He was one of the key figures in a gang smuggling hundreds of kilos of cocaine and heroin, the Met said.
Det Con David Lawn, who led the investigation, said the force was “committed to combat the sale of dangerous and illegal drugs which pose a threat to the public”.
He added: “The Met are deploying specialist resources to tackle drug criminality and make the capital a safer place to live.
“Baxter’s conviction sends out a strong message to those who seek to profit from illegal drug trade: you will be held accountable for your actions in front of the court.”