Senior Mechanical Engineer (Defence)

Come and grow with us.

Our global portfolio of work comprises the design of iconic and award-winning buildings and landscapes. From strategic planning through to project realisation, the connections we make among people and place provide sustainable outcomes for our clients and the communities we serve. We place a premium on investing in digital capabilities and innovations which bring a unique consistency and efficiency to our scalable work. Together with our clients, we are working to evolve and elevate the built environment across sectors including social infrastructure, transit, technology and logistics, and commercial and corporate real estate, while focusing on solutions that promote long term health and wellbeing for all.

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.

Our Building Engineering team are looking for a Senior level Mechanical Engineer to join their national team. This will be a technically focused role, where you will be working on large, multi-disciplinary projects. 

Whilst our preference is for the role to be based in Adelaide, this role can also be based in Sydney, Brisbane or Melbourne. 

How you’ll make a difference:

• Leverage your mechanical design expertise to deliver innovative, sustainable, and cost-effective outcomes across diverse sectors, primarily focusing on defence projects. Ensure projects meet client expectations and industry standards. 

• Take ownership of mechanical design packages for major building projects, ensuring technical excellence in HVAC and building services systems while collaborating closely with multidisciplinary teams to integrate various engineering disciplines and achieve cohesive project outcomes.

• Provide guidance and mentorship to graduate and junior engineers, fostering their technical growth and encouraging a culture of continuous improvement within the team, while sharing best practices and insights from your own experience in the field.

• Proactively identify opportunities for improvement in design processes and methodologies, prepare detailed technical design documentation under senior guidance, and incorporate sustainable mechanical design initiatives to enhance project efficiency and environmental impact.

• Collaborate with internal teams and clients to deliver coordinated solutions that address complex engineering challenges, maintain strong working relationships, and contribute to repeat business through exceptional project delivery and client satisfaction.

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.

• BEng in Mechanical Engineering with knowledge or exposure to Camel or IES software (not essential but advantageous). Relevant registration (RPEQ, RPEV) and working towards CPEng
• Experience working for a Building Services Consultancy or have demonstrable design experience working as a Mechanical Engineer for a Contractor or State Government.
• Demonstrated experience and understanding of standards, requirements and legislation related to building services design in Queensland
• Prior experience or understanding of Revit, not essential but advantageous.
• Outstanding written and verbal communication skills. 
• Previous Defence experience is strongly preferred, with nuclear industry experience highly regarded.

Please note, due to the nature of the projects Australian Citizenship is required, with previous or current defence clearance highly regarded. 

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         
• 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.

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/.

About AECOM

AECOM is the world’s trusted infrastructure consulting firm, delivering professional services throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. On projects spanning transportation, buildings, water, new energy and the environment, our public- and private-sector clients trust us to solve their most complex challenges. Our teams are driven by a common purpose to deliver a better world through our unrivaled technical and digital expertise, a culture of equity, diversity and inclusion, and a commitment to environmental, social and governance priorities. AECOM is a Fortune 500 firm and its Professional Services business had revenue of $16.1 billion in fiscal year 2025. See how we are delivering sustainable legacies for generations to come at aecom.com and @AECOM.

Freedom to Grow in a World of Opportunity 

You will have the flexibility you need to do your best work with hybrid work options. Whether you’re working from an AECOM office, remote location or at a client site, you will be working in a dynamic environment where your integrity, entrepreneurial spirit and pioneering mindset are championed.

You will help us foster a culture of equity, diversity and inclusion – a safe and respectful workplace, where we invite everyone to bring their whole selves to work using their unique talents, backgrounds and expertise to create transformational outcomes for our clients.

AECOM provides a wide array of compensation and benefits programs to meet the diverse needs of our employees and their families. We also provide a robust global well-being program. We’re the world’s trusted global infrastructure firm, and we’re in this together – your growth and success are ours too.

Join us, and you’ll get all the benefits of being a part of a global, publicly traded firm – access to industry-leading technology and thinking and transformational work with big impact and work flexibility. As an Equal Opportunity Employer, we believe in each person’s potential, and we’ll help you reach yours.