Lead Power System Engineer

Lead Power System Engineer

Date September 18, 2025

Location Mississauga, ON – Hybrid/On-site

Requisition ID  20594

Status Temporary

Business Unit Markets and Reliability

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 role is a part of the Connection Assessments team within Markets and Reliability. This role is unionized. 

What makes this role exciting

The energy sector is rapidly evolving, offering exciting new opportunities for those who want to make a difference. The successful candidate would be expected to:

• Drive high-impact innovation by leading and executing complex technical studies that demand precision, creativity, and reliability—your expertise will shape real-world solutions.
• Inspire and elevate others by mentoring junior engineers, fostering a collaborative team culture, and playing a key role in building a high-performing engineering community.
• Stay ahead of the curve with a strong commitment to continuous learning—embrace emerging technologies, adapt to evolving industry practices, and navigate regulatory changes with confidence.

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:

• Leading System Impact, Technical Feasibility, and de-registration assessments to evaluate the reliability and operability impact of a new or modified connection, or a disconnection, on the integrated power system using applicable IESO, NERC and NPCC reliability standards.
   
• Overseeing and preparing reports containing the results of the study, any required system upgrades and connection requirements, and a recommendation for the IESO to issue a notice of approval or disapproval for the new or modified connection.
   
• Validating registration data based on information initially submitted for assessment. Re-assess the proposed connection if the registration data differs materially from the configuration or technical parameters that were used by the IESO to approve the new or modified facility.
   
• Coordinating M&SO support for regional and bulk power system planning, including the preparation of evidence required by connection applicants to obtain the OEB’s leave to construct and for inquiries from neighboring jurisdiction as they relate to connection assessments.
   
• Conducting complex technical studies to support the IESO's initiatives for evolving the policies related to the operations and evolution of the IESO-controlled grid and the IESO-administered markets.

In a typical day, you will provide team and technical leadership in the undertaking of complex and advanced studies in the field of power systems in support of real-time operations, operations planning or planning activities.  Lead the analytical and technical development of policies, operating agreements, equipment specifications, operational and outage plans and system investments.  Conduct complex model validation, studies and analysis that:

• contribute to the production of Operating Instructions (including System Control Orders and on-demand limits);
• support IESO security, adequacy and operability obligations found in the Market Rules, and in applicable NERC and NPCC reliability standards;
• assess the impact on reliability and validate performance of new or modified facilities impacting the IESO-controlled-grid;
• develop and update models, data and security applications for existing, new or modified facilities;
• support online and off-line security model management (models, data, and security applications); and
• coordinate with neighboring entities on NERC, NPCC and regional market in the area of reliability matters.

Right now/recently, this position was part of conducting/Leading complex planning studies to integrate Large Datacenters and Inverter-Based Resources (IBRs) into the IESO-Controlled Grid,

Role Requirements 
Our team consists of experts from diverse backgrounds, each bringing their unique perspectives and skills. 

To succeed in this role, you’ll need: 

Education:

• Requires an advanced engineering knowledge of electrical theory, power system analysis and control, associated mathematics and computer science to undertake complex engineering, economic or analytical studies related to the management and control of the bulk power system.  Requires knowledge of technical writing to prepare effective reports.
• This knowledge is acquired through the completion of an engineering/applied sciences degree from an accredited university or by having the equivalent education. Additional study in areas of advanced engineering knowledge, as may be attained through self-study and long-term association with the job demands, combined with short specialized courses, are required to carry out the job requirements. The completion of a related post-graduate degree, is preferred, but not required.
• Requires a license to engage in the practice professional engineering in Ontario and be competent in the field of electrical engineering.

Experience:

• Requires significant exposure to the overall power system operation through progressive training as an engineer in this technical field.  Requires specific experience as applicable to the particular specialty of the group including that of encompassing a leadership role in the undertaking of studies and investigations in this particular field.  Experience will include completion of practical on the job training and experience completing work related to the fields of:
• • utilization of generation resources
  • secure operation of bulk electricity system
  • reliability

Background experience will include:

• electrical engineering design concepts as they relate to the functions and characteristics of power system components
• analytical studies and the application of computer techniques to solve power system problems
• familiarity with power system operation, practices, and policies
• familiarity with electric energy and transmission rights market operations, practices, policies, and Market Rules
• competitive market operations
• provincial operating and system requirements
• particulars of power system operation, including technical features of equipment and facilities, high-tension transmission, system interconnection and methods of attaining efficiency in power production and interchange between systems
• A period of over 8 years, up to and including 10 years is considered necessary to gain this experience.

How We Support You

From a comprehensive total rewards program to dynamic learning and development opportunities—including job rotations to broaden your expertise—we empower you to define and shape your own success. When you join the IESO, here’s what you can expect:

• Best-in-class benefits and long-term support in the form of a defined benefit pension plan. 
• A commitment to flexibility as we currently support a hybrid model where applicable, that supports a blend of remote and in-office work based on business needs. Participating employees typically work in-office a minimum of four days and work remotely up to six days over a two-week period with a goal of maximizing in-office time through the use of established team days. 
• Work in a dynamic and evolving sector that offers exciting opportunities and the chance to explore new career paths.
• Leadership that values meaningful discussions, welcomes feedback, and prioritizes career development. 
• A strong, inclusive culture and a collaborative team environment with a shared passion for impactful work.
• Compensation packages that are regularly reviewed to remain competitive and to best accommodate the diverse needs of our employees. 

Deadline

October 2, 2025. For future reference, please save a copy of the job posting as it will no longer be available once the posting closes.

Thank you for your interest in a career at the IESO. Only candidates selected for an interview will be contacted. Please note that the successful candidate must be legally eligible to work in Canada and will be subject to applicable background checks. 

IESO will not conduct interviews or offer positions via online, text, chat or social media platforms. We will not gather personal information directly from candidates or potential candidates. Selected candidates will work with our Talent Acquisition team to ensure their application is processed.  

We believe in opportunities for everyone.  At the IESO, we know that achieving great results depends on embracing diversity by attracting, developing, and retaining people from a wide variety of backgrounds. We do this by ensuring our recruitment and advancement policies are fair and equitable, and by creating an accessible and inclusive environment—one that values every team member’s unique skills and experiences and ensures they have the support they need to 
achieve their potential. If you require accommodation during the recruitment process, please let us know.  

We’re proud to say we’ve been recognized as a supportive, inclusive employer.