Di graduated from Rhodes University in 1973 with a B. Fine Arts (Honours) majoring in Painting. She has exhibited widely in solo and group exhibitions in South Africa and abroad. A number of her works form part of private and public collection locally and private collections abroad. Di is a painter and printmaker for which she has achieved numerous awards. Di is a Fellow of the South African Society of Artists and has achieved Associateship of the Water Colour Society of Southern Africa. Di has illustrated a number of books, annual reports and technical papers. Di has been fortunate to have been in residence at the Cite in Paris on three occasions since 2008.
Di Johnson-Ackerman is a disciplined observer and a skilled draftswoman, concerned with rendering subtle colour and reflection. “I love simplicity, clean lines, detail and definition. I love the mood that darkness and light evokes …. the mystery of the shadows within Karoo buildings contrasting with the clarity of the light outside”.