Whilst at Harvard Townsend began his teaching career and, by the time of his departure, held the position of
Assistant Professor. In 1966 he moved to the Department of Slavic Languages and Literatures at Princeton, of which he became chair in 1970. He held this position until his retirement in 2002. In addition to linguistics he also taught courses on Russian, Czech, Polish, Serbo-Croatian, Bulgarian and Old Church Slavonic. Townsend also spent stints as a visiting lecturer in the US, China, Czech Republic, Germany, Great Britain, the Netherlands and Russia. Spoken Prague Czech, as well as a comparative analysis of the Slavic languages which was translated into German in 2002 and Korean in 2011.'' :
It may be stated without fear of contradiction that Professor Charles E. Townsend of Princeton University has been the most influential writer on Russian and Slavic grammar in the United States. ==Legacy==