Jama Ahmed, of Broomhall Place, Sheffield was jailed after being found guilty by a majority verdict of murdering Mr Thomas in a shooting on Derek Dooley Way, on December 21, last year.
The 26-year-old was also found guilty of attempting to murder Mr Thomas’ friend, Neshaun Ferguson, following a seven-week trial at Sheffield Crown Court.
Passing sentence Mr Justice Green, told Ahmed he cannot be certain of he was the shooter.
He said: “I’m clear you were in the car and were intent on participating fully in this cold-blooded execution.”
He added: “Most of your associates have fled the country to evade justice.”
Justice Green said Ahmed was a ‘sophisticated drug dealer and part of a close-knit group of dealers from the Somali community.’
Ahmed shouted ‘Allahu Akbar’ and ‘Talk is cheap’ as he was led from the dock inside the courtroom.
There was also a brief disturbance in court as Ahmed’s associates left the public gallery.
A second man, Asif Yousaf, of Violet Bank Road, was cleared of murder and attempted murder, also by a majority verdict.
The 33-year-old had accepted driving the car used in the murder, but said he had not been inside during the killing.
Justice Green said Yousaf was a drug addict and an ‘innocent dupe’ in the plot to buy the car used in the murder.
Mohammed Yousaf, 61, also of Violet Bank Road, was found guilty of perverting the course of justice and handed a suspended two-year prison sentence.
Jordan, from Firshill, Sheffield, was a passenger in a silver Ford Mondeo when the car was shot at while stationary in Derek Dooley Way at around 10.10pm.
He suffered two gunshot wounds and was taken to hospital, but died a short time later from his injuries.
Mr Ferguson, the 28-year-old driver of the Mondeo, was shot once but survived the attack.