Mark Thomas provides planning, civil and structural engineering, construction management, land surveying, landscape architecture and urban design, and district management for local, regional, and state agencies. Focused on capital improvement projects, we develop context-sensitive solutions to improve our local communities. It’s not about simple connection, but creating a better way for all of us to Move Forward. Visit us at markthomas.com
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Mark Thomas Questions
The Mark Thomas annual revenue was $36.3 million in 2026.
Zach Siviglia is the President and CEO of Mark Thomas.
373 people are employed at Mark Thomas.
Mark Thomas is based in San Jose, California.
The NAICS codes for Mark Thomas are [812210, 54, 541, 81, 8122, 812, 81221].
The SIC codes for Mark Thomas are [87, 871].
Top Mark Thomas Employees
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Zach Siviglia
President and CEO at Mark Thomas
Sacramento, CA, US1 -
Kimberly Post
Chief Financial Officer at Mark Thomas
Boston, MA, US25+ -
Shawn O'Keefe
Executive Vice President + Principal at Mark Thomas
California, United States13 -
Yen Dau
Director of Finance and Accounting at Mark Thomas
San Jose, CA, US13 -
Chris Pinckney
Director of Innovation at Mark Thomas
Huntington Beach, CA, US35+ -
Malachi Bray
Marketing Director at Mark Thomas
Walnut, CA, US24 -
Sabine van der Sluis
Director of Operations at Mark Thomas
San Francisco, CA, US2 -
Ryan Bissegger
Director of Government Affairs at Mark Thomas
Sacramento, CA, US23 -
Annie Lucero
Director of Human Resources at Mark Thomas
Augusta, GA, US15 -
Ryan Abraham
Project Director at Mark Thomas
Littleton, CO, US13
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