an amateur historian, departmental administrator at Lehigh, and founder of our local EPADEL section.