Vietnamese President To Lam was confirmed on Saturday as the new chief of the Communist Party after his predecessor died on July 19.
Mr Lam will be the general secretary of the Communist Party of Vietnam, the country’s most powerful political role, state media said.
It was unclear if Mr Lam will stay in his role as president.
The previous general secretary, Nguyen Phu Trong, dominated Vietnamese politics since he became party chief in 2011.
He was elected to a third term as general secretary in 2021.
He was an ideologue who viewed corruption as the gravest threat facing the party.
Mr Lam spent over four decades in the Ministry of Public Security before becoming the minister in 2016.
As Vietnam’s top security official, Mr Lam led Mr Trong’s sweeping anti-graft campaign until May, when he became president following the resignation of his predecessor, who stepped down after being caught by the campaign.