Gary McKinnon, the computer hacker who was the subject of a 10-year legal battle over US extradition, has reinvented himself as a search expert.
Mr McKinnon launched Small SEO, a site where he charges £40 an hour to help businesses get mentioned in search results.
On his site, he says he has more than 20 years' experience in IT services.
He had hacked US government computers but his extradition to face charges there was blocked.
The story was first reported in the Sunday Times. Search engine optimisation, or SEO, is a strategy to make sure a website or web page appears prominently in Google and other search engine results.
On his website, he says: "My aim is to provide high-quality SEO to small businesses and individuals. All of my clients have so far reached the first page of Google search results for their primary keywords."
Some of the clients in his portfolio include law firm Kaim Todner, tutoring service GMAT Tutor London, and Jamm, "home of the egg roller and the child-safety door stop".
Mr McKinnon was contacted by the BBC, but declined to speak because of a prior agreement with the Daily Mail. He confirmed there were no restrictions on his ability to use computers.