(4-traders.com) ARCADIS, one of the world's leading natural and built asset design and consultancy firms, said it has completed the acquisition of two major construction players in the region, Hyder Consulting and Callison. Hyder Consulting is a leader in infrastructure, water and buildings sector with activities in the UK, the Middle East, Germany, Asia and...http://www.4-traders.com/ARCADIS-6328/news/Arcadis--acquires-two-companies-19512910/