[1] Siddons began his career as a teenage roadie with the Doors while attending Cal State Long Beach and six months later was asked to be the manager of the band in 1968.
"[3] After Morrison's death, Siddons continued to manage the remaining members of the Doors as they released two albums and toured.
His character appears in Oliver Stone's movie The Doors, in which Josh Evans plays him.
He managed or co-managed acts including Crosby, Stills, and Nash; Poco, America, Van Morrison, Pat Benatar, Jerry Cantrell, Robert Palmer, John Klemmer and in more recent times was a co-founder of Core Entertainment.
Core Entertainment was a professional management firm representing Alice in Chains, another band which has dealt with the death of its front man, and others.