RSK Group

RSK Group is a privately held UK-based environmental, engineering and technical services group, comprising over 200 companies employing some 14,500 people and with turnover of £2.2bn in the year to April 2025. RSK Group was established in 1989 in Aberdeen by Alan Ryder, and has grown both organically and through an accelerating programme of acquisitions. Today based in Helsby in Cheshire, in 2021 it aimed to become Europe's largest privately owned environmental and engineering business with a £1 billion turnover and employing 10,000 people worldwide by 2025. RSK acquired over 70 businesses in six years from 2016. In the year to April 2021, RSK's turnover reached £350.5m, up from £274.8m the previous year, and made a pre-tax loss of £18.9m, having made interest payments to backers of £22.8m. In the year to April 2022, RSK made a fifth consecutive pre-tax loss, of £38.1m, on a turnover of £796m inflated due to its dozens of acquisitions. It made £39.9m in interest payments. In August 2023, RSK announced plans to raise £500m from sales of shares in the business. Supplementing around £500m from Ares Management, this would provide £1bn to fund further acquisitions. It aimed to raise headcount to 40,000 by 2030, expanding internationally in Australia, Europe, Asia, Latin America, Africa and the Middle East.