Meet Our Experts
Our Principals
Brad Brechwald, PE, PLS
CEO, President
Thomas Zehnder, PE
Principal
Jorge Aguilar, PE
Principal
Robert Miller, PE
Principal
Kari Wagner, PE
Principal and Director of Water Resources
Matt Valez
Office Manager
Tony Scalise
Assistant Resident Engineer
Sarah Huffman, PE
Civil Engineer
Zac Powell, EIT
Associate Engineer
Steven Tanaka, PE, CSI, CCS
Principal Civil Engineer
Marco Castaneda, PLS
Professional Land Surveyor
Samar Saliba
Accounting
Jenna Mitchell
Human Resources Manager
Josh Whipple
Senior Mechanical Designer
Valerie Huff, PE
Senior Civil Engineer
Glenn Rider
Senior Environmental Compliance Specialist
Nancie L. Adams, PE
Senior Civil Engineer
Julie Rae Wilson
Controller
Bill Lindahl
Senior Mechanical Engineer
Elvira Morla-Camacho, PE, QSD/P
Senior Civil Engineer
Alexandra Cass
Associate Engineer
Mark Madonna, PE
Survey Technician
Anthony Lehman
Assistant Resident Engineer
Gabriela Mendoza
Marketing Coordinator
Clayton Bradshaw, PE, PLS
Director of Surveying
Greg Hulburd, PE, QSD/P
Civil Engineer
Michael Hausman, PE
Civil Engineer
Bill Callahan
Senior Environmental Compliance Specialist
Tim Peterson
Project Analyst Compliance Inspector
Kathy Redden
Executive Assistant
Travis Vasquez, PE
Associate Engineer
Erik Rutherford, PE
Senior Mechanical Engineer
Rachel Hawthorne, PE
Director of Civil and Transportation Engineering
Wen Bin Sullivan, PE
Civil Engineer
Ethan Pence, PE
Civil Engineer
Nick Sine, LSIT
Survey Technician
Alvaro Escobedo
Associate Engineer
Bryan Childress, PE
Senior Mechanical Engineer
Paula Cappiello
Senior Accountant
Zachary Caipang, EIT
Associate Engineer
Zach Markow, PE
Civil Engineer
Bryce Dilger, PLS
Senior Land Surveyor II
Jenni Metzger
Project Analyst
Lonnie Richardson
Senior Project Analyst
Skye Thomas, PLS
Senior Land Surveyor
Ryan Burmaster
Survey Technician
Nate Whitcare, PE
Senior Designer
Conner Kelly, PE
Associate Engineer
Zachary Teske, PE
Director of Construction Management
Matt Wilkins, PLA, ASLA, APA
Director of Landscape Architecture
Daniel Herrera
Survey Technician I
George Marchenko, PLS
Senior Land Surveyor
John Wallace, PE
Consulting Engineer
Craig A. Campbell, PE, PLS
Consulting Engineer
Brett Hadley, PE, QSD/P
Senior Civil Engineer
Ralph Schell
Senior Civil Designer
Suzanne Baird. PLA 6114
Landscape Architect
Cris Disarufino
Senior Civil Designer
Ann Sever, PLA 4038
Senior Landscape Architect
Olivia Williams
Associate Engineer
Luz Garcia, PLS
Professional Land Surveyor
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