Company Description

Grow with Us.

At AECOM, we are committed to balancing the world’s need for safe, reliable water while protecting this vital natural resource for future generations. Our approach requires a profound understanding of interconnected systems, and we pride ourselves on working with clients throughout the entire project lifecycle, from initial planning studies to final construction and ongoing operations and maintenance services. We offer both traditional and innovative project delivery options, including design-build, public-private partnerships, and financing.

Why AECOM?

We believe that everyone belongs at AECOM . Our commitment to diversity, equity, inclusion, and belonging ensures that excellent ideas emerge from diverse perspectives. AECOM is honored to be recognised as a Fortune 500 Most Admired Company, a WGEA Employer of Choice for Gender Equality, and a recipient of the #Work180 Equitable Workplace Awards 2025, along with being an AWEI Bronze Tier LGBTQ+ Inclusive Employer.

Job Description

About the Role

Due to significant contract awards within our ANZ Water business, we are expanding our Water Infrastructure Team in Melbourne, VIC. Our Water Infrastructure group provides essential services to a diverse range of clients, focusing on water and wastewater treatment, dams, asset management, major conveyance, industrial, civil infrastructure, mining, and defense sectors. We are dedicated to supporting sustainable outcomes for our clients and the communities they serve.

We are seeking a passionate Principal Mechanical Engineer to join our team. In this role,



you will benefit from mentoring and guidance from industry‑leading experts and have the opportunity to collaborate with colleagues across interstate and international offices.

How You’ll Make a Difference

- Prepare feasibility studies, outline designs, detailed designs, and construction support.
- Produce plant layouts, design drawings, and mechanical plant selections, including specifications, WIMES Data Sheets, valve schedules, equipment schedules, lifting strategies, hydraulic headloss calculations, and P&IDs; for water projects.
- Collaborate with our water and other discipline teams, including civil, electrical, process, and mechanical engineers nationwide.
- Conduct site visits to perform surveys and liaise with clients, contractors, and suppliers.
- Participate in and contribute to design review meetings such as HAZOPs, HAZIDs, ALMs, and SWIFTS.

Qualifications

While the following qualifications and experience are highly desired, we encourage you to apply even if you don’t meet every requirement. All applications will be considered

- A degree (or equivalent) in Mechanical Engineering.
- Progress toward Chartered status with a relevant institution (e.g., IMechE or Engineers Australia).
- Proven ability to deliver engineering designs, reports, drawings, technical specifications, and calculations with confidence and precision.
- Hands‑on experience delivering innovative solutions for water and wastewater engineering projects.




- Proficiency in hydraulic modelling and related software (mechanical or civil), including network hydraulic grid modelling, adding new connections, assessing overall grid performance, and transient/surge modelling.

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 of additional annual leave per year.
- Volunteer and representation leave.
- Flex public holidays—swap Easter or other holidays for those 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.

#WORK180

Additional Information

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.

AECOM acknowledges the Traditional Owners and Custodians of the lands on which we, our clients and our communities live and work around Australia. We pay our respects to their cultures and to their Elders — past, present, and emerging. We are committed to connecting to Country in our work through meaningful engagement with First Nations peoples and businesses. Find out more about our Australian Reconciliation Action Plan here: https://aecom.com/au/our-vision-for-reconciliatio

📌 Principal Mechanical Engineering (Melbourne)
🏢 Aecom
📍 Melbourne