Sumo Energy is an Australian-owned energy retailer providing electricity and gas services to residential and small business customers across multiple states.
Sumo has built a strong presence through competitive pricing, simple plans, and a customer-first approach.
Sumo prides itself on delivering "good, honest service"with a strong local focus and commitment to improving the customer experience.
Sumo combines agility with a strong customer focus—offering a unique opportunity to shape finance in a growing, dynamic environment.
The Role
We are seeking a proactive and detail-oriented Finance Officer / Assistant Accountant to support the day-to-day operations of our Finance team.
This broad, hands-on role will be responsible for accounts payable and receivable, vendor management, payment processing, bank and credit card reconciliations, cashflow support, and maintaining accurate financial records.
You will work closely with internal stakeholders, suppliers and external service providers to resolve queries, improve finance processes and support month-end reporting.
This is an excellent opportunity for someone looking to broaden their accounting experience and progress their career in a fast-paced and supportive environment.
Key Responsibilities:
Accounts Payable, Receivable (AP/AR) and Vendor Management
Process and post supplier invoices, ensuring all required management approvals are obtained.
Maintain the Accounts Payable inbox and respond to urgent payment requests and vendor queries.
Create and verify new vendor records, including validating bank details through EFTSure to reduce the risk of fraud.
Liaise with vendors to resolve invoice, account and payment discrepancies.
Prepare electricity wholesale/network counterparties invoicing data and follow up outstanding invoices.
Liaise with the Customer Service team regarding customer chargebacks and refunds, including performing checks to confirm accuracy and approval.




Manage vendor credit applications and follow up payment-related matters.
Prepare concession invoices for government departments, perform sample checks of concession calculations and assist with annual concession audits.
Cashflow and Treasury Support
Maintain and update the daily cashflow statement.
Monitor daily cash receipts/expenses and investigate discrepancies or unusual transactions.
Monitor daily and monthly cash movements to ensure transactions are accurately recorded and sufficient funding is available.
Distribute daily reports, including aged trial balance and cash receipts reports, to relevant stakeholders and business partners.
Prepare and circulate high-level loan facility availability calculations, supported by detailed aged trial balance information, to shareholders and other relevant stakeholders.
Financial Reporting and Reconciliation
Complete bank reconciliations, employee expense claims and credit card reconciliations on a timely basis.
Perform monthly Accounts Payable and Accounts Receivable reconciliations to ensure invoices are accurately recorded and overdue balances are investigated and explained.
Prepare and post journals for commissions, concessions, prepayments, amortisation and other financial adjustments.
Maintain the Fixed Asset Register, including recording asset additions, disposals, transfers and depreciation.
Reconcile the Fixed Asset Register to the general ledger, and ensuring supporting documentation is retained.
Update and maintain gas volume summaries and related supporting reports.




Regulatory Compliance and Audit Support
Provide support for regulatory and financial audits, including Victorian concession audits, annual statutory audits and the BDO semi-annual audit.
Prepare supporting documentation and respond to audit queries as required.
Other Ad-hoc tasks as required
Essential Skills and Experience:
Previous experience in an accounts payable, accounts receivable, finance officer, assistant accountant or similar finance role.
Robust understanding of basic accounting principles, including journals, reconciliations, accruals, prepayments and general ledger coding.
Experience processing supplier invoices, employee expense claims, credit card transactions and payment runs.
Strong Cashflow management skills, including monitoring bank balances, understanding upcoming cash requirements, prioritising payments, and supporting short-term cashflow forecasting.
Ability to prepare and update cashflow schedules, identifying timing differences, flag potential funding gaps early, and communicate cash requirements to management.
Ability to complete bank reconciliations, AP/AR reconciliations and month-end support tasks accurately and on time.
Strong attention to detail, with the ability to identify discrepancies, investigate issues and follow through to resolution.
Good Excel skills, including working with large data sets, formulas, reconciliations and supporting schedules.
Strong organisational skills and the ability to manage deadlines, competing priorities and recurring finance tasks.
Clear communication skills, with the confidence to follow up stakeholders, resolve queries and elevate issues early.
Ability to work independently once trained, while also contributing positively within a small finance team.
A proactive, reliable and process-driven approach, with a willingness to improve processes and maintain accurate records.
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📌 Senior Finance Officer/Assistant Accountant (Queensland)
🏢 SUMO AUSTRALIA
📍 Queensland