Keith's regular career (whenever he has active project work) is as a self-employed Control System & Automation Engineer. But he enjoys making people laugh (mostly through humorous stories, but occasionally simply from his looks) and/or making people think, which explains his passion for creating puzzles and games.
Keith focuses on this side pursuit whenever he has the time available (and sometimes even when he doesn't).
It serves as great stress relief and also helps out financially as proceeds from all of his sales are used to offset steep medical expenses for his wife who was recently diagnosed with cancer.