Werkman was a member of 'De Ploeg', the Groningen artists' society founded in 1918. He designed and printed posters and other printed material for them. From 1923 until 1926 he published the avant-garde magazine 'De next call'. During the Second World War he was part of a group that went by the name of 'De Blauwe Schuit' and produced publications intended as moral support in those difficult years. Werkman was a Sunday painter in the true sense of the words: he was self-taught and painted on Sunday. During the week he made his 'scraps' in his printing works. His oeuvre consists of around sixty paintings

Hendrik Nicolaas Werkman
Leens 1882 - Bakkeveen 1945