About the Role:
Looking for more than just a job? Join a business where you're valued, supported, and part of something growing with purpose.
At Mossop Construction + Interiors, we have a strong and consistent pipeline of work across South Australia, including our Mt Gambier division. As we continue to grow, we're seeking a proactive Office Administrator to become the backbone of our regional operations.
Based in Mt Gambier and reporting to the Regional Manager, you'll provide key administrative and operational support, working closely with leadership, project teams, HR, and finance.
This is a fast‐paced, varied role for someone who thrives on organisation, enjoys being the go‐to person, and wants long‐term stability with a respected construction business.
Duties include:
* Providing administrative support to the Regional Manager and wider team.
* Managing calendars, meetings, travel bookings, and office coordination.
* Preparing reports, presentations, correspondence, and documentation.
* Coordinating meetings, taking minutes, and maintaining action registers.
* Supporting HR administration, onboarding, and uniform coordination.
* Handling client and stakeholder communications professionally.
* Managing office supplies, subscriptions, and general operations.
* Assisting with project administration including:
* Progress claims and subcontractor processing.
* Variations, payment schedules, and reporting.
* Extension of Time (EOT) documentation support.
* Supporting project close‐out activities and maintenance coordination.
* Maintaining accurate filing systems and document control.
* Assisting with financial administration including purchase orders and reconciliations.
About You:
You're a highly organised professional who enjoys variety and takes ownership of your work. You're confident dealing with people at all levels and understand the importance of discretion and professionalism.
You bring:
* 3–5 years' experience in office administration or executive support.
* Strong organisational and time management skills.
* Ability to juggle multiple priorities in a deadline‐driven environment.
* High attention to detail and accuracy.
* Excellent communication and stakeholder management skills.
* Intermediate to advanced Microsoft Office skills.
* Experience in construction, property, or a similar industry (highly regarded).
Role Requirements:
* National Police Clearance (or be willing to obtain)
* First Aid Certification (desirable)
* Working with Children (or be willing to obtain)
* Current driver's licence and access to a reliable vehicle
* Satisfactorily pass a pre‐employment medical, including drug and alcohol test
Our Values, Culture and Benefits:
Mossop is a people business. Being part of the team means you'll be in a culture that promotes creativity and innovation, is open to feedback, rewards impact and ensures everyone is heard, whilst providing opportunity to work on an exciting, diverse range of projects.
Importantly you'll receive the following:
* Two additional days of leave each year to rest and recharge
* Access to novated car leasing
* Loyalty leave once you hit three years of tenure, to say thank you!
* Access to flexible working arrangements and our Employee Assistance Program (EAP)
* Annual flu vaccination and skin check
* Casual clothes Friday (Head Office only)
* Professional development and training
* Regular social events to promote a positive team culture and recognise employee milestones
* Competitive remuneration to align with skills and experience, and a staff referral bonus
Equal Employment Opportunity Statement:
Mossop Construction + Interiors is committed to providing an inclusive and equal employment opportunities work environment and invites applications from all nationalities, genders, and cultural backgrounds, including Aboriginal and/or Torres Strait Islanders.
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