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