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