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