Sr. Project Manager - Water/Wastewater

• Legal Entity: AECOM Technical Services Inc
• Business Line: Water
• Work Location Model: Hybrid
• Primary Location: US - Orange, CA - 999 Town & Country
• Compensation: USD 117,000 - USD 220,000 - yearly

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 Water is seeking a highly skilled and experienced Sr. Project Manager to support Orange County Sanitation District’s Capital and Small Projects Program through AECOM’s staff augmentation and engineering support contract. This is a hybrid role, with the selected candidate reporting to OC San’s Fountain Valley office 2-3 days per week, with the remaining time worked remotely as appropriate.

The selected candidate will serve in a program-level project management role, supporting the planning, coordination, and delivery of multiple water and wastewater capital and small projects. This position requires a strong background in municipal water/wastewater infrastructure, owner-side project delivery, and the ability to manage multiple projects and stakeholders simultaneously.

The Project Manager will work closely with OC San staff, AECOM technical teams, and external consultants and contractors to ensure projects are delivered on schedule, within budget, and in accordance with OC San standards and objectives. This role may support large, complex capital projects while independently managing one or more moderately complex projects.

Key Responsibilities

Responsibilities include, but are not limited to, the following:

• Support program-level delivery of municipal water and/or wastewater capital and small projects.
• Independently manage one or more moderately complex projects from planning through closeout, including scope, schedule, budget, and risk management
• Coordinate and oversee all phases of assigned projects, ensuring delivery on time, within budget, and within scope
• Provide owner-side project management support, including project controls, scheduling, cost tracking, estimating, procurement coordination, and change management
• Direct and coordinate the efforts of AECOM technical staff, subconsultants, and other support resources
• Interface directly with OC San project managers, engineers, operations staff, and leadership
• Identify, assess, and mitigate project risks; proactively resolve issues to minimize impacts to cost, schedule, and quality
• Review and provide quality control oversight of design calculations, drawings, specifications, and technical documents
• Participate in interdisciplinary reviews of project deliverables
• Prepare project-related documentation, including correspondence, reports, meeting minutes, schedules, and status updates
• Support coordination with contractors during construction, including RFIs, submittals, and issue resolution
• May provide guidance and oversight to mid- and junior-level engineers or project managerssupporting assigned projects
• Collaborate with AECOM regional teams as needed to support OC San program objectives

Qualifications

• Bachelor's degree in civil engineering, or related engineering field and 6 years of experience in water/wastewater engineering and design, including project analysis, feasibility, and budgeting requiredor demonstrated equivalency of experience and or education
• Valid Driver’s License and must be able to pass AECOM’s Motor Vehicle Records review.

Preferred Requirements:

• Master's degree in Civil or Environmental Engineering
• Registration as a Professional Engineer in California, or able to obtain same in six months after hiring
• Strong written and oral communication, quantitative and interpersonal skills
• Strong work ethic and professional demeanor
• Proactive on assignments and demonstrate initiative
• Must work independently with minimal supervision, and complete multiple technical tasks under tight deadlines
• Proficient with CAD and design software (Civil 3D, Bentley Design Suites, Water CAD, Sewer CAD, ARC GIS, etc

Additional Information

• Sponsorship will not be considered for this position
• Relocation will not be considered 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.