Environmental and engineering services company RSK has merged with RSKW and acquired CJ Associates and Up and Under Group.
RSK secured a £140M funding package with Permira Debt Managers in 2017 to include about 10 acquisitions for the group.
The latest acquisitions and merger will see the business and employees of all three companies transfer to RSK, bringing staff numbers up to 2100 in 82 offices worldwide.
RSK Group chief executive officer Alan Ryder said: “I am delighted that these three leading companies are joining forces with RSK.
“It means RSK continues to increase its footprint as one of the biggest environmental consultancies in the UK. It also adds to RSK’s current capabilities and will provide additional layers of skills to the organisation to the benefit of all our clients.”
Bristol-based geotechnical engineering firm CJ Associates operates the soil sampling equipment and techniques and clients include Arup, Balfour Beatty and Wessex Water.
Crewe-based Up and Under Group provides inspections, surveys, repair and maintenance services.
RSK has had a small minority stake in RSKW for 10 years and the two companies have now merged on a 100% basis.
RSKW has bases in Minety, Wiltshire and Stirling, Scotland and provides management and technical consultancy solutions to the utilities, energy, transport and industrial sectors.
All three businesses will continue to operate under their existing brands and management.
The latest deals follow RSK’s acquisition of acoustics, noise and vibration consultancy Cole Jarman and site investigation services firm Ian Farmer Associates in November last year.