Executive Assistant - Building & Construction

• Adelaide, SA, Australia

• Full time

McMahon Services is one of Australia's largest privately owned construction, industrial and environmental services organisations, employing more than 1,300 people across Australia.

Our reputation has been built on delivering quality projects, strong client relationships and creating opportunities for our people. We pride ourselves on fostering a supportive and collaborative culture where people are encouraged to learn, grow and build long-term careers.

About the Role

We're looking for an organised, proactive and motivated Executive Assistant to support our Executive General Manager – Building & Construction. The Building & Construction team has 230 staff, operates from 5 offices and the group turns over approximately $160m pa.

This is a varied role where you'll be the trusted support to the Executive General Manager while also assisting the wider Building & Construction team with administration when needed. You'll be involved in everything from diary management and coordinating meetings through to supporting recruitment, onboarding and leadership reporting.

Whether you're already working as an Executive Assistant or you're an experienced Administrator looking to take the next step, we'll provide the mentoring and support to help you succeed.

As this role supports projects within the Defence sector, applicants must be Australian Citizens and be eligible to obtain and maintain a Defence Security Clearance

What You'll Do

• Support the Executive General Manager in achieving goals.
• Manage calendars, meetings, and travel arrangements.
• Prepare meeting agendas, minutes and action items.
• Coordinate reports, presentations and business documentation to support the senior leadership team.
• Assist with leadership meetings and end-of-month reporting.
• Process purchase orders, invoices and expense claims for Executive requirements.
• Support recruitment, onboarding and general people administration.
• Organise team events, workshops and conferences.
• Maintain records, registers and administrative systems.
• Identify opportunities to improve processes and administrative efficiency.

What You'll Bring

• Previous experience as an Executive Assistant or within an administration role (2–3+ years).
• Australian Citizenship with the ability to obtain and maintain a Defence Security Clearance.
• Excellent organisational and time management skills.
• Strong attention to detail and the ability to manage competing priorities.
• A proactive approach and willingness to support wherever required.
• Excellent communication skills and confidence working with stakeholders at all levels.
• Strong Microsoft Office skills.
• A professional and confidential approach to your work.

What Will Set You Apart

• Experience supporting senior leaders or executives.
• A positive, approachable and team-focused attitude.
• The ability to work independently while managing multiple priorities.
• Strong organisational skills and a continuous improvement mindset.
• A genuine desire to build a long-term career.

Why Join McMahon Services?

• Genuine career development opportunities with room to grow.
• Mentoring and support to help you build your Executive Assistant career.
• A collaborative and supportive team environment.
• A diverse role where no two days are the same.
• Access to the MAC Learning Academy, employee benefits and wellbeing initiatives.
• Join one of Australia's leading privately owned construction companies.

Ready to Take the Next Step?

If you're looking for more than just your next job and want to build a long-term career with a business that invests in its people, we'd love to hear from you.

Apply today and join McMahon Services.

No recruitment agencies please.

At McMahon Services, we embrace diversity and inclusion as fundamental values. We believe that a diverse workforce fosters innovation, creativity and a deeper understanding of the communities we serve. We are committed to creating an inclusive environment where all employees feel valued, respected and empowered to contribute their unique perspectives and talents. We encourage applications from people of all backgrounds, identities and experiences.