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