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
Craig A. Campbell, PE, PLS
Principal
Nick Sine, LSIT
Survey Technician
Glenn Rider
Senior Environmental Compliance Specialist
George Marchenko, PLS
Senior Land Surveyor
Greg Hulburd, PE, QSD/P
Civil Engineer
Cris Disarufino
Senior Civil Designer
Tony Scalise
Assistant Resident Engineer
Chris Gardner
Business Development/Marketing Manager
Jenna Mitchell
Human Resources Manager
Rick Riedl, PE
Prinicipal Engineer
Valerie Huff, PE
Senior Civil Engineer
Nate Whitcare, PE
Senior Designer
Louis Lefebvre, PE
Senior Mechanical Designer
Erik Rutherford, PE
Senior Mechanical Engineer
Bill Callahan
Senior Environmental Compliance Specialist
Suzanne Baird. PLA 6114
Landscape Architect
Paula Richardson
Senior Accountant
Andrea Kingsbury, PE
Civil Engineer
Bryce Dilger, PLS
Senior Land Surveyor II
Elvira Morla-Camacho, PE, QSD/P
Senior Civil Engineer
Jenni Metzger
Project Analyst
Alexandra Cass
Associate Engineer
Ben Q. Parcasio
Senior Construction Inspector
Brett Hadley, PE, QSD/P
Senior Civil Engineer
Matt Valez
Office Manager
Ethan Pence, EIT
Associate Engineer
Ann Sever, PLA 4038
Senior Landscape Architect
Zac Powell, EIT
Associate Engineer
Steven Tanaka, PE, CSI, CCS
Principal Civil Engineer
Josh Whipple
Senior Mechanical Designer
Rachel Hawthorne, PE
Director of Civil and Transportation Engineering
Esau Blanco, PE, QSD/P
Senior Civil Engineer
Ryan Burmaster
Survey Technician
Kathy Redden
Executive Assistant
Lonnie Richardson
Senior Project Analyst
Gabriela Mendoza
Marketing Coordinator
Kylie Castle
Marketing Coordinator
Anthony Lehman
Assistant Resident Engineer
Travis Vasquez, EIT
Associate Engineer
Zachary Teske, PE
Director of Construction Management
Bill Lindahl
Senior Mechanical Engineer
Mark Madonna, PE
Survey Technician
Clayton Bradshaw, PE, PLS
Director of Surveying
Julie Rae Wilson
Controller
Luz Garcia, PLS
Professional Land Surveyor
Marco Castaneda, PLS
Professional Land Surveyor
Sarah Huffman, PE
Civil Engineer
Bryan Childress, PE
Senior Mechanical Engineer
Conner Kelly, EIT
Associate Engineer
Michael Hausman, PE
Civil Engineer
Skye Thomas, PLS
Senior Land Surveyor
Ralph Schell
Senior Civil Designer
Zachary Caipang, EIT
Associate Engineer
John Wallace, PE
Consulting Engineer
Wen Bin Sullivan, EIT
Associate Engineer
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