Cennamo left school at 16 and undertook his earliest important musical project (1962–65) as a founding member of the popular London-based
blues/rock band,
Jimmy Powell and the Five Dimensions (a band that also included
Rod Stewart). They signed a recording deal with
Pye Records and released "That's Alright" (written by Powell) as a single in June 1964, and were also hired to provide backing for
Jamaican singer
Millie Small on her recording of "
My Boy Lollipop" (which was a No. 2 hit in both the UK and the US, selling upwards of six million copies). In June 1964, The 5 Dimensions appeared on the bill at the
All Night Rave at the Alexandra Palace with headlining act
The Rolling Stones (as well as
Alexis Korner,
John Lee Hooker and
John Mayall & the Bluesbreakers), and they further galvanized their place in
rock and roll history with performances on
Granada TV (with
Sonny Boy Williamson and
Sister Rosetta Tharpe),
Ready Steady Go! and
Thank Your Lucky Stars. In 1965, the band was asked to back up
Chuck Berry on both his
Chuck Berry in London LP and on his three-week tour of England. Upon leaving the band, Cennamo spent late 1965 to late 1966 as the bass guitarist for
The Herd (with
Peter Frampton). Cennamo's sole released recording with the band was a cover of a
Mick Jagger/
Keith Richards song, "So Much In Love" (b/w "This Boy's Always Been True") on the
Parlophone Records label. Upon leaving The Herd, Cennamo played briefly with
Tim Hinkley,
Viv Prince and
Mike Patto in the group Patto's People (née Chicago Blue Line) - recording and releasing one single, "Shimmy Shimmy Ko Ko Bop" / "Jump Back", in late 1966. During the late 1960s, Cennamo also played bass on several recording sessions. Some well documented projects included
James Taylor's 1968 self-titled LP and
Al Stewart's
Zero She Flies. In 1969, along with
Keith Relf and
Jim McCarty (formerly of
The Yardbirds), Cennamo co-founded the original lineup of the progressive rock band
Renaissance. Cennamo played a key role in working up the band's classically influenced song arrangements, and one highlight of Renaissance live performances through this era was his use of the violin bow on his bass on the song "Bullet", which was often the final number of the set. He would continue to use the violin bow on his bass with later bands, on certain numbers. This incarnation of the band recorded two LPs, but a busy touring schedule began to wear on members of the band, and they decided to go their separate ways in the spring of 1970. Cennamo then began recording and performing with British jazz-rock band
Colosseum. It was during Cennamo's involvement that Colosseum recorded
Daughter of Time (1970). Cennamo was then recruited by progressive/blues/rock band
Steamhammer (1970–72). The band subsequently toured Europe extensively, and recorded the experimental
Speech in 1971. After Steamhammer folded in 1973, Cenammo co-founded
Armageddon (1974–75) with American
drummer Bobby Caldwell, Steamhammer guitarist
Martin Pugh, and "Speech" co-producer (and former Renaissance bandmate) Keith Relf. The band was based in California, but recorded their debut album,
Armageddon, at
Olympic Studios in London. It was released on
A&M Records in the late spring of 1975. Relf's death (by electrocution) in May 1976 effectively ended the band. Back in England after Armageddon's dissolution, Cennamo then co-founded
Illusion with the members of the original Renaissance (minus the late Keith Relf), remaining with the band for two albums (from 1977 to 1979). ==1980s and beyond==