Founded in 2006, Travis Baker has a 40-plus team working across two offices in Birmingham and Nottingham with an annual turnover of £4.5m.
Rob Travis, Dave Baker, Dave James and Ted Wake will continue to lead the business as directors.
Travis Baker’s longstanding clients include Redrow, Bloor Homes, Barratt Homes, Persimmon, Taylor Wimpey, Miller Homes, Bellway and Keepmoat Homes.
RSK Group CEO Alan Ryder said: “High-quality skills are sought after in the civil, structural, and geo-environmental sectors, and the addition of Travis Baker will complement our services in these sectors alongside architecture, topography, noise and transport planning.
“There is also a clear synergy in the water sector alongside our many businesses operating in this space. This cross-business support is something RSK is keen to explore further with Travis Baker.”
Ryder has now collected more than 175 firms, employing 10,000 people.
The group’s annual turnover at the end of this year is expected to top £800m, more than double the previous year.