The announcement was supposed to be on Monday but documents are yet to be finalised.
Last Friday, a few MPs from Pangu Pati were sworn in as vice ministers, including party leader Sam Basil, who was sworn in as a minister without a portfolio.
O’Neill, who was at the Government House to witness the swearing-in ceremony, said the leader of Pangu Pati brings a wealth of experience to Cabinet.
“I welcome Minister Basil to Cabinet, and the appointment of two new vice ministers, who I know will all make a valuable contribution to the development and implementation of Government policy,” he said.
“We will do a reshuffle of ministries, and this is a natural part of ensuring we get the best outcomes for the departments and agencies for which we are responsible.”