Mannings has more than 100 employees and Waterman said that it has particularly strong infrastructure experience and well-established local partnerships.
The co-operation agreement is for a period of two years. It will enable both partners to share technical knowledge and to co-operate for the purpose of obtaining and executing project design and consulting services.
"This partnership offers a good opportunity for us to share our expertise,” said Waterman Group chief executive Nick Taylor. “We know the team at Mannings well and we are confident that our partnership will lead to exciting opportunities."