Porr has announced that Flughafen München has appointed it to extend an existing railway tunnel by 1.8km as part of plans to improve the airport.
Porr has said that the project is valued at €110M (£xxM) and will be delivered by its German subsidiary Stump Spezialtiefbau.
According to Porr CEO Karl-Heinz Strauss, the company won the work through offering an alternative design to deliver significant savings over the original plan.
The tunnel will mainly be built using cut and cover techniques but the challenge on the scheme is the timescale to build the 250m section within the eastern area of the airfield. This section must be built and the airfield returned to operation within nine months.
Current rail connections from the airport connect to the Erdinger Ringschluss to the west and the new tunnel will add connections to the north.
Completion of the work is expected in 2021.