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