US design and construction company AECOM Technology Corp. is to merge with UK infrastructure design firm Maunsell. The deal is subject to approval by Maunsell’s shareholder-employees. If it is approved, AECOM will exchange shares and cash for Maunsell’s stock. Maunsell and AECOM generate a yearly world revenue in excess of $1.5bn and employ over 11 000 people globally.