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