He is best known for his boldly coloured, strongly patterned landscape and still life paintings.  He exhibited his works in London, Glasgow, Dublin and all over Europe. As many artists of the 1960s did, Crozier combined painting with teaching.  When he retired from teaching in the 1980s, Crozier’s painting blossomed with a new freedom and confidence.  Examples of the artist’s work can be seen in most major public and private collections in  Ireland, Great Britain and in the National Galleries of Canada, Poland and Australia among many other national collections.  William Crozier’s work features in all current reference works on 20th century Irish and Scottish Art.  From the early 1980s he divided his time between homes and studios in Hampshire and at Kilcoe, West Cork.  Ireland, particularly the distinctive west Cork landscape, was central to his artistic vision.  The Frank Lewis Gallery  hosted two very successful solo exhibitions of his work.