35-year-old Darryl Caffrey of Cherrypark, River Valley Swords, pleaded guilty to committing an offence for a criminal organisation by attempting to steal €1.25 million in January 2007.
He is already serving another three-year sentence for giving information to a different criminal gang which then committed an attempted robbery in Celbridge in November 2007.
Judge Catherine Delahunt said the cruelty of the attack on his friends was outstanding.
Caffrey gave the gang information about colleagues he lived and worked with and two of them were subsequently abducted, beaten and tied up at gunpoint while Caffrey went to work and tried to steal the money.
He pretended he too was a victim of the gang but admitted his role when he was arrested by the Organised Crime Unit.
Caffrey worked for Chubb for six years and claimed he got involved with the criminal gangs because of stupidity and greed.
