Tammy Hefner
Tammy Hefner is an Area Manager for Missouri Construction. Tammy brings more than two decades of progressive experience in transportation operations, maintenance management, and construction oversight within a statewide transportation system. She has led multidisciplinary teams across maintenance, traffic, general services, engineering, and IT, while managing district‑wide budgets, resource allocation, and long‑range operational planning. Her […]
Mark Woodward
Mark Woodward is a Senior Project Manager for Texas Transportation. Mark is a Senior Project Manager in the Houston Energy Corridor office, where he applies his urban roadway expertise to support the transportation team, drawing on his extensive familiarity with the City of Houston, Harris County, surrounding municipalities, and local TIRZs/management districts. Mark brings nearly […]
Jon Wiegand
Jon Wiegand is a Senior Project Manager for Transportation and Practice Lead for Traffic Engineering. Jon brings more than 20 years of progressive experience in traffic engineering and transportation planning across the Midwest. As a trusted project manager and technical advisor, he has led a wide range of multimodal corridor, intersection, interchange, and traffic impact […]
Pavani Silaparasetty
Pavani Silaparasetty is a Regional Director for the Florida Water and Wastewater practice. Pavani is an accomplished water infrastructure leader with more than 17 years of experience in planning, permitting, design, project management, and construction management across Virginia, Texas, and Florida. She has led projects involving wastewater treatment and collection systems; water treatment facilities; distribution […]
Steve Zimmerman
Steve Zimmerman is a Senior Ecologist for Illinois Water Resources. Steve has more than 25 years of experience leading over 300 ecological‑related projects, including prairie, wetland, and woodland restoration; stream restoration; and watershed and green infrastructure planning. He has managed and delivered environmental projects for municipal and private clients, overseeing proposals, budgeting, permitting, QA/QC, and […]
Nathan Brandt
Nathan Brandt is a Lead Engineer for the Iowa Water and Wastewater Practice. Nathan has more than 20 years of experience designing and analyzing complex electrical systems across industrial, commercial, civic, and educational sectors. His technical expertise includes building power systems, medium voltage distribution, microgrids, SKM based engineering studies, arc flash analysis, and emergency power […]
Min Zhou
Min Zhou is a Regional Director for the Municipal Services business unit, based in the firm’s Corona Office. With more than 30 years of experience in the transportation industry, Min brings a distinguished record in leadership, business development, and operational management, along with a strong passion for advancing mobility and infrastructure. She has led multidisciplinary […]
Matt Sokolowski
Matt Sokolowski is a Lead Engineer for the Illinois Water and Wastewater Practice. Matt has nearly 15 years of experience delivering a diverse portfolio of water, wastewater, and environmental projects for municipal clients. He has worked on facilities ranging from 5 MGD to more than 300 MGD, contributing to all project phases—from master planning and […]
Eli Sanchez
Eli Sanchez is the Southwest Design Lead for HR Green’s Broadband business unit. Eli is the Southwest Design Lead for the Texas Broadband design group and manages various broadband projects, including Fiber to the Home/Business (FTTH), Greenfield Deployment, Middle-Mile Network, Right of Way (ROW) and Department of Transportation (DOT) Permitting, Field Data Collection, Pole Attachment […]
Shirjeel Muhammad
Shirjeel Muhammad is a Senior Project Manager for HR Green’s Municipal Services Business Unit. Shirjeel brings more than 26 years of experience in traffic engineering, safety, operations, transportation planning, and project management. With over two decades in supervisory roles across both public and private sectors, his expertise spans traffic impact studies, travel demand modeling, corridor […]