Transportation Engineer (Traffic Modeling)

SYSTRA

We are seeking a seasoned Transportation Engineer with extensive macroscopic and microscopic modeling experience to lead traffic and mobility studies across complex urban and corridor environments. You will guide end-to-end modeling workflows, translate technical outputs into actionable recommendations, and support planning, design, and operational decision-making for public and private sector clients.

Missions/Main Duties

• Lead the development, calibration, and validation of multi-scale traffic models, including VISUM for strategic demand and network assignments and VISSIM for detailed operational simulations and microsimulation of corridors, junctions, and transit priority schemes. Establish modeling methodologies, QA/QC protocols, and scenario frameworks aligned with local standards and international best practices.
• Define data requirements and oversee data collection plans (counts, OD matrices, GPS/FCD, AVL/APC, signal timing, travel times). Process and reconcile multi-source datasets, develop base year models, and apply rigorous calibration and validation procedures using KPIs such as GEH, V/C, delay, and travel time reliability.
• Build and assess scenarios covering masterplans, land-use changes, network enhancements, transit priority, ITS strategies, demand management, and construction traffic management. Evaluate performance using LOS, queues, person-throughput, emissions/energy proxies, and reliability metrics; generate clear, decision-ready insights and mitigation strategies.
• Interface with roadway and transit design teams to test geometric alternatives, signal control strategies (fixed-time, actuated, adaptive), bus priority, and multimodal operations. Prepare signal timing plans, coordinate with control center and authority stakeholders, and support temporary traffic management and staging plans.
• Engage with client authorities, developers, and multidisciplinary teams to define objectives, present findings, and secure approvals. Produce high-quality technical reports, executive summaries, and visualizations that convey complex modeling results to both technical and non-technical audiences.
• Apply KSA/GCC authority guidelines and international references (HCM, ITE, MUTCD, PIARC) where applicable. Contribute to internal standards, templates, and knowledge sharing. Mentor junior modelers and engineers, review deliverables, and promote continuous improvement.