Senior Transmission Planning Engineer

Date: April 30, 2026

Location: Mississauga, ON – Hybrid

Requisition ID: 20944

Status: Regular

Business Unit: Power System Development

Grade/Band: MP5

Shift Work:

Annual Pay Range: For standard 35-hour work week

Step 1: $118,456 to Step 10: $169,208

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 Power System Development Business Unit.

What makes this role exciting

The energy sector is rapidly evolving, offering exciting new opportunities for those who want to make a difference.

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 engineering studies required for NERC planning assessments, NPCC Area Transmission Reviews, planning and reliability outlooks, and resource and transmission procurements.  This includes steady-state and transient assessments of the power system. 
• Assess transfer capability of the Ontario and Interconnected bulk system in the near-term and long-term planning horizons to ensure system adequacy and security, and in support of resource acquisitions 
• Perform NERC/NPCC/Market Rules compliance activities, specifically: 
  • Prepare and deliver evidence demonstrating compliance with NERC and NPCC requirements, including internal control documentation, work procedures, reliability standard audit worksheets, market manuals and training material. 
  • Participate in reliability audits and presenting the evidence, as required. 
• Act as a subject matter expert for the IESO to support Market Participant compliance, such as: reviewing Market Rule exemption applications, reviewing NERC/NPCC Compliance Plans and Mitigation Plans, as necessary. 
• Guiding the evolution of planning processes, tools, and practices to align with future needs and community and stakeholder expectations. 
• Maintain up-to-date knowledge of the state-of-the-art on transmission technologies, best practices related to transmission planning and integrated resource planning, and assist in bringing relevant external trends and practices to IESO’s planning. 
• Participate in economic evaluation of different options for meeting reliability needs as a transmission planning subject matter expert. 
• Manage the work of external consultants acquired to support planning activities. 
• Act as a subject matter expert to other departments and/or business units on matters related to transmission planning and emerging transmission technologies. 
• Collaborating with internal teams and external stakeholders to assess transmission needs and drivers to creatively develop integrated planning solutions. 
• Representing the IESO in community and stakeholder engagements, regulatory processes, and industry forums as a subject matter expert. 
• Mentoring junior staff and providing strategic leadership within the Transmission Planning team and across teams within the IESO. 

Recently, this position was instrumental in the success of the recent Long-term 2 Request for Proposal (RFP), successfully guiding the sector on where transmission capacity exists to site Energy (Wind, Solar) and Capacity (Battery, Gas) resources, and performing  deliverability studies to inform contract awards.  In parallel, this position lead a comprehensive review of Ontario’s Bulk Power System; performing steady-state and dynamic stability assessments for hundreds of thousands of scenarios to ensure the system is adequate to supply load five years into the future and to identify actions needed for the ten year horizon.  
 

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: 

• Our team consists of experts from diverse backgrounds, each bringing their unique perspectives and skills.  
  To succeed in this role, you’ll need:  
• Successful completion of an engineering/applied sciences degree from an accredited university or equivalent education 
• Engineering knowledge of electrical theory, power system analysis and control, mathematics, computers science and the like to conduct engineering, economic or analytical studies related to the management and control of the bulk power system  
• Knowledge of technical writing to prepare effective reports. Requires knowledge of how to deliver presentations on technical topics  
• License to engage in the practice professional engineering in Ontario and be competent in the field of electrical engineering 
• Experience in power system planning or operation, more specifically related to: 
  • Functions and characteristics of power system components 
  • Power system planning, operation, practices, and policies 
  • Electric energy, capacity, ancillary service and transmission rights market operations, practices, policies 
  • Market Rules 
• Experience with NERC/NPCC standards/criteria development and application to power system studies 
• A period of over 8 years, and 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. 
• 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

May 28, 2026. 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.

The IESO currently has a 3-day in-office work week for applicable roles. Over the course of 2026, the IESO will advance plans to acquire additional office space to accommodate more in-office time. While the timeline for moving to a full 5-day in-office model has not yet been established, we are committed to keeping employees and candidates informed as plans progress and give them as much advance notice as possible to prepare for any changes. 

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. 

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