Senior Roadway Drainage Engineer (Hydrology & Hydraulics)

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The AECOM Water Business Line is seeking a Senior Roadway Drainage Engineer (Hydrology & Hydraulics) to join the Phoenix, AZ office. This role focuses on roadway and highway drainage design, hydrologic and hydraulic modeling for transportation corridors, and development of storm drain, culvert, and cross-drainage systems in support of municipal and DOT infrastructure projects.

Lead hydrologic and hydraulic analysis and design for roadway drainage systems, including storm drain networks, culverts, inlets, gutter flow, spread analysis, and hydraulic grade line (HGL) evaluations along transportation corridors

This role leads the delivery of mid- to large-scale infrastructure projects while providing a clear path into a technical lead role with PM responsibilities and growth within AECOM’s growing water resources practice. The successful candidate will provide technical leadership, mentor junior staff, support client relationships, and contribute to business development within a collaborative, multi-disciplinary team environment. 

Job Description

• Serve as lead engineer or discipline lead for mid- to large-scale water resources and stormwater infrastructure projects
• Direct preparation and delivery of construction packages, including design drawings, specifications, cost estimates, alternatives analyses, technical memoranda, and design reports
• Plan, schedule, and coordinate detailed phases of engineering projects with a focus on stormwater management systems
• Perform and oversee hydrologic and hydraulic analyses specifically for roadway and highway drainage, including culvert sizing, storm drain system design, cross-drainage structures, and floodplain impacts at roadway crossings.
• Lead conceptual and final design of roadway drainage infrastructure including culverts, storm drain systems, detention facilities, channels, and erosion control measures integrated with roadway profiles and grading plans.
• Prepare roadway drainage plans, profiles, and details in coordination with roadway design teams using Civil 3D, ensuring compliance with DOT, county, and municipal drainage criteria.
• Ensure designs incorporate erosion control measures, geosynthetics, and surface and subsurface drainage systems
• Provide technical oversight, independent reviews, and approval of engineering analyses and design deliverables
• Manage and coordinate multi-disciplinary project teams, including subcontractors, typically consisting of five or more team members
• Mentor and provide technical direction to junior engineers and designers
• Support client coordination, present design solutions, and contribute to development of project proposals and business growth initiatives

Minimum Requirements

• Bachelor’s degree in Civil Engineering or related discipline with 8 years of relevant professional experience
• Professional Engineer (P.E.) license in Arizona or ability to obtain within six (6) months of hire

Preferred Qualifications

• Master’s in Civil Engineering or related field of study
• Experience with DOT or municipal roadway drainage standards (e.g., ADOT,, county public works) including inlet spacing, gutter flow, spread calculations, and storm drain hydraulic design.
• Bachelor’s degree in Civil Engineering or related discipline with 10 years of relevant professional experience
• Demonstrated expertise in stormwater evaluation and design, including 1D/2D hydrologic and hydraulic modeling
• Proficiency with industry-standard modeling software (e.g., Open Roads Design (ORD) HEC-RAS, HEC-HMS, SRH-2D)
• Experience leading design tasks on complex water resources or design-build projects
• Strong understanding of stormwater permitting, floodplain management, and regulatory coordination
• Experience developing grading, drainage, and roadway plans in coordination with CAD designers (AutoCAD Civil 3D preferred)
• Proven ability to manage scope, budget, and schedule for complex engineering tasks
• Experience preparing technical reports, calculation packages, and construction documentation
•  Demonstrated technical review and quality control oversight experience
• Strong analytical skills with sound application of civil engineering design principles
• Effective communicator with the ability to lead teams and collaborate with other team members

• Sponsorship is not available for this role
• No relocation is available for this role.

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.