Johnson got his start working on magazines which covered the then-burgeoning fantasy role playing games industry. From there he got work at Marvel UK where he worked on weekly comic book series such as Transformers and Action Force. During this period Johnson's first work was published in the US in Marvel ComicsG.I. Joe European Missions in 1989; however this was not original work - the series reprinted his Marvel UK Action Force material.
His work on Marvel UK's Death Wreck series in 1994 led to him getting work from Marvel US on titles such as Thor (1994), Force Works (1995) and Spider-Man: Funeral for an Octopus (1995).
He then began a long period where he worked exclusively for Marvel's competitor DC Comics, initially on a six-issue storyline in Detective Comics #689-694 (September 1995- February 1996) which led to stints as regular penciller of Robin (1996–1999) and Catwoman (2000–2001). His most recent work for DC was the inter-company crossover Batman/Aliens IIlimited series in 2003.
In 2003 he returned to Marvel, and it is at that publisher that most of his work has since been published. At Marvel he has worked on Wolverine, New X-Men, Underworld, Cable & Deadpool, Civil War: War Crimes and it was also through Marvel he got his work on the Heroeswebcomics.
He is currently working on a 150-page Dracula comic and has produced The New World Order, a comic book series based on a line of Agent Provocateur lingerie.[2]