Whitney Duffy  PE, PTOE, LEED AP

Whitney Duffy serves as the Office Manager for Clark Nexsen’s Vienna, Virginia office and leads the Infrastructure Practice Area. With over 20 years of multidisciplinary experience, she specializes in planning, designing, and delivering infrastructure projects that foster strong, connected communities. Whitney oversees the firm’s Transportation Engineering, Civil Engineering, Water Resources, and Landscape Architecture practices, managing the delivery of complex public and private sector projects, including roadway design, site development, utilities, stormwater management, and active transportation. With a solid technical foundation in transportation and traffic engineering, her expertise includes traffic signal design, traffic analysis and modeling, traffic impact studies, roundabout design, cost estimating, and preparing technical specifications. She is a licensed Professional Engineer and certified Professional Traffic Operations Engineer (PTOE), an active member of the National Society of Professional Engineers (NSPE), and a former Treasurer on the Board of the Virginia Section of Institute of Transportation Engineers (VASITE).

Related: 5 Questions with an Expert: Whitney Duffy on Transportation Design