The latest results from WS Atkins show revenue up 11.8% to £2.08bn, ahead of its takeover by SNC-Lavalin next month.
The figures, for the year to 31 March 2017, show underlying profit before tax up 18.4% to £164.6M compared to the year before.
In the UK and Europe, there is a 9.9% operating margin.
There has been growth in North America fuelled by major projects, but the Middle East has seen “challenging markets”. Atkins has won a contract with the US Army Corps of Engineers (USACE) Middle East District to work on infrastructure projects across the Middle East.
“We delivered a strong set of results this year with underlying profit before tax improving by 18.4% to £164.6m. Our underlying operating margin continued to improve and we delivered revenue growth on a constant currency basis of 4.3%, underpinned by the acquisition of PP&T in 2016. We believe that the Group is in a strong position to execute on its growth strategy going forward,” said a joint statement by chairman Allan Cook and chief executive Uwe Krueger.