Grigsby was a celebrated artist, writer and educator who obtained a B.A. degree from Morehouse College, a M.A. in art from Ohio State University and a Ph.D. from New York University. He met his long time mentor, Hale Woodruff at Morehouse. He was a Professor Emeritus of Art and recognized internationally as an artistic voice for African Americans. He received countless awards and distinctions and has exhibited extensively throughout the United States in solo and group exhibitions. His paintings and sketches have been noted for their energy and spirituality.