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