The Beacon Medical Group, which is due to build three co-located hospitals, has confirmed to RTÉ News that it has implemented redundancies and pay reviews for senior staff.
The group said that following a review of the current economic conditions, six head office staff have been let go and senior management had agreed to pay reviews.
BMG employs 550 staff and says there have been no redundancies at the Beacon Hospital or its other medical facilities.
In July 2005, Health Minister, Mary Harney unveiled her hospital co-location plan to free up 1,000 beds in public hospital beds, by transferring them to new private facilities to be built on public hospital grounds.
The locations chosen were Limerick, Waterford, Cork, Sligo and in Dublin at St James's, Beaumont, Tallaght and Connolly Hospitals.
The Beacon Medical Group won the HSE tenders to build three of the co-located hospitals at Beaumont, Cork and Limerick.
The groups' co-location projects are costed at around €850m and have already been delayed by planning appeals. No legally binding contracts to build any of the BMG co-located hospitals have yet been signed with the Health Service Executive.
