Interserve has won two contracts worth £62 million to build and refurbish facilities for the North West Wales NHS Trust.
The services, maintenance and building group will be the supply partner to replace corroded pipe work throughout Ysbyty Gwynedd Acute Hospital in Bangor. It will also refurbish facilities at the hospital.
Interserve will also construct a new Accident & Emergency department at Withybush Hospital Haverfordwest for the Hywel Dda NHS Trust.
Work will start in September and is due be completed by February 2010.
Interserve executive director John Vyse said: “These two prestigious projects further expand our extensive activities in the Welsh health sector.”