In 1922, Sowers joined the faculty of the
University of Colorado (Boulder). He soon became director of the university's Bureau of Business and Government Research. He held this position until his 1942 death. until his death in 1942, Sowers served as secretary of the
Colorado Municipal League. In 1929, he served as president of the American Municipal Association (today known as the "
National League of Cities"). In 1936, Sowers wrote an article in opposition of a
ballot initiative that would limit
property tax in Colorado. Sowers characterized the initiative as a cynical ploy by property owners to capitalize off of
Great Depression-motivated anti-tax sentiments among the public in order to pass a limitation which in actuality would cause a
regressive shift of the state's tax burden away from property taxes to (among other things)
sales tax. The measure was ultimately roundly defeated by Colorado voters. Late in his life, Sowers served as secretary of the Colorado State School Board Association. ==Opinion survey work==