Complex sentence: In 1953, he became an Associate Professor of Business and Economics at Mississippi College, Clinton, Mississippi, followed by a return to Stetson University as Assistant Professor of Economics in 1956.
Split into simpler sentences: In 1953, he became an Associate Professor of Business and Economics at Mississippi College, in Clinton, Mississippi. In 1956, he returned to Stetson University where he served as Assistant Professor of Economics in 1956.