Principal Mechanical Engineer

AECOM · Sydney, NSW, Australia

  • Senior
  • Full-time
  • Posted 2026-09-25
  • Confirmed live on 25 September 2026

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Job description

Job Description
Our Buildings & Places team based in Sydney are looking for a Principal Mechanical Engineer to support the continued growth of the business. This opportunity presents an excellent opportunity to develop your experience in delivering multi-disciplinary projects across the defence and data-centre space.
What will a day in this role look like:

• Utilise your extensive design experience to facilitate high-quality and cost-effective work on a variety of projects varying in size, scope and sector.

• Lead mechanical designs and delivery for our major client projects including participating in the technical review of projects whilst working collaboratively with the broader team.

• Assist in the mentoring and guidance of junior engineers within the local and national team including performing quality control review of design calculations and drawings.

• Work effectively within our multi-disciplinary engineering teams on major projects including contributing to interdisciplinary review of project deliverables.
Please note, due to the nature of the projects Australian Citizenship is required, with previous or current defence clearance highly regarded.

Qualifications
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.
What are we looking for from you?

• 8-10 year's experience working for a Building Services consultancy or have significant design experience working as a Senior Engineer in the Mechanical Services field.

• Proven knowledge and experience working within a technical design-focussed HVAC/Mechanical Engineering role.

• Demonstrable design experience across defence and data-centre projects.

• A track record in client management skills, project delivery and the ability to manage project priorities whilst communicating with internal and external stakeholders on key project deadlines and deliverables.

• Use your Tertiary Education (BEng in Mechanical Engineering or Building Services Engineering) alongside your understanding of Australian Building Services Projects and Standards to impart your technical knowledge to clients, junior engineers and broader teams on a range of major projects across Australia.

Additional Information
Why you’ll love working with us

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

• Purchase up to 6 weeks additional annual leave per year

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

• Continuous learning and growth - lunch and learns, professional development courses, financial study assistance, 5 days paid study leave, global career opportunities
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!
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-reconciliation/.

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-reconciliation/.
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