Adrian has had a somewhat typical path for a gamer. He started gaming while still in school and was an avid game until life got busy in the nineties. He was on hiatus until the mid-2000's when he returned to the gaming fold in 2007 with his first purchase in more than ten years.
Before becoming a game designer, Adrian held a wide variety of jobs perfect for inclusion on the dust jacket of his first novel: porter, chef, manufacturer, and property developer (among others).
His transition from gamer to designer came in 2014 when he purchased a few things from DriveThruRPG and realized he could do the same. His first project was in 2014 and there was another hiatus before he came back to it; since then, he's released at least one product every week but one.
Adrian and his imprint, Azukail Games, is probably best known for their wildly creative, system-neutral collections of 100 random items on dozens of topics from street names to battle cries. He also releases stock art, adventures and supplements for a wide variety of gaming systems.
Interview with an RPG Professional: Adrian Kennelly on RPG Geek
(Some data for this bio came from the interview)