Matt Melvin is a cartoonist that formerly worked on Cyanide and Happiness with Rob, Kris and Dave. After parting ways with the others around #3460 due to the team "pulling in different directions" according to Dave, he started another webcomic, The Last Nerds on Earth with his girlfriend Austin. It ended indefinitely in 2016.
Matt was the last of the original four to stop using system fonts for dialogue. His distinctive font (#1939 through #3460) is Leonardo White's Mechanical Pencil. It is the only regularly used non-system dialogue font to have lowercase letters and not be published by Blambot, and its capital E is distinctively rounded (seen in #1939).