Mathematical Modeler Jobs in Virginia (NOW HIRING)

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At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world's most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

AECOM is seeking a Travel Demand Modeler to join our Arlington, VA office, supporting a diverse portfolio of transportation planning and modeling projects across the Mid-Atlantic and nationwide.

This role is suited for an early-career professional interested in developing technical expertise in travel demand modeling, data analysis, and modeling-related software tools. You will work within a collaborative team of approximately 10 modelers, supporting senior staff and contributing to model development, analysis, and project delivery.

We are particularly interested in candidates with an interest in dynamic traffic modeling or Activity-Based Modeling (ABM), along with a demonstrated curiosity for coding and software development, including exposure to Python and/or C++.

This is a hybrid work position, with flexibility depending on project needs.

Key Responsibilities

• Support the development, calibration, validation, and application of travel demand models (trip-based and/or activity-based)
• Assist in implementing and maintaining travel demand models and related tools
• Support application of mode choice models and discrete choice frameworks
• Contribute to analyses using dynamic traffic assignment (DTA) and multimodal modeling approaches
• Assist with data preparation, model inputs, and performance evaluation
• Support troubleshooting of model runs and assist in resolving technical issues
• Help ensure quality, consistency, and reproducibility of modeling outputs
• Contribute to integration of modeling tools, scripts, and workflows
• Assist senior staff with technical documentation, reports, and presentations
• Collaborate with interdisciplinary teams of planners, engineers, and analysts

Minimum Requirements

• Bachelor's degree in Engineering, Transportation Planning, Applied Mathematics, Computer Science, or related field
• Basic programming experience in Python, R, C++, or similar languages
• Experience working with Excel and data analysis techniques
• Exposure to GIS platforms (ArcGIS Pro, QGIS)

Preferred Qualifications

• Master's degree in a related field
• Relevant experience, including internships or academic research
• Strong problem-solving, analytical, and communication skills
• Exposure to travel demand modeling tools
• Interest in developing coding and analytical skills
• Academic or project exposure to Activity-Based Models (ABM) and/or Dynamic traffic modeling or network analysis
• Familiarity with or interest in COG/TPB travel demand models (Gen2 or Gen3) or travel modeling applications for MPOs or DOTs
• Learning or using C++ for modeling applications
• Writing efficient, well-structured code
• Exposure to Big data sources (RITIS, StreetLight, Replica, TomTom), visualization tools (Power BI, Tableau) and cloud environments (AWS, Azure)
• Interest in modeling workflows, automation, and emerging tools

• Relocation is not available for this position.
• Sponsorship for US employment authorization is not available now or in the future for this position.

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients' complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle - from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at aecom.com. 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you'll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you've always envisioned. Here, you'll find a welcoming workplace built on respect, collaboration and community-where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.