Diek obtained a BA Fine Arts degree from the University of Pretoria in 1987 and a MA in Fine Arts from the University of the Witwatersrand in 1996. He recently completed a PhD in Art at Unisa on Narrative strategies in the creation of animated poetry-films.
Since 1989 he has regularly exhibited solo as well as in a variety of curated group exhibitions nationally and internationally and continues to do so. His work has been included in various South African public and corporate collections. Diek has been working with animation for 20 years. Since 2009 Diek has focused in his personal work on animated poetry-film.