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Siegfried has been built on the dedication, creativity, and expertise of our incredible team. Our success is driven by our people—past and present—whose hard work and passion continue to define Siegfried. Together, we look forward to the future, building on our legacy and creating lasting change in the communities we serve.

Our Leaders

Northern California Civil Engineering Firm
Paul Schneider
PE, QSD/QSP
President, Managing Principal
Adam Merrill Portrait
Adam Merrill
PE, QSD/QSP
Vice President, Principal
Civil Engineering Structural Surveying Northern California
Jim Willis
CFO, General Manager
Land Surveyor Northern California Sacramento
Kevin Genasci
PLS
Survey Manager, Principal
Bradford Quon
PE, GE
Geotechnical Manager, Principal
Jori Lemmon
PE, SE
Structural Manager, Principal
Thais Del Castillo
PLA, LEED AP
Landscape Manager, Principal
Landscape Architecture Sacramento Bay Area San Jose
Robert Norbutas Jr.
PLA
Design Principal
Structural Engineering Firm Sacramento San Francisco Modesto CA
Anthony LopeS
PE, SE
Senior Associate Structural Engineer
Northern California Civil Engineering Sacramento Modesto
Nathan Berend
PE
Associate Civil Engineer
Civil Engineering Surveying Modesto Stockton Sacramento Bay Area
Rhett Kilgore
PE
Associate Civil Engineer
Zia Durrani
PE, SE
Associate Structural Engineer
Louie Mendez Portrait
Louie Mendez
Associate Project Manager
Lorraine Cayllahua
PE
Associate Civil Engineer
Shawn Barba
Marketing Director
Erin Cahoon
Marketing Manager

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Siegfried Engineering