Senior Civil Engineer - Water/Wastewater

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.

AECOM's Water business line is seeking a Senior Civil Engineer with strong site civil design expertise to join our Water/Wastewater/Conveyance team in Orange, CA. This is an opportunity to lead multidisciplinary projects that shape critical water infrastructure across the United States—including treatment plants, pump stations, and conveyance systems. The ideal candidate will have demonstrated experience in grading, drainage, and pipeline design and will bring creative solutions and leadership to our growing Southern California water practice.

Key Responsibilities

• Lead and oversee site civil design efforts for water and wastewater infrastructure facilities, including rough and precise grading, drainage, paving, and site utilities.
• Manage and perform pipeline design for water, wastewater, and stormwater conveyance systems (gravity and pressure).
• Coordinate civil site design with architectural, structural, and process engineering teams to ensure constructible, cost-effective, and sustainable solutions.
• Conduct field visits, condition assessments, and constructability reviews to confirm design intent and compliance with client standards and regulatory requirements.
• Prepare and review design plans and specifications for civil site work and pipelines.
• Provide technical guidance, mentoring, and QA/QC support to junior engineers and CAD designers.
• Participate in client meetings and internal coordination with project managers to align design objectives and deliverables.
• Prepare clear, concise technical memoranda, design reports, and design calculations.
• Stay current on industry standards, codes, and innovative technologies in site civil and water infrastructure design.

Minimum Requirements

• Bachelor’s degree in Civil Engineering (or related discipline). and 10 years of progressively responsible civil design experience. or demonstrated equivalency of experience and or education
• California Professional Engineer (PE) license or ability to obtain within 6 months.
• Valid U.S. Driver’s License and ability to pass AECOM’s Motor Vehicle Record review.

Preferred Qualifications

• 15+ years of experience in civil and pipeline design for municipal water and wastewater projects.
• Proven expertise in grading, drainage, and site civil design.
• Demonstrated experience with water, wastewater, and/or stormwater pipeline design, including preparation of construction documents.
• Strong understanding of open-cut and trenchless construction methods (microtunneling, jack-and-bore, HDD).
• Experience preparing Water Quality Management Plans (WQMPs), Storm Water Pollution Prevention Plans (SWPPPs), and post-construction BMP designs.
• Master’s degree in Civil or Environmental Engineering.
• Familiarity with water and sewer rehabilitation techniques.
• Envision SP certification or interest in sustainable infrastructure design.
• Proven leadership in mentoring and developing staff.

• Sponsorship is not available for this position
• Relocation may be available for this position

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 2024. 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.