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