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