Sr Analyst Market Invoice

Date: August 25, 2026

Location:
Toronto, ON – Hybrid/On-site Requisition ID: 21238 Status: Temporary, Up to 15-months Business Unit: Corporate Services Grade/Band: MP3 Shift Work Annual Pay Range: For standard 35-hour work week Step 1: $104,156 to Step 10: $148,824 The successful candidate will be placed at the appropriate step within the salary grade/band, based on relevant years of experience and other applicable considerations. Why join us?

The IESO is committed to ensuring Ontario’s electricity system meets the province’s needs today and into the future.

We are charged with purpose , delivering reliable, affordable, and sustainable electricity for homes, businesses, and communities across the province.

We are energized to grow , embracing opportunities to shape the future of a dynamic and evolving energy sector while advancing our careers.

We are powered by teamwork , supported by diverse and passionate colleagues who foster respect, celebrate successes, and thrive on shared achievements. At the IESO, it’s not just what we do— it’s who we are Who We Are

Our central role includes managing the provincial power grid in real-time, overseeing and evolving Ontario’s electricity market, engaging with government, municipalities and Indigenous communities, and planning for Ontario’s future electricity needs. Our employees play a key role in driving grid innovation, protecting the system from threats, advancing the province’s energy conservation programs, and forecasting and procuring the electricity resources we’ll need in the decades to come. This is a unionized position that falls within the Finance and Accounting Department in the Corporate Service BU. What Makes This Role Exciting

The energy sector is rapidly evolving, offering exciting new opportunities for those who want to make a difference. To administer the preparation of all invoices to Market Participants (MPs) for the real time and energy forward markets. To administer the preparation of all invoices for Commercial Services and Contract Management agreements. Analyze need and work with other departments in the development/amelioration of systems and processes to deal with new market rules and special circumstances. Ensure appropriate reconciliation of the invoicing/payment systems in place. Ensures accurate recording of all invoice related transactions including prepayments, payment of margin calls, transmission rights deposits. Prepare ad hoc manual invoices to charge MPs for late payments, penalty charges and arbitration costs. Provide reports on non‑compliance issues to senior management. Interface with Market Services staff to resolve MP invoicing issues. Address Market Participants’ questions/complaints on invoicing issues from referrals from the Help Centre. Provide limited supervision to staff assisting in the function. What You’ll Do

In this role, you’ll make a meaningful impact by contributing to the IESO team and supporting the electricity needs of the province through: Administer and participate in the preparation of all market participant invoices for the real time market on a monthly basis and the energy forward market on a weekly basis. Administer and participate in the preparation of ad hoc manual invoices for late payment charges, arbitration costs and compliance penalties. Analyze need and work with other IESO departments to develop/implement new processes as dictated by changes to the market rules or required process improvements. Provide recommendations on streamlining the invoicing functions. Analyze issue from an invoicing perspective and work with Market Services to resolve any discrepancies in the invoice data. Provide subject matter advice regarding issues/questions in response to inquiries from Help Center Staff. Research issues raised by external Market Participants or Senior Management regarding Market Participants invoices or payment status/history. Interact directly with external contacts to resolve these issues. Identify and report potential instances of non‑compliance with Market rules, both on the part of Market Participant and the IESO. Provide subject mater expertise to the Compliance unit and the Dispute resolution unit as required. Oversee and participate in special circumstances where an invoice may need to be adjusted and resent, cancelled altogether or payment put on hold. Manage prepayments, deposits and refunds. Various financial programs must be carefully run to ensure these unusual processes are done correctly and accounted for properly. Where main systems fail such as commercial reconciliation, manual invoices may also need to be prepared which would entail running several contingency database queries to estimate an invoice for each market participant so the market can still be settled in a timely manner. Ensure the preparation and issue of scheduled statements of activity for each market participant detailing the opening and ending balance and