Meet Our Experts
Our Principals
Brad Brechwald, PE, PLS
CEO, President
Thomas Zehnder, PE
Principal, CFO
Jorge Aguilar, PE
Principal
Robert Miller, PE
Principal
Kari Wagner, PE
Principal, COO
Bryan Childress, PE
Principal and Director of Mechanical Engineering
Rachel Hawthorne, PE
Senior Civil Engineer
Frances Yu
Survey Technician
Brandon Puccini, PE
Civil Engineer
Jamie Platz, PE
Senior Civil Engineer
Marcus Jackson
Senior Program Manager
Tim Peterson
Project Analyst Compliance Inspector
Michael Hausman, PE
Civil Engineer
Zach Markow, PE
Civil Engineer
JB Barrera
Assistant Resident Engineer
Bill Lindahl, PE
Senior Mechanical Engineer
Zachary Teske, PE
Director of Construction Management
Zachary Caipang, PE
Associate Engineer
Alex Murray, PE
Civil Engineer
Wen Bin Sullivan, PE
Civil Engineer
Tony Scalise
Assistant Resident Engineer
Nick Sine, LSIT
Survey Technician
Valerie Huff, PE
Senior Civil Engineer
Suzanne Baird, PLA, ASLA
Landscape Architect
Steven Tanaka, PE, CSI, CCS
Principal Civil Engineer
Ethan Pence, PE
Civil Engineer
Samar Saliba
Senior Accountant
Zac Powell, PE
Associate Engineer
Jamie Rogers
Marketing Coordinator
Anthony Lehman
Assistant Resident Engineer
Gabriela Mendoza
Accountant
Sonil Kim
Assistant Resident Engineer
Erik Rutherford, PE
Senior Mechanical Engineer
Glenn Rider
Senior Environmental Compliance Specialist
Nate Whitcare, PE
Senior Designer
Alexandra Cass, PE
Civil Engineer
Jessica Escobar, PLA
Landscape Architect
Ralph Schell
Senior Civil Designer
Olivia Williams, PE
Civil Engineer
Luz Garcia, PLS
Professional Land Surveyor
John Wallace, PE
Consulting Engineer
Matt Wilkins, PLA, ASLA, APA
Director of Landscape Architecture
Cris Disarufino
Senior Civil Designer
Tina Mayer, PE
Principal Civil Engineer
Greg Hulburd, PE, QSD/P
Director of Water Resources
Michael Osborn
Director of Civil and Transportation Engineering
Matt Valez
Operations Manager
Marilynn Connell
Landscape Designer
Kathy Redden
Executive Assistant
Bill Callahan
Senior Environmental Compliance Specialist
Lani Sarom
Landscape Designer
Lee Faraca, PE
Civil Engineer
Marco Castaneda, PLS
Professional Land Surveyor
Lonnie Richardson
Senior Project Analyst
Alvaro Escobedo
Associate Engineer
Mark Madonna, PE
Survey Technician
David Jamesson, PLA
Landscape Architect
Jenna Mitchell
Human Resources Manager
Sarah Huffman, PE
Senior Civil Engineer
Jorge Avila
Assistant Resident Engineer
Conner Kelly, PE
Associate Engineer
Paula Cappiello
Senior Accountant
Bryce Dilger, PLS
Senior Land Surveyor II
Heather Johnson
Reception & Admin
Clayton Bradshaw, PE, PLS
Director of Surveying
Julie Rae Wilson
Controller
Josh Whipple
Senior Mechanical Designer
George Marchenko, PLS
Senior Land Surveyor
Jenni Metzger
Project Analyst
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