Born Paul Sanson, his first band was a local Kent based group called 'The Innocence' which consisted of him, Stuart Cochrane, Phil Stranders and the late Martin Kirrage. After a period in several obscure bands, Samson formed his own eponymous outfit, Samson, in 1977, consisting of Chris Aylmer on bass guitar, and Clive Burr on drums. Burr left, and eventually joined Iron Maiden, and was replaced by Thunderstick, who wore a gimp mask on stage. In 1979, the line-up was expanded to a four-piece, with the addition of Bruce Dickinson on vocals (with the stage name "Bruce Bruce").
The band enjoyed a cult following in the new wave of British heavy metal, releasing the albums, Survivors, Head On and Shock Tactics, until 1981 when both Thunderstick and Dickinson left, the latter to join Iron Maiden.
Nicky Moore was recruited as a replacement, and Mel Gaynor then Pete Jupp took over drums, and this line-up released Before the Storm and Don't Get Mad - Get Even. These two albums sold in higher quantities than the first three, and the band toured more countries and played to bigger audiences than the Bruce/Thunderstick line-up, although the New Wave of British Heavy Metal was by now said to be a spent force. The band formally split up in 1984.
Samson spent the subsequent years in a variety of solo and group projects, including various temporary reformations of Samson, and had success as a record producer, and also as a blues player, spending a year in Chicago, Illinois, United States. Despite some listings crediting Samson for playing on the Ram Jam 1977 hit single, "Black Betty", he did not play on the record.