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