Consultancy White Young Green has reported a sharp rise in profits and turnover for the first half to December boosted by last year's acquisitions.
The group also announced two more yesterday for a total cost of £2.6 million as it reported a rise in pretax profits for the six months in December from £2.4 million to £3.3 million.
It bought Southamptonbased waste management engineering consultancy Robert Long and Welsh town planning consultancy WynThomasGordonLewis.
The period saw the firm's Birmingham office expanded to incorporate the acquisition of the Solihull office of DWP Consulting, the Leicester/Birmingham based mechanical and electrical consultancy.
This increased the total staff employed in the Edgbaston base to 45 people, a figure which is expected to double again over the next three years.
Keith Ashford, director of the Birmingham office, said: "This has been a very exciting year and now we are relocating to a newer bigger office in the Jewellery Quarter."
Projects undertaken include the mechanical and electrical services design for the new construction college at South Birmingham College, and the £11.2 million Sportex Building at the University of Birmingham.
The company saw its turnover increase by 64 per cent to £65.83 million.