Ex-BBC Norfolk and former Radio Clyde broadcaster Michael Souter has been convicted of a campaign of sexual abuse against seven boys aged between 11 and 16 between 1979 and 1999.
Originally from Scotland, the broadcaster was first arrested by police in 1993 but because of a lack of evidence against him he continued abusing boys for another six years.
A Norwich Crown Court spokeswoman confirmed that Souter had been found guilty of 26 charges including indecent assault, indecency with a child, serious sexual offences, and seven counts of possessing indecent images of children.
He was remanded in custody.
Prosecutors described Souter, who was also involved in the Scouts and a social services youth mentoring scheme, as a "sexual deviant" who was obsessed with young boys in shorts and uniform.
During the trial, prosecutor Andrew Shaw told jurors that the 60-year-old, of Loddon, Norfolk, used his celebrity status to abuse society's most vulnerable.
In 2010, a man who was abused by Souter in the 1980s and 1990s reported the crimes to the police. The man also passed along the details of two other victims of abuse.
As a result, Souter was subsequently arrested once again in June 2011.
Souter, who had denied the offences saying that he was the victim of a conspiracy in which allegations against him were made up, worked as a producer and presenter in both commercial and BBC radio since the mid-1970s.
He had previously presented for Radio Clyde.
Since 1989 he has worked as a freelance broadcaster and had run a media relations consultancy.
Police said that Souter's catalogue of abuse began in 1979 when he worked at BBC Radio Norfolk.
Detectives said that during the 1980s and 1990s, Souter's abuse escalated as he took up senior positions within the community, including as a Scout leader. Two of the boys were "repeatedly abused" over five years, including being raped, police said.
Chris McCann, head of the CPS's complex casework unit for the East of England said: "Michael Souter is the classic example of the predatory paedophile who devoted most of his adult life to grooming and abusing young boys while maintaining a facade of the utmost respectability.
"All this was a smokescreen to hide his true intention: to become close to young boys so he could sexually abuse them, confident that his celebrity status would mean they would not be believed."
Judge Mark Lucraft warned Souter he faced "a long period of imprisonment" when he is sentenced on October 31.