Painter, mural artist, illustrator and teacher. Born in London Rosoman basically remained there, although he travelled extensively. He studied, 1930–5, at King Edward VII School of Art, University of Durham, where his teachers included E M O’Rorke Dickey, then at Royal Academy Schools, 1935–6, and at Central School of Arts and Crafts, 1937–8, under Bernard Meninsky. Rosoman taught from 1938–9 at Reimann School, where his subject was perspective, but on outbreak of World War II he was mobilised into the National Fire Service. In 1943 he was seconded to the War Office to illustrate books on firefighting, being appointed an Official War Artist to the Admiralty in 1944. His depictions of firefighting were among his most outstanding early work.