Principal Mechanical Engineer - Building Services

We’re looking for an experienced mechanical engineer who combines strong technical capability with a collaborative, client-focused approach.

Ideally, you’ll have:

10+ years experience within a Building Services consultancy, or significant senior-level design experience in Mechanical Services.

Strong technical design experience across HVAC and mechanical engineering.

Demonstrated experience delivering projects within the defence and/or data-centre sectors.

A strong track record in client management, project delivery and stakeholder engagement.

The ability to manage competing priorities, communicate effectively and deliver against key project deadlines.

A Bachelor’s degree in Mechanical Engineering, Building Services Engineering or a related discipline.

Strong knowledge of Australian building services projects, codes and standards, with the confidence to share your expertise with clients, colleagues and emerging engineers.

We believe great people do their best work when they have the flexibility, support and opportunities to grow.

You’ll have access to:

Flexible working arrangements, including hybrid work, alternative start and finish times and job sharing options.

Up to 6 weeks of additional annual leave each year through our purchased leave program.

Flex public holidays - swap Easter or other public holidays for days that better suit you.

Continuous learning and development, including lunch-and-learns and professional development courses.

Financial assistance for further study, plus 5 days of paid study leave.

Global career opportunities and the chance to work on major projects with talented teams across Australia and around the world.

If you’re an experienced Mechanical Engineer looking for the opportunity to lead, innovate and work on some of Australia’s most complex defence and data-centre projects, we’d love to hear from you.

Apply today and join a team where your expertise can make a real difference.

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/.

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.

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.