Starting his work on IDW comics alongside Chris Mowry in the 2009 prequel to live-action movie Revenge of the Fallen series Defiance, Griffith has since taken part in virtually every aspect of the previous IDW Trasformers universe: All Hail Megatron, Robots in Disguise, Lost Light, Optimus Prime, and Unicron, plus the live-action tie-in series Foundation and the Bumblebee prequel. He also worked on the Hasbroverse title Micronauts: Wrath of Karza, Revolutionaries, and M.A.S.K., and the DVD covers for two editions of Shout! Factory's 25th Anniversary of The Transformers movie.
Most recently, however, he has brought his art skills once more back to IDW, and designed a new character for the latest incarnation of their Transformers comics series! Outside of Transformers, you can also find his work on Teenage Mutant Ninja Turtles, Snake Eyes, Jem and the Holograms, Back to the Future, Atomic Robo, and more, including the anthology in support of the Orlando Pulse shooting victims and survivors, Love is Love.
Examples of Andrew's work;
Transformers RID Volume 1: https://amzn.to/2U2Jty8
Transformers RID Volume 2: https://amzn.to/2XSQra6Transformers RID Volume 3: https://amzn.to/3gOntkk