Kier has been awarded a £125m tunnelling contract in Hong Kong as part of a three-way joint venture.
The project is part of the Hong Kong section of the Guangzhou-Shenzhen-Hong Kong Express Rail Link connecting mainland China and Hong Kong.
Kier hold a 50 per cent share in the joint venture that also includes Spanish contractor Obras Subterraneas SA and Hong Kong based contractor Kaden Construction.
Works will include the sinking of two deep shafts and two 2.6km long, 7.5m wide railway tunnels which will be constructed by drilling and blasting through hard rock.
Construction is expected to start immediately and completion is scheduled for May 2015.