The new Environment Commissioner is David Pace while Charles Messina is Health Commissioner.
They are the first to occupy such posts in the the ombudsman's office.
The appointment of the Mr Pace has been surrounded by controversy as he will be replacing Joe Falzon, Mepa's audit officer.
Ombudsman Joseph Said Pullicino gave a breakdown of the appointment process.
While there was agreement between the Prime Minister and the leader of the Opposition on Mr Messina's appointment, he had not received a name for Environment Commissioner within the statutory period.
He indicated that Mr Falzon had expressed his wish not to be appointed Environment Commissioner.
Other names had been discussed between the Prime Minister and the Opposition leader but no agreement was reached.
This meant that the onus fell on him to appoint the person.
Dr Said Pullicino said that the two commissioners were independent and the Environment Commissioner would have more clout than the Mepa auditor used to have because his reports would automatically be referred to Parliament.
The commissioners also had the power to request files and could order arrests if such files were not made available.
The Ombudsman also paid homage to Mr Falzon's work. He said he worked a lot and had achieved positive results. Dr Said Pullicino also insisted that he informed Mr Falzon of the developments as early as he could.
The changes to the law that set up the two new posts were approved by Parliament at the end of 2010. When asked why it took so long for the two commissioners to be appointed, Dr Said Pullicino said he wanted to make sure that the Ombudsman's office had the right facilities.
It was only now that the building next to the current office was vacated and handed over to his office to create more space.
Who are they?
Environment Commissioner DAVID PACE is an architect who graduated from the university in 1971. He has been engaged in private practice and for a time was also a member of the Development Control Commission at the Planning Authority. He was also involved in the Mepa reform.
Health Commissioner CHARLES MESSINA had a very long career in the civil service and was mainly involved in the organisation and management of the government health service, including the administration of St Luke's Hospital. He also served for some years as a member of the Medical Council and chairman of the Hospital Management Committee of St Vincent de Paul residence.