• AECOM
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Principal Mechanical Engineer - Water Infrastructure

  • Pin (2)420 George Street, Sydney
  • Group (22) Engineering , Engineering Mechanical , Natural Resources - Water , Wastewater Treatment , Water Treatment

Posted : 7/10/25
Applications Close :6/11/25

“Having worked over 20 years, in both consultancies and council, my experience working at AECOM has been refreshing and motivating” – Dominique Keirens, Technical Director – Water Gold Coast, QLD

Come grow with us.

Balancing the world’s need for safe, reliable water with protecting this critical natural resource for the future requires a deep understanding of interconnected systems.

We work with clients across the entire project life cycle — from initial planning studies through final construction and operations and maintenance services — on both traditional and alternative project-delivery options (design-build, public-private partnerships and financing).

With a robust design and construction division, AECOM offers a unique perspective on designing projects that are fully constructible.

Everyone belongs at AECOM

We’re committed to diversity, equity, inclusion, and belonging - because great ideas come from diverse perspectives. AECOM is proud to be a Fortune 500 Most Admired Company, a WGEA Employer of Choice for Gender Equality, #Work180 Equitable Workplace Awards 2025 Winner and an AWEI Bronze Tier LGBTQ+ Inclusive Employer.

Job Description

Due to significant contract awards within our Water business, we are expanding our Water Infrastructure Team in the Sydney.

By joining our team, you’ll be immersed in a strong, long-term pipeline of work, handling complex, large-scale and iconic projects across Australia & New Zealand.

How you’ll make a difference

  • As an experienced engineer, you will play a key role delivering mechanical designs as part of our integrated water infrastructure team across Australia and New Zealand.

  • You will provide mechanical engineering design, advice, review and approval whilst maintaining the high standards of delivery excellence established by the team.

  • Work on a diverse range of major national and international water infrastructure projects, including water and wastewater treatment plants, desalination, major pump station and pipelines, dams and headworks, and support our delivery of water, transport, power and urban development projects.

  • Mentor and develop emerging engineers to shape our future professionals.

The qualities that help you thrive

The following qualifications and experience are highly desired, but if you don’t tick all the boxes you could still be a perfect fit for this role. Please apply, all applications will be considered.

  • Bachelor of Mechanical Engineering & CPEng highly regarded.

  • Demonstrated mechanical design experience in water and/or wastewater projects within a dynamic consulting and design environment.

  • Knowledge of applicable design codes, standards and guidelines.

  • Experience delivering multi-disciplinary solutions and leading technical teams (highly regarded).

  • Passion for delivering high quality work, with excellent client and stakeholder engagement skills.

Why you’ll love working with us

  • Flexible work arrangements, including alternative start/finish times, part-time, job-sharing and hybrid work options

  • Purchase up to 6 weeks additional annual leave per year         

  • Volunteer and representation leave

  • Flex public holidays – swap Easter or other holidays for ones that suit you better.

Ready to push the limits of what’s possible?

We welcome applications from individuals of all backgrounds, including those with disabilities, additional health or mental health needs, and/or neurodiverse conditions. If you require any adjustments during the hiring process, please let us know.

Applications are reviewed as they come in, and the role may close earlier than expected, so if this opportunity sounds like you, we encourage you to apply as soon as possible.

Learn more about life at AECOM: LinkedIn, Facebook , Instagram, X, YouTube - explore our AECOM voices, employee stories, latest projects, and much more!

Supporting Documents

Other Water Job Websites

QLD Water
Careers at Council
VIC Water
Water Industry Operators Association

WITH THANKS TO OUR FOUNDING PARTNERS