The Clwyd West MP has been appointed minister of state at the Department for Exiting the European Union.
He led the Welsh arm of the Vote Leave campaign for the EU referendum.
Following the appointment, Mr Jones tweeted saying he was "honoured".
Elsewhere, Guto Bebb and the former leader of the Welsh Conservatives Lord Bourne have retained their junior ministerial positions in the Wales Office.
Former Welsh Secretary David Jones has been handed a role in Britain's exit from the EU as new Prime Minister Theresa May continues to shape her administration.