Team / Our people Meet Our Experts FilterIng by Service Civil & Transportation Engineering Construction Management Landscape Architecture Mechanical Engineering Public Works Administration and Permitting Surveying / GIS Solutions Water Resources Professional Support Services Our Principals Brad Brechwald, PE, PLS CEO, President Thomas Zehnder, PE Principal Jorge Aguilar, PE Principal Robert Miller, PE Principal Kari Wagner, PE Principal and Director of Water Resources Zach Markow, PE Civil Engineer Wen Bin Sullivan, PE Civil Engineer Mark Madonna, PE Survey Technician Glenn Rider Senior Environmental Compliance Specialist Lonnie Richardson Senior Project Analyst Bill Callahan Senior Environmental Compliance Specialist Greg Hulburd, PE, QSD/P Civil Engineer Alvaro Escobedo Associate Engineer Ann Sever, PLA 4038 Senior Landscape Architect Brett Hadley, PE, QSD/P Senior Civil Engineer Nick Sine, LSIT Survey Technician Luz Garcia, PLS Professional Land Surveyor Clayton Bradshaw, PE, PLS Director of Surveying Elvira Morla-Camacho, PE, QSD/P Senior Civil Engineer Conner Kelly, PE Associate Engineer Samar Saliba Accounting Bill Lindahl Senior Mechanical Engineer Erik Rutherford, PE Senior Mechanical Engineer Ralph Schell Senior Civil Designer Matt Valez Office Manager Kathy Redden Executive Assistant John Wallace, PE Consulting Engineer Paula Cappiello Senior Accountant Sarah Huffman, PE Civil Engineer Jenna Mitchell Human Resources Manager Gabriela Mendoza Marketing Coordinator Zachary Caipang, EIT Associate Engineer Michael Hausman, PE Civil Engineer Olivia Williams Associate Engineer Rachel Hawthorne, PE Director of Civil and Transportation Engineering Zachary Teske, PE Director of Construction Management Cris Disarufino Senior Civil Designer Nancie L. Adams, PE Senior Civil Engineer Steven Tanaka, PE, CSI, CCS Principal Civil Engineer Tim Peterson Project Analyst Compliance Inspector Craig A. Campbell, PE, PLS Consulting Engineer George Marchenko, PLS Senior Land Surveyor Tony Scalise Assistant Resident Engineer Bryce Dilger, PLS Senior Land Surveyor II Anthony Lehman Assistant Resident Engineer Matt Wilkins, PLA, ASLA, APA Director of Landscape Architecture Zac Powell, EIT Associate Engineer Travis Vasquez, PE Associate Engineer Nate Whitcare, PE Senior Designer Daniel Herrera Survey Technician I Suzanne Baird. PLA 6114 Landscape Architect Valerie Huff, PE Senior Civil Engineer Julie Rae Wilson Controller Alexandra Cass Associate Engineer Ethan Pence, PE Civil Engineer Ryan Burmaster Survey Technician Marco Castaneda, PLS Professional Land Surveyor Bryan Childress, PE Senior Mechanical Engineer Jenni Metzger Project Analyst Skye Thomas, PLS Senior Land Surveyor Josh Whipple Senior Mechanical Designer Want to make our communities better? Join Our Team More Of Our Projects