Allen began his teaching career as an instructor at the University of Minnesota, and later received an appointment as an assistant professor of astronomy at
Colgate University in
Hamilton, New York, where he taught for twelve years. Miller had previously worked with Allen in the New York Department of Education. After his permanent successor,
J. Wayne Reitz, assumed office in 1955, Allen continued to work as the
executive vice president of the University of Florida until 1957. and the
Florida Board of Control appointed Allen as the first president of what would become the new
University of South Florida (USF) on June 27, 1957. and would lead the new university as its president from its inception in 1957 until his
retirement in 1970. On August 1, 1957, the newly minted university president and his secretary Ann Strickland moved into a borrowed office in the Hillsborough County Courthouse and went to work. When Allen arrived in
Tampa in 1957, the fledgling university did not have a name, physical plant,
faculty or students. The
Florida Legislature appropriated $1.2 million in 1957 and another $5 million in 1959, and construction of the first three buildings began in earnest on of largely empty sandy brush land located north of downtown Tampa. Ten years later, when Allen retired, USF had over 14,000 undergraduate and graduate students. Under Allen's leadership, South Florida heralded itself as the "
Harvard of the
South", and emphasized academics to the exclusion of
major college sports. Allen became known for his opposition to major college sports programs in favor of a more academically centered university environment. == Legacy ==