[1] After leaving school, he worked in the banking industry before studying for a Bachelor of Arts degree in archaeology at the University of Durham in 1979.

[2] That year, Davis wrote his first paid article about Dungeons & Dragons for Games Workshop's White Dwarf magazine.

[3][4] Games Workshop developed Warhammer Fantasy Roleplay into its new subsidiary Flame Publications in 1989, where Davis remained on staff.

In 2022, Davis wrote Mythic Britain & Ireland, an expansion for Vaesen,[8] which won three 2023 Gold ENNIE Awards: Product of the Year, Best Setting, and Best Interior Art.

[9] In an interview with Wargamer, Davis explained that he had worked hard to honor the diversity of British and Irish folklore, and that his strategy for writing adventures was "not to overthink, trust yourself, and always keep the players in mind.