He returned to Mauritius as a teacher at the Royal College, Mauritius (1933-1935). He was then employed by the Colonial Agricultural Services as a Plant Pathologist in the Department of Agriculture, Mauritius, and transferred to Nyasaland in 1948, where he stayed until 1953. He became the first director of the Mauritius Sugar Industry Research Institute (MSIRI). From 1968 to 1973 he was Vice-Chancellor of the University of Mauritius, where the Paul Octave Wiehe Auditorium was named in his honour in 1975.
