Roadbridge, SIAC Butler Steel and Mercury Engineering are all set to benefit from the deal.
The contracts will cover civil works, structural steel works, mechanical engineering works, as well as electrical and instrumentation requirements.
Deputy managing director of Shell E&P Ireland, Terry Nolan, said the tender process was intensely competitive and demonstrated the “excellent capability” of Irish construction companies.
“The eventual contracts to Irish companies will not only benefit the Irish economy generally but will also have significant benefits for the western region and the Erris area,” he said.
“It is a specific focus of each contract that local spend be maximised in all possible areas, including the sourcing of supplies and the hiring of labour.
“This will result in a very significant spend of €76m, including an investment of €10m in Erris, and over €14m in Mayo.”
Mercury Engineering has been appointed as the contractor for the mechanical works, including piping and equipment installation. The company has also been appointed as contractor for the electrical and instrumentation systems at the Bellanboy facility.
Roadbridge Ltd has been appointed contractor for construction of the terminal including the laying of foundations, a new access road to the site for construction traffic, and general civil works including drainage works.
SIAC Butler Steel Ltd has won the contract for the structural steel work for the terminal building.
The Corrib Natural Gas Field lies some 83km off the north west coast of Ireland, approximately 3,000 metres under the seabed.