He was employed at the Glasgow School of Art as a pupil teacher, both teaching and studying.
In 1863 the headmaster of the school, Charles Heath Wilson, retired and Greenlees was appointed his successor.
[2] Greenlees advocated for the attendance of women pupils at life classes, and appointed four female teachers at the school.
[2] Greenlees also introduced the teaching of nautical draughtsmanship – a number of designers at the Clyde shipyards were graduates of the school.
You can help Wikipedia by expanding it.This article about a British painter born in the 19th century is a stub.