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