Senior Traffic Engineer

At HDR, our employee-owners are fully engaged in creating a welcoming environment where each of us is valued and respected, a place where everyone is empowered to bring their authentic selves and novel ideas to work every day. As we foster a culture of inclusion throughout our company and within our communities, we constantly ask ourselves: What is our impact on the world? Watch Our Story: ' ' Each and every role throughout our organization makes a difference in our ability to change the world for the better. Read further to learn how you could help make great things possible not only in your community, but around the world. We believe transportation is more than movement, it’s the foundation of connected, thriving communities. As part of HDR’s Transportation Business Group, you’ll help shape the systems that move people and goods safely, efficiently, and sustainably. From designing resilient highways and iconic bridges to advancing transit, passenger and freight rail, aviation, federal transportation ports and marine infrastructure, your work will directly support economic vitality, public safety, sustainable and resilient communities and quality of life. We bring together planners, engineers, architects, construction management staff, environmental, strategic communications, economists, management consultants and specialists across disciplines to solve complex mobility challenges with innovation, technical excellence, and a deep understanding of community needs. Whether you're modernizing aging infrastructure or pioneering next-generation transportation solutions, your contributions will help define the future of mobility. This isn’t just a job, it’s a chance to lead progress, drive meaningful impact, and leave a legacy of smarter, more connected transportation networks. We are all employee-owners at HDR, which is the foundation of our collaborative culture that connects employees around the world. HDR is looking for a Senior Traffic Engineer to join our South Carolina Area Transportation Business Group in Charleston, SC. In this role, we'll count on you to: Lead a team of engineers and EITs to deliver a variety of traffic-related projects, including capacity analysis reports, traffic forecasting, simulation modeling, roadway design support, signal design transit design support, and more. Work as a Task Lead under the direction of a Project Engineer / Manager or serve as a Project Manager as needed. Conduct operational traffic analysis using a variety of modeling tools, ranging from highway capacity software to complex micro simulation models; analyze everything from isolated intersections and roundabouts to urban arterials and freeway segments. Participate in traffic signal design and traffic signal timing projects; including but not limited to, drafting signal plans, conducting field visits, preparing signal timing calculations, developing quantity takeoffs and preparing cost estimates. Provide technical support to junior staff. Take a proactive approach to learning, developing your skillset, and understanding the industry. Perform other duties as needed. Preferred Qualifications Master's degree in Civil Engineering is preferred Supplemental licensure, such as PTOE and/or RSP are preferred Computer skills using Microsoft Office, Synchro/Sim Traffic, HCS, Vissim/Visum, ArcGIS, TransModeler, AutoCAD and MicroStation Local candidates are preferred Required Qualifications A minimum of 10 years' experience in ITS and traffic engineering for urban and rural highways, major and minor interchanges and intersections Requires professional engineering license recognized by the licensing board for the location of the position offered. Example: Professional Engineer (PE or P.Eng) license. Knowledge of regulations of state and federal transportation agencies Proficiency with Microsoft Office Experience using HCS, CORSIM, Synchro/SIM Traffic and other software packages Strong oral and written communication skills, presentation skills and ability to work in a team environment An attitude and commitment to being an active participant of our employee-owned culture is a must What We Believe HDR is our company. Together, we build on each other's life experiences and perspectives to make great things possible every day. This shapes our collaborative culture, encourages organizational trust and connects us closer to the clients and communities we serve. Our Commitment As employee owners, we all have a role in creating an inclusive environment where each of us is welcomed, valued, respected and empowered to bring our authentic selves to work every day. Our eight Employee Network Groups (Asian Pacific, Black, Hispanic/Latino(a), LGBTQ+, People with Disabilities, Veterans, Women, Young Professionals) help create a sense of belonging and foster a supportive environment where everyone is empowered to engage and contribute. Each group has an executive sponsor and is open to all employees. Primary Location United States-South Carolina-Charleston Industry Highway + Road Schedule Full-time Employee Status Regular BusinessClass : Traffic Engineering Job Posting Oct 13, 2026 At HDR, we are committed to the principles of employment equity. We are an affirmative Action and Equal Opportunity Employe r. We consider all qualified applicants, regardless of criminal histories, arrest and conviction records. Ready to learn more? Let's work together to make great thingspossible. We design solutions to the world's greatest challenges. We'realways looking for great talent to join our global teams. #J-18808-Ljbffr