Dragos Damian has been charged with conspiracy to assist unlawful immigration and encouraging or assisting the commission of an offence, the force said.
The action was taken under an international arrest warrant.
Essex Police said officers are awaiting details of a court appearance in Italy.
The bodies of the Vietnamese nationals were discovered at an industrial estate in Grays shortly after the container arrived on a ferry from Zeebrugge in Belgium in the early hours of October 23rd, 2019. Four Northern Irish men were sentenced in connection with the deaths last year.
Among the men, women and children were 10 teenagers, two of them 15-year-old boys. – PA