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 Bryan Childress, PE Principal and Director of Mechanical Engineering Anthony Lehman Assistant Resident Engineer Olivia Williams Associate Engineer Travis Vasquez, PE Associate Engineer Josh Whipple Senior Mechanical Designer Bria diCicco Marketing & Business Development Manager Tony Scalise Assistant Resident Engineer Samar Saliba Senior Accountant Heather Johnson Reception & Admin Zac Powell, PE Associate Engineer Ryan Burmaster Survey Technician Valerie Huff, PE Senior Civil Engineer Sarah Huffman, PE Civil Engineer Michael Hausman, PE Civil Engineer Kathy Redden Executive Assistant Sonil Kim Assistant Resident Engineer Nick Sine, LSIT Survey Technician Tina Mayer, PE Principal Civil Engineer Luz Garcia, PLS Professional Land Surveyor Paula Cappiello Senior Accountant Ann Sever, PLA Senior Landscape Architect Steven Tanaka, PE, CSI, CCS Principal Civil Engineer Glenn Rider Senior Environmental Compliance Specialist Ioanna Bruno Landscape Designer Alex Murray, PE Civil Engineer Matt Valez Office Manager Bill Callahan Senior Environmental Compliance Specialist Rachel Hawthorne, PE Director of Civil and Transportation Engineering Zachary Teske, PE Director of Construction Management Marilynn Connell Landscape Designer Cris Disarufino Senior Civil Designer Ralph Schell Senior Civil Designer Nate Whitcare, PE Senior Designer Matt Wilkins, PLA, ASLA, APA Director of Landscape Architecture John Wallace, PE Consulting Engineer Tim Peterson Project Analyst Compliance Inspector Mark Madonna, PE Survey Technician Brett Hadley, PE, QSD/P Senior Civil Engineer Clayton Bradshaw, PE, PLS Director of Surveying Daniel Herrera Survey Technician Jamie Platz, PE Senior Civil Engineer JB Barrera Assistant Resident Engineer Julie Rae Wilson Controller Erik Rutherford, PE Senior Mechanical Engineer Suzanne Baird, PLA, ASLA Landscape Architect Wen Bin Sullivan, PE Civil Engineer Alvaro Escobedo Associate Engineer Lonnie Richardson Senior Project Analyst Jorge Avila Assistant Resident Engineer Bryce Dilger, PLS Senior Land Surveyor II Marcus Jackson Senior Program Manager Lee Faraca, PE Civil Engineer Marco Castaneda, PLS Professional Land Surveyor George Marchenko, PLS Senior Land Surveyor Gabriela Mendoza Accountant Conner Kelly, PE Associate Engineer Zach Markow, PE Civil Engineer Jenni Metzger Project Analyst Alexandra Cass Associate Engineer Skye Thomas, PLS Senior Land Surveyor Jessica Escobar, PLA Landscape Architect Brandon Puccini Associate Engineer Bill Lindahl, PE Senior Mechanical Engineer Jenna Mitchell Human Resources Manager Jamie Rogers Marketing Coordinator Greg Hulburd, PE, QSD/P Director of Water Resources Zachary Caipang, PE Associate Engineer Ethan Pence, PE Civil Engineer Want to make our communities better? Join Our Team More Of Our Projects