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RSK expands its GI business with Central Alliance acquisition

RSK has announced that it has bought out Yorkshire-based preconstruction services specialist Central Alliance.

The acquisition is the latest in a string of takeovers funded through a £140M investment package from Permira Debt Managers.

Bringing Central Alliance’s ground investigation, geo-construction, training, technology and survey services business into RSK takes the company’s headcount to 2,100 spread between 83 offices worldwide.

“I am delighted that RSK has been able to acquire Central Alliance,” said RSK CEO Alan Ryder. “It is a great business with great people and great clients. Our plan is to invest in the company and to help it grow.

“RSK now has over 100 drilling rigs with an equal number of trained crews, in-house laboratories and more site investigation capability than its rivals do. Whether it is a simple investigation for a single house, working on railway embankments using specialist slope-crawler rigs or investigating ground conditions for a new nuclear power station, RSK brings in top-quality people, with top-quality equipment, using innovative techniques.”

According to Central Alliance joint managing director Craig White, there are great synergies between our companies in ground investigation and surveying.

Other recent acquisitions have seen two other ground investigation businesses – Ian Farmer Associates and CJ Associates – join RSK.


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