1927
Mark Thomas founded the firm in San Jose as a sole practitioner civil engineer/land surveyor, focused on land development projects.
Always Moving Forward.
A message from our CEO
“As we approach our 100th anniversary, I'm proud that we have continued to deliver on the philosophy of our founder, Mark Thomas: "the beginning is the most important part of the work." As we have evolved over the last century, we remain focused on first understanding the context, drivers, and goals of every project we deliver, regardless of size.”
Zach Siviglia, PE, QSD
President + Chief Executive Officer
1947
Mark Thomas brought on a partner, Aldo Savio, and the firm became Mark Thomas & Company.
1950s
The company added three additional Principals and support staff. In 1959, the firm incorporates and becomes Mark Thomas & Company, Inc.
1980s
The company expanded from land development and municipal work into transportation design.
1987
We were the first consultant allowed to design improvements to Caltrans facilities, with the I-880 Widening project in Santa Clara County.
1990s
We expanded beyond San Jose, with the opening of Sacramento, Walnut Creek, and Pleasanton offices.
2000s
We continued our expansion in Northern California, opening a Fresno office.
2010s
As our staff size grew, so did our geographic reach. We opened Irvine, Inland Empire, Long Beach, and Roseville offices.
2020
Mark Thomas’ designed California’s first Diverging Diamond Interchange (DDI) at SR 120/Union Road in Manteca, which opened in 2020.
2020s
We expanded our Southern California reach with the opening of a downtown Los Angeles office.