Raymond began his musical career as a keyboardist/vocalist for the band, Plastic Penny, in 1967. He left after the band split up in 1968. He replaced Christine Perfect (later to become Christine McVie) in British blues band Chicken Shack when she left to join Fleetwood Mac. Raymond then joined Savoy Brown as their keyboardist/guitarist. He subsequently recorded with the former Fleetwood Mac guitarist Danny Kirwan.
He was recruited by UFO in 1976 to replace their first keyboardist, Danny Peyronel. He wrote songs for UFO but because of a previous publishing deal was not credited for these songs until recent years. When Michael Schenker left UFO, he joined Schenker's own band, MSG, in 1981 and later joined UFO bassist Pete Way's own band, Waysted, in 1983. Raymond worked with Phil Mogg, Andy Parker, along with Schenker and Way, in UFO from 1976– 1981, 1984–1986, 1993–1998 and 2003–present date.
Raymond is left handed and plays guitar with the strings inverted.