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