TEC is a permanent joint venture partnership between leading international engineering consultants Royal HaskoningDHV and Witteveen+Bos. These two organisations are experts in their own right, particularly relating to large underground projects. The creation of TEC brings together their combined knowledge, expertise and experience.

The objective of the partnership is to combine the knowledge, expertise and experience of both parent companies in the field of underground infrastructure.
A permanent partnership guarantees the continuity essential for maintaining wide-ranging and specialised knowledge required in the field of tunnel construction for roads and railways.