Ontario Power Generation (OPG) Assessment Tests, Recruitment Process & Interviews Online Preparation – 2025

What Is OPG?

Ontario Power Generation provides half of the power generation in Ontario. It is government owned and generates power through hydroelectric, biomass, wind, gas, and nuclear stations. There are 66 hydroelectric stations, 2 nuclear stations, 1 solar facility, 1 biomass station, 1 dual fueled gas and oil station, and 4 cycle-gas and wind turbine stations associated with Ontario Power.

Ontario Power Generation has career opportunities for traditional hires in the energy field and has programs for students and recent graduates. To promote diversity OPG offers programs to help aid Indigenous people in job placement, and has a program to mentor women in the energy industry.

What Is Ontario Power Generation’s Hiring Process?

Start by creating a profile. This will allow you to apply for positions you are interested in. You can also be alerted if positions that match your qualifications become available. When you submit your application you need to make sure you have remembered to attach your resume and any other documents that are required. You will be notified by email if your resume has been submitted successfully. You will not be contacted further unless you have been shortlisted.

If your application has been shortlisted, you will be contacted about the next steps in the process. These steps may include testing, such as aptitude assessments or skills tests.

Following testing, you will be contacted to schedule an interview. Ontario Power Generation Interviews are conducted by a panel. Be prepared to answer behavior-based questions. You are also encouraged to ask questions of the hiring team.

If all goes well, you can look forward to a job offer. You will need to complete the pre-employment conditions. These conditions include things like passing your reference check, and getting your security clearance.

Once you have met these conditions your offer will be finalized, and you will be given your official start date.

OPG’s Pre-Hire Tests

OPG has employees of all different employment backgrounds. With a mixture of technical, business professionals, and engineering employees there are several different tests that are given. You will be tested depending on the skills and knowledge the job you applied for requires.

These are a few of the tests that are most frequently given.

• Mechanical Aptitude Test – If you are testing for a role in plant operations, or other skilled trade position this is a test that you should be ready for. You will need to demonstrate knowledge of simple machinery and basic mechanical principles. There are also questions about basic physics and the practical application of those principles. The test is multiple-choice.
• Operations Test – Geared toward technicians and engineers, this test focuses on engineering concepts. Questions will include topics like technical language, system processes, and programming.
• SHL Psychometric Tests – This includes personality and aptitude assessments that tests your basic aptitude in certain areas.  It looks at your abilities in verbal reasoning, numerical reasoning, and inductive reasoning. The SHL assessment shows how well you are able to problem solve, your reading comprehension abilities, and your ability to think logically. All areas of the test are multiple-choice, and you do not need any specialized knowledge to perform well.

How to Prepare for OPG’s Assessments?

Most testing is able to be done from your home computer. You will be sent a link to the tests, and you will have a specific timeframe in which to complete them. Before you start on the tests, take time to prepare yourself so you can put your best foot forward.

If there are any areas that you know are of importance to your job, such as programming, or mechanical concepts, use your old study guides or online tools to practice and refresh your skills. General aptitude assessments can be prepared for by using reading study guides designed to quiz students, math flash cards to improve your arithmetic skills, and puzzles to practice logical thinking.

Psychometric testing is a common tool in selecting qualified candidates. You can give yourself an edge in this competitive industry by working to ensure your test score stands out.