The firm, which now generates over 80% of its revenue from the UK, said workloads in London and the regions has continued to grow over the first three months of its financial year.
In a trading statement the firm said: “To meet this demand we have reinforced our recruitment activity which has resulted in a 5% increase in engineers and environmental consultants since July.”
Waterman said the London property market continued to remain buoyant.
“We are now also experiencing increasing activity from residential and retail developers with schemes being considered in regions throughout the UK.”
The four-year West Midlands Highways Alliance Framework, which Waterman won in the summer, has contributed to a 28% growth since the beginning of the year in civil engineers on secondment to Borough and City councils, which now totals 272 staff.