Twining is the most recognizable name in testing and inspection. It has been our core service for over 125 years, and while we have grown to encompass a multitude of other Engineering Consulting services, we take pride in being the preferred provider for special inspection and materials testing in the regions we serve.

Our team has the resources to staff every project with experienced and professional inspection personnel. These highly skilled men and women have been selected for their depth of knowledge and for their ability to work with clients to achieve maximum performance at minimum cost.

Our team currently consists of more than 150 inspectors throughout California, more than 80% of whom hold multiple inspection certifications in various aspects of construction.