He has lectured at the Pratt Institute, Marymount College, the School of Visual Arts, and the Society of Illustrators, where he has also served as a trustee.
[1][3] Barkley has created work for the novels of Pearl S. Buck, Stephen King, James Baldwin, and Alex Haley.
Among other commissions, he has created artwork for productions of operas The Merry Widow, Madame Butterfly, and La bohème.
Postal Service, NBC, IBM, General Foods, PepsiCo, Sony, Columbia Pictures, Esquire, and McCall's.
[2] He is credited with illustrating the book covers for A Torrent of Faces, The CTZ Paradigm, Ladis and the Ant, and Sounder, by William H.