Father Harris was ordained on Wednesday at the Cathedral of the Immaculate Conception, Independence Square, Port of Spain.
He will replace outgoing Archbishop of Port of Spain, Edward Gilbert, who will retire in December this year.
In a News Power Authority interview this afternoon, I.R.O. President, Emrold Gould wished Mr. Harris success in the leadership position.
Mr. Gould also said the religious movement continues to do its part in addressing many of the social challenges affecting the nation.