Senior Transportation Engineer

Company Description

Work with Us. Change the World.

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.

Job Description

AECOM is seeking a Senior Transportation Highway/Roadway Engineer to lead the planning, design, and delivery of mid‑ to large‑scale roadway and highway improvement projects in our Orange, CA Office. This role requires strong technical expertise, project leadership, and the ability to deliver high‑quality, client‑focused solutions in compliance with Caltrans and local agency standards.

Key Responsibilities

• Serve as Lead Engineer on mid‑ to large‑scale highway and roadway projects.
• Provide technical leadership and subject‑matter expertise throughout project development, from studies through final design.
• Review, approve, and sign engineering work as required.
• Perform quality control and quality assurance reviews of work prepared by others.
• Develop and oversee Caltrans and Greenbook‑compliant design packages, including plans, specifications, and estimates.
• Prepare engineering cost estimates, schedules, and budgets for large projects.
• Present complex technical concepts and design solutions to clients and stakeholders.
• Contribute to the preparation of technical proposals and presentations.
• Mentor and guide staff, promoting technical excellence and professional development.
• Participate in professional organizations and support business development efforts as needed.

Qualifications

Required Qualifications

• Bachelor’s degree in Civil Engineering or a related discipline.
• Minimum of eight (8) years of relevant transportation engineering experience, or an equivalent combination of education and experience.
• U.S. citizenship required

Preferred Qualifications

• Professional Engineer (PE) license; ability to obtain California PE licensure within 12 months if not currently licensed in California.
• Ten (10) or more years of progressively responsible highway and roadway design experience.
• Demonstrated experience delivering Caltrans highway or roadway projects (Southern California experience preferred).
• Proficiency in MicroStation, InRoads, AutoCAD, and Civil 3D, with experience leading design teams using these tools.
• Experience preparing technical specifications using Greenbook and/or Caltrans standards.
• Strong written and verbal communication skills.
• Interest in marketing and business development, including proposal support and client presentations.

Additional Information

• Sponsorship is not available
• THIS POSTING IS FOR A CURRENT VACANCY, AND AECOM INTENDS TO FILL THIS POSITION BY 12/29/2026

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.