Principal Mechanical Engineer (Building Services)

AECOM Corporation; Sydney; Hybrid; AUD 150,000 - 190,000; Full time

Benefits offered by this job

Flexible work options

Extra annual leave (up to 6 weeks)

Flexible holidays

Learning and development opportunities

Global career opportunities

Job summary

AECOM is seeking an experienced Principal Mechanical Engineer to lead the Building Services team in Sydney. The role focuses on delivering complex, multidisciplinary projects across NSW/ACT, mentoring engineers, and growing client relationships within a global infrastructure consultancy.

You will guide design across health, defence, transport, and commercial sectors, ensuring technical excellence, coordination with other disciplines, and robust project delivery while embracing hybrid work

Qualifications

• Ideally, 10+ years’ experience in building services consultancy or contracting design with a strong mechanical engineering background.
• Chartered status (CPEng) essential, other registrations highly regarded.

Responsibilities

• Lead the delivery of complex, multi-disciplinary projects across health, defence, transport, commercial, aviation, data-centre and other major building sectors in NSW/ACT.
• Oversee mechanical and multi-discipline building services design and end-to-end project delivery, coordinating with electrical, fire protection and hydraulics.
• Build and maintain strong client relationships to support business development and secure a robust pipeline of future work.
• Collaborate with multi-disciplinary teams, applying deep technical expertise to drive quality outcomes and ensure best-practice documentation.
• Provide coaching and mentoring to junior engineers to support technical development and high-quality design output.

Skills

Building services

Mechanical engineering

Leadership

Project delivery

Job description

Principal Mechanical Engineer (Building Services)

• Full-time
• Business Group: DCS
• Legal Entity: AECOM Australia Pty Ltd
• Business Line: B&P - Buildings & Places
• Work Location Model: Hybrid
• Operating Group: International
• Primary Location: AU - Sydney, NSW

Work with Us. Change the World.

At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world.

We're one global team driven by our common purpose to deliver a better world. Join us.

Due to continued growth, we are looking for an experienced Principal Mechanical Engineer to help lead and grow the Building Services team in Sydney.

This role presents a unique opportunity to join our national Building Engineering team, delivering iconic projects across ANZ and across a variety of market sectors, while still having a focus on growing and developing the local team in Sydney.

How you'll make a difference:

• Lead the delivery of complex, multi-disciplinary projects across sectors such as health, defence, transport, commercial, aviation, data-centre or other major building sectors around NSW/ACT.
• Lead mechanical and multidiscipline building services design and end-to-end project delivery, including oversight of technical quality, coordination and design management across other disciplines such as electrical, fire protection and hydraulics.
• Actively build and maintain strong client relationships to support business development and further secure a robust pipeline of future work.
• Collaborate effectively within multi-disciplinary engineering teams, applying deep technical expertise to drive quality outcomes through rigorous review of design calculations, specifications, models and drawings, ensuring best-practice documentation and coordinated project outputs.
• Providecoaching and mentoring to junior and intermediate engineers, contributing to their technical development and supporting high-quality design documentation and project delivery.

The qualities that help you thrive:

• Ideally, 10+ years’ experience in building services consultancy or contracting design with a strong mechanical engineering background. Furthermore, Chartered status (CPEng) essential, other registrations highly regarded
• Demonstrated experience intechnical design and multi-disciplinary project delivery
• Deep knowledge of building services systems, standards and best-practice design, with the ability to guide clients, mentor junior engineers and provide technical direction across complex project environments.
• Proven ability to manage multiple concurrent projects, lead multidiscipline bids for building engineering projects, and collaborate effectively with senior leaders to support business development and operational performance.
• Proven track record of enhancing long-term client relationships and working across key sectors such as data centres, commercial, aviation, defence or broader building markets.
• Strong communicator and leader with a passion for growing teams, coaching emerging engineers and driving quality, innovation and continuous improvement within the building services team.

Why you'll love working with us:

• Be part of a nationally recognised, global engineering business
• Work on high-profile, technically challenging projects across key sectors across ANZ
• Join a collaborative culture and work with teams across ANZ
• 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.

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 landson which we, our clients and our communities live and workaround 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.