Demets was an industrialist and became a municipal council member (1911–1929) and burgomaster (1919–1927) in Anderlecht, then a Liberal senator (1929–1945) in the district of Brussels.
Demets was an industrialist who served as municipal council member (1911–1929) and burgomaster (1919–1927) in Anderlecht, then became a Liberal senator for the Brussels district (1929–1945).