For more than 40 years, Twining has been signatory to an agreement with the International Union of Operating Engineers, Local 12 and we are proud that in 2020 our partnership with the Union expanded statewide to include Local 3. Due to the stability and benefits offered by our company, and the increased compensation paid to our inspectors and technicians, Twining attracts the very best personnel. Our inspection personnel are paid the prevailing wage as determined by the California Department of Labor, Director of Industrial Relations in accordance with Part 7, Chapter 1, Article 2, Sections 1770, 1773, and 1773.1 of the California Labor Code.

The field of nondestructive testing is undergoing rapid change, bringing technologies that had previously been the subject of research into the arena of practical application. Twining has been at the forefront of these applications, from participating in the post-Northridge SAC committees through being the first firm to fully implement the requirements of FEMA 353 and now AWS D1.8, to the field implementation of the latest technologies such as Phased Array Ultrasonics and Time of Flight Diffraction. Twining is fully compliant not only with ASNT SNT-TC1A, but with the stricter certification standards of CP-189.