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