Office and Operations Assistant SIS Technologies Pty Ltd (SIStec) is seeking an experienced Office and Operations Assistant to support our day-to-day business operations on a part-time basis. The position will initially be three days per week, with the possibility of a fourth day depending on business requirements.

Working hours
are generally 8am to 4pm, with some flexibility by agreement. Additional hours or days may be available from time to time to provide leave or staff coverage. This is primarily an on-site role based in Osborne Park. Working closely with the SIStec team, you’ll support customer order processing, purchasing, freight and dispatch, accounts administration and general office operations. The role would suit someone who enjoys a mix of structured office work and practical, hands-on tasks, takes pride in accuracy, and is comfortable managing a diverse workload.

Key responsibilities
Order processing and logistics
• Process customer orders and maintain accurate order records.
• Raise and manage supplier purchase orders, and track orders through to delivery.
• Coordinate incoming and outgoing freight, deliveries and courier bookings.
• Keep customers, suppliers and freight providers updated on order and delivery progress.
• Assist with packing and dispatching customer orders, including operating a walkie stacker for pallet loads when required.
• Assist with customer enquiries, order updates and related administration. Accounts and purchasing support
• Enter supplier invoices and receipt completed purchase orders.




• Maintain accurate accounts payable records and reconcile supplier statements.
• Prepare and process supplier payments through company internet banking in line with approval procedures.
• Prepare and issue customer invoices, maintain accounts receivable records, allocate payments and assist with account reconciliations.
• Monitor outstanding invoices and follow up overdue accounts.
• Maintain supplier and customer details and financial documentation.
• Liaise with the external bookkeeper and respond to accounts-related queries.
• Assist with bank and credit card reconciliations, month-end reporting and the provision of records to the bookkeeper or accountant.
• Track purchase orders, project costs and relevant cost codes. Office, compliance and safety administration
• Maintain organised electronic and physical filing systems.
• Provide administrative support to management and other team members.
• Assist SIStec management with maintaining WHS records.
• Maintain registers of insurance certificates and other compliance documents.
• Keep insurance and compliance documentation up to date in client portal systems.




• Handle sensitive financial and company information confidentially. Workforce and travel administration
• Maintain employee, leave and training records.
• Support timesheet and payroll administration as required.
• Assist with coordinating staff travel, accommodation and site access, including supporting the Mining Service Technician with site trips and onboarding. Key selection criteria
• Previous experience in administration and accounts support, including accounts payable, accounts receivable or bookkeeping, is required.
• Experience operating a walkie stacker is essential.
• Experience with Xero and HubSpot is desirable.
• Strong Microsoft Office skills, particularly Excel and Outlook.
• High level of accuracy and attention to detail.
• Ability to manage confidential financial and business information.
• Strong organisational and time-management skills.
• Excellent written and verbal communication skills.
• Ability to work independently and contribute effectively within a team.
• Experience in the mining or industrial sector would be an advantage. About SIStec SIS Technologies Pty Ltd (SIStec) is an established supplier of process control instrumentation and technical services to the Australian mining and industrial sectors. The business has been operating since 1985 and is based in Osborne Park, Perth. Additional information
• Immediate start available.
• Applicants must be Australian citizens or permanent residents

📌 Office and Operations Assistant (Perth)
🏢 SIS Technologies (SIStec)
📍 Perth