Mark Thomas opened his practice in San Jose in 1927, single-handedly offering civil engineering and land surveying, supporting land development projects. From 1927 until after World War II, Thomas maintained a solo practice; in 1947 he hired Aldo Savio as a partner, beginning the company’s steady growth.

As our team grew and evolved, so did our markets served. We expanded from land development and municipal work into transportation design in the 1980s. We were the first consultant allowed to design improvements to Caltrans facilities, with the I-880 Widening project in Santa Clara County in 1987. Since that time, we have completed hundreds of Caltrans improvement projects throughout the State, including designing California’s first Diverging Diamond Interchange (DDI), constructed in 2020.

We continue to grow and evolve, adding services and increasing our geographic reach, to meet the needs of our clients and communities throughout California.