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.

Join our team at AECOM as a Water/Wastewater Engineering Manager! We are currently seeking a skilled and experienced engineer who is passionate about detailed design and project management. Based in our Orange, California office, this full-time position offers a fantastic opportunity for professional growth and development.

As the Water/Wastewater Engineering Manager, you will have the chance to expand your expertise and take on greater responsibilities within our well-established design team. We are looking for someone with a proven track record in design, team management, proposal writing, business development, and client liaison. Your enthusiasm and experience will be instrumental in enhancing and growing our design team.

At AECOM, we value innovation, collaboration, and a commitment to excellence. This unique role blends project execution with team management functions and is ideal for individuals seeking increased responsibilities in their career. You will have the opportunity to shape projects from start to finish while also leading and mentoring a talented team of professionals.

The responsibilities of this position include, but are not limited to:

• Supervise mid to junior level engineers on multi-disciplinary projects
• Responsible for the coordination and completion of projects on time within budget and within scope.
• Lead technical design staff for projects including:
• Water conveyance/pipelines,
• Potable water treatment,
• Wastewater treatment,
• Water storage (steel/concrete tanks, dams)
• Civil site improvements (drainage, grading),
• Pumping stations (potable water, wastewater, stormwater), and
• Conceptual studies
• Client liaison and relationship management
• Prepare documentation related to current or prospective projects, including correspondence, reports, proposals, and technical specifications
• Communicate and work with other project team members in Orange, Los Angeles, and other regional offices to provide quality service to clients on projects of varying scope and complexity
• Liaise with and assist other departments and offices in the provision of design services to other clients, as applicable
• Participates in interdisciplinary review of project deliverables
• Performs quality control review of design calculations or drawings

Minimum Requirements:

• BA/BS + 8 years of relevant experience or demonstrated equivalency of experience and/or education

Preferred Qualifications :

• Bachelor's degree in Civil, Environmental, or Mechanical Engineering, or other related engineering disciplines
• Substantial experience in detailed design with 8+years of engineering design and project management in a consulting engineering environment delivering water/wastewater projects
• P.E. License 
• Substantial experience in detailed design with 10+ years of engineering design and project management in a consulting engineering environment delivering water and wastewater infrastructure projects
• Master’s Degree in Civil/Environmental/Mechanical Engineering 
• Professional Engineering License in California
• Experience in Municipal Infrastructure design (water mains, sewers, etc.) is an asset
• Familiarity with AutoCAD
• Familiarity with software for modeling water transmission/distribution systems
• Experience with open channel and closed pipe hydraulic calculations, modelling and design
• Experience with coaching and guiding less experienced engineers in delivery of design assignments
• Excellent verbal and written communication skills
• Ability to work independently as well as team building, strong interpersonal, problem-solving and analytical skills
• Proven ability to write winning proposals and obtain new work

• Occasional site travel as needed.
• All your information will be kept confidential according to EEO guidelines.

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.