The contracts included a housing project in Greenock as well as work at Glasgow's Southern General and construction of Network Rail office accommodation in Irvine.
In Greenock, the Glasgow-based firm - part of the McKean Group - carried out a £1.5million job installing foundations and a sewerage system as well as carrying out groundwork at a social housing project.
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McKean & Co also carried out £150,000 of work at the city's Southern General hospital, laying foundations for a network of modular buildings and installing a drainage system for them.
Meanwhile, in Irvine, the firm also completed a £650,000 project which involved the construction of a two-storey modular building with office and kitchen facilities; construction of a one storey modular building for storage; and the creation of a new car park, access roads, concrete storage yards and drainage systems.
Mark Fallon, Managing Director of McKean & Co, said: "We are delighted to hand over these projects to Rok, for whom we have worked on a number of occasions.
"Repeat business of this kind is always most welcome and shows that if we continue to demonstrate excellence in our work and ensure client satisfaction, they will come back us."
(GK/KMcA)
