Koellner Steel Pty Ltd - Northern Rivers, NSW

Position: Office Manager - Accounts, Administration & Operations

Industry: Structural Steel Fabrication & Construction

Employment Type: Full time - 38Hours a week

Location: Northern Rivers, NSW

About the Role

Koellner Steel is seeking a highly experienced, organised and proactive Office Manager to oversee the daily administration, accounts and operations of our busy structural steel fabrication business.

The successful applicant will be confident working independently, managing multiple responsibilities and communicating with staff, suppliers, contractors and commercial construction clients.

Key Responsibilities

Accounts & Payroll

- Manage accounts payable and receivable, invoicing and supplier payments.
- Complete daily bank reconciliations and monitor cash flow.
- Process weekly payroll, timesheets, superannuation and employee entitlements.
- Track project costs, progress claims, retentions and outstanding payments.
- Assist with BAS, GST and financial reporting.

Contracts & Project Administration

- Coordinate construction contracts, subcontractor agreements and project documentation.
- Manage ITPs, SWMS, quality assurance and compliance records.
- Track contract variations, progress claims and project deadlines.
- Assist with tender submissions and client prequalification requirements.
- Maintain accurate project records and document control.

Purchasing & Supplier Management

- Coordinate purchasing, purchase orders and supplier accounts.
- Liaise with suppliers, subcontractors and transport providers.
- Manage material orders, deliveries and purchasing records.
- Monitor supplier pricing and project-related expenses.





Compliance & Company Operations

- Manage company insurances, including workers compensation through icare.
- Coordinate vehicle registrations, insurance, servicing and maintenance.
- Maintain employee licences, training records and plant compliance registers.
- Oversee general office administration and daily operations.

Customer Service & Communication

- Manage customer enquiries, sales administration and quotation follow-ups.
- Communicate with builders, clients, suppliers and contractors.
- Coordinate information between management, workshop staff and site teams.
- Maintain professional relationships with commercial construction clients.

Skills & Experience

Essential:

- Extensive experience with Xero, including payroll, accounts and financial reporting.
- Strong Microsoft Office skills, particularly Excel, Word and Outlook.
- Proven experience in office management, accounts or senior administration.
- Excellent organisational, communication and time-management skills.
- Ability to work independently, prioritise tasks and take ownership of responsibilities.
- Strong attention to detail and financial accuracy.

Highly Regarded:

- Previous experience in structural steel, construction, engineering or manufacturing.
- Knowledge of construction contracts, progress claims and project administration.
- Experience with SWMS, ITPs, Procore or similar construction management systems.
- Understanding of job costing, purchasing and subcontractor coordination.

About You

We are looking for a reliable, motivated and experienced individual who can take ownership of the office, maintain efficient systems and support the ongoing growth of Koellner Steel.

📌 Senior Administrator (Ballina)
🏢 Koellner Steel
📍 Ballina