Born in 1968 in Stratford-upon-Avon, Warwickshire, Davis attended Alcester Grammar School, before gaining a "Diploma in Technical illustration" from Mid-Warwickshire College, Leamington Spa in 1986. He subsequently studied illustration and graphic design at Swindon College of Art and after graduating in 1988, he worked as a graphic designer and freelance illustrator of books and magazines for the next five years before moving into comics work in 1993/1994.
Davis has largely worked for the UK anthology 2000 A] For that publication, he has been a major contributor to the Missionary Man strip with writer Gordon Rennie, and to Sinister Dexter with Dan Abnett. He painted the Sinister and Dexter duo's first full-length story, "Gunshark Vacation", described by then-editor David Bishop as "a big fat hit".
He has also been the sole illustrator on a number of recent stories including Black Siddha and Stone Island. His work has been published around the world, most notably in the UK, US and Germany