In a career spanning over 60 years, she has covered a variety of topics, including portraiture, still life, landscape, as well as producing many large-scale charity paintings for organisations such as Oxfam, the Red Cross, and the Salvation Army.
Rosa is associated with The Worlington Movement, which seeks to promote classical training for art students and to assist young artists in acquiring essential skills in drawing and oil painting.
She runs a busy studio in Highgate, assisting in the development of artists such as Heath Rosselli Yuliya Lennon Tanja Hassel, Tracy Field, Cynthia Anatole, Dawn Kay and Sandra Busby.
She joined the Slade, but found that the school teaching methods still did not meet her needs and went on to learn by copying various works by artists such as Rembrandt, Turner, El Greco at the National Gallery.
Rosa's second subject in Camberwell was embroidery and when she had small children she stopped painting and applied her training at the National Gallery to creating fabric collages using the glazing technique of Old Masters.