Kier has sold Mouchel Consulting to WSP Global, 16 months after the business transferred as part of Mouchel’s acquisition.
The contractor announced in July it was considering the sale of the business, which provides engineering, environmental and asset management consultancy services, principally to infrastructure markets.
WSP has bought the business for £75m in cash.
For the financial year to 30 June 2016, Mouchel Consulting had revenue of £125m and a pre-tax profit of £5m.
It had gross assets of £29m at 30 June 2016.
Kier said the disposal would generate an immediate profit of around £40m which would be retained by Kier for future investment purposes and to further reduce debt.
Kier chief executive Haydn Mursell said: “Having completed the integration of Mouchel, we are well progressed with the simplification of our portfolio of businesses.
“The disposal of Mouchel Consulting continues this process and provides increased capital to focus on the opportunities across our core businesses which will underpin the group’s future growth.”