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