The latest deals see the acquisition of CR Civil Engineering Ltd, the Enviresearch group and E.D.P. Health, Safety and Environment Consultants Ltd (EDP).

CR Civil Engineering provides groundwork civil engineering services to the highways, rail and other sectors.

It counts Tier 1 contractors such as A-one+, Galliford Try, Morgan Sindall, BAM Nuttall, Amey, Osborne, Winvic and nmcn among its client base.

CR Civil Engineering employs more than 200 people directly and has a turnover approaching £40m.

Enviresearch is a leading regulatory and risk assessment services provider to the global chemical industry while EDP helps businesses of all sizes to manage their health, safety, environmental and sustainability duties.

The acquisitions will see all three businesses moving forward, with their existing leadership, workforce, strategy and brands still in place, as they join the growing RSK group.

Alan Ryder, RSK Founder and Chief Executive Officer, said: “I am delighted that these three leading companies are joining forces with RSK.

“Work on large infrastructure projects is a particularly buoyant market and CR Civil Engineering is a fantastic addition to our contracting division.

“We anticipate many synergies with businesses across the RSK group in associated work areas such as traffic management, earthworks, in-situ testing and slope stabilisation.

“This is a hugely exciting time for RSK as we continue to grow and diversify the business by ensuring we can deliver practical end-to-end solutions for our clients and make positive contributions to society as we move towards a more sustainable future.”

Carl Roberts, Managing Director, CR Civil Engineering, added: “Being part of RSK will not only strengthen the company, it will also offer opportunities for CR Civil Engineering to develop and will enable our dedicated staff to thrive within a growing organisation and thus to reach their potential.”