(Senior) Engineering Technologist

Date: Sep 15, 2023

Location: CA

Company: Independent Electricity System Operator


Requisition ID:  19241
Location:  Mississauga 
Status:    Regular
Business Unit:  Markets & Reliability

Why join us? 

You’ve got great skills. And you want to use them in an organization where you know what you do every day matters. We get that.
We also know that ensuring Ontarians have access to affordable and reliable power doesn’t happen by accident. So we give you the tools, flexibility and support you need to achieve your goals, and development opportunities to help you grow. You’ll thrive in a collaborative, team-based environment that values your unique skills and experiences – and recognizes that when you do better, we become even better too.  

Who we are 

The Independent Electricity System Operator (IESO) works at the centre of the province’s power system, ensuring Ontarians have access to reliable and cost-effective electricity when and where they need it. We operate the province’s electricity grid 24/7, design, run and oversee the wholesale electricity markets, and plan and prepare to meet Ontario’s electricity needs – now and into the future.



The opportunity


We are seeking bright, talented and ambitious applicants who are eager to apply their analytical skills to support the transformation of the Ontario electricity sector while ensuring a reliable and cost effective power grid in the role of a (Senior) Engineering Technologist. A successful candidate is an effective team player, creative problem solver, strong communicator and has an excellent grasp of power system operations and electricity markets fundamentals.


What you'll be doing


The (Senior) Engineering Technologist has the following key responsibilities:

  • Analyze statistical, mathematical and engineering data to assist professional staff carrying out studies relative to power system operation and reliability.
  • Write, modify, implement, test and debug computer programs and associated data to facilitate the monitoring of security limits in the EMS.
  • Design programs based on standard programming models to provide mathematical solutions to engineering problems. Prepare detailed flow charts and design logic and subroutines within the program.
  • Maintain computer programs and associated data in operating and production condition.
  • Plan and carry out tests to detect and isolate problems and discuss findings with responsible personnel. Contact users and others involved to discuss and agree on remedial measures. Correct or modify coding and update documentation, listings and operating procedures.
  • Determine system fault currents under short-circuit conditions through use of commercial power system analysis tools. Obtain all line, machine and transformer data necessary for internal and external systems to establish the short circuit base cases.
  • Prepare load flow base cases for operating and planning studies, outage assessment studies and contingency analysis. Collect, analyze and prepare all data required for the development of loads, generation patterns and system configuration changes essential for the creation of base case load flows.
  • Design and create single line diagrams for the required study areas.
  • Maintain and manage technical databases. Collect data necessary to maintain and update databases used in the operation of the power system; such as, lines, transformers, generator, exciter, circuit breaker, capacitor, loads, relay settings and flowgates.
  • Document and assist in the coordination of planned outages in the short term. Maintain and update data files relative to the present and future status of the power system.
  • Using commercial CAD application, create ICG single line diagrams for Control Room and other users as requested. Print the requested size drawings and distribute to users.
  • Maintain the EMS save cases directory space. Delete old snap shots as required to maintain adequate space to facilitate user studies. Convert any TLR save cases into PSS/E raw files for TLR investigation purposes.
  • Receive assignment from the Senior Power System Engineer, Engineering Manager, and/or Senior Manager in detail on specific problems related to assigned areas of work. 
  • Perform other duties as required.




What you need to succeed


  • Requires knowledge of power system networks, control and feedback systems, electrical and electronic theories, advanced mathematics and engineering principles to analyze statistical, mathematical and engineering data in assisting professional staff to carry out studies relative to power system operation and reliability. 
  • Requires knowledge of computer techniques to write and modify programs and utilize computer facilities. 
  • Requires knowledge of technical writing for the preparation of clear, concise reports. 
  • This knowledge is considered to be normally acquired either through the successful completion of Grade 12 in a Secondary School, Commercial or Technical School plus a three-year course of concentrated study in the appropriate subjects obtained in the Province of Ontario from a College of Applied Arts and Technology, Polytechnical Institute or Community College or by having the equivalent level of education.



  • Requires experience which demonstrates the capability to become familiar with present and planned power system configuration, interrelationships and interdependence between various locations functions and personnel, methods, practices, computer programs and facilities available for carrying out the work and similar detail associated with the position.
  • Requires experience which demonstrates the capability to become familiar with IESO organization, standards and procedures.




What’s in it for you

  • A comprehensive total rewards program, including best-in-class benefits and a flexible workplace 
  • A challenging, fast-paced and collaborative team environment, where your perspectives and experiences matter 
  • Leaders who support your growth and success through regular feedback and coaching 
  • The opportunity to work with some of the brightest minds in the industry 

Deadline: September 29, 2023

For future reference, please ensure to save a copy of the job description as it will no longer be available once the posting closes.

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 thank you for your interest in a career at the IESO, but we will only contact those candidates selected for an interview. 

Note: The successful candidate must be eligible to work in Canada and will be subject to a background check.

The IESO offers a hybrid work model program to most of our employees, based on business needs. Individuals participating in the program can work an average of three days per week remotely within Ontario. It also offers three flex weeks when individuals can work remotely within Ontario . When working in the office, you will be located at our Mississauga location.

Join our talent community

Sign up for talent community; stay in touch, find out about new opportunities – and discover how you can make a difference. Discover how we use our expertise and commitment to deliver reliable and affordable electricity to Ontario’s businesses and communities, and how we’re innovating to secure a stronger energy future for all Ontarians. Visit 
Careers at IESO and be sure to follow us on LinkedIn.

Find out
why we were selected as Greater Toronto’s Top 2023 Employers, and what we offer.