Administration assistant Jobs in Ajax, ON

Status: Contract (4 or 8 months)

Working Conditions: On-site

Education Level: University, minimum 1st year completed

Base Location: Oshawa

Shift: Days

Travel: 10%

Deadline to Apply: May 29, 2026

Salary Range: $33.59 - $44.77 per hour

Electrify your career and help build a brighter tomorrow.

Every generation has a challenge that defines them. At OPG, we are calling on all innovators, disruptors, thought leaders and change-makers. Join us as we work to electrify life in one generation and build a sustainable future powered by our electricity, our ideas, and our people. Join OPG and make history.

Whether you work in the skilled trades or are a business professional, a career at OPG is an opportunity to electrify your life on -- and off -- the job.

APPLYING TO OPG’S CO-OP PROGRAM

This posting is for multiple co-op positions at Ontario Power Generation (OPG) starting in September 2026. Applicants will be reviewed and matched with OPG managers hiring students within their discipline. The job description and accountabilities below are broad and may not reflect the specific duties of each placement. If selected for an interview, you’ll receive details about the specific role, team, and responsibilities.

JOB OVERVIEW

As a Co-op Student at OPG, you’ll gain hands-on experience and develop valuable skills for your future career. You’ll work alongside colleagues from diverse backgrounds and contribute to projects that support a sustainable future.

KEY ACCOUNTABILITIES

• Contribute to real-world projects that align with your field of study and career interests.
• Collaborate with cross-functional teams to support project goals and deliverables.
• Apply classroom knowledge to practical, hands-on work assignments.
• Learn and adapt to new tools, technologies, and processes relevant to the industry.
• Assist with day-to-day tasks and ensure smooth operations within your assigned department.
• Take ownership of delegated responsibilities and deliver quality results.
• Communicate effectively with team members, mentors, and stakeholders.
• Engage in mentorship opportunities to gain insights and guidance from experienced professionals.

QUALIFICATIONS

• Currently enrolled as a full-time, post-secondary student in a recognized institution, pursuing one of the following areas of study:
  • Masters of Business Administration (MBA) with a Co-op component
  • Undergraduate students in the following programs may also be considered:
    • Finance
    • Accounting
    • Business Analytics
    • Data Analytics
• Have completed a minimum of 1st year in an undergraduate program at university by the start of the opportunity.
• Returning to full-time studies in the same program following the completion of the work term OR require the work term or co-op placement to graduate.
• MBA candidates must be enrolled in a formal Co-op program
• Have a minimum average of 70% cumulative GPA (transcript must be included in application).

Important note for Co-Op Applicants: When submitting your application, please include all of your work and volunteer experience on your resume, even if you feel it may not be directly relevant. This allows us to gain a complete picture of your professional background.

Please note that this role requires a rotating work arrangement between our downtown Toronto office and our Oshawa headquarters (one week in Oshawa, followed by one week in Toronto).

All successful candidates will be required to complete a security clearance application. Before the application can be completed, ID verification will be required. To help prevent any potential delays in the security clearance process, candidates will be required to obtain their government-issued physical documents, including one of the following: their driver’s license or passport or status card, as well as their birth certificate and work permit (if applicable).

The successful candidate will exhibit uncompromising integrity and commitment to upholding corporate values, and the OPG Code of Business Conduct.

OPG is committed to fostering an inclusive, equitable, and accessible environment. If you require accommodation during the selection process, please contact AODA@opg.com

What makes a career at OPG different?

With operations across Ontario and the United States, OPG is one of the most diverse power producers in North America. As the largest generator in Ontario, we meet approximately 50% of the province’s electricity needs, largely from low-carbon sources like nuclear and hydro.

As we work to achieve our vision of Electrifying life in one generation, OPG and our family of companies are also helping advance the development of new low-carbon technologies such as Small Modular Reactors (SMRs), refurbishment projects, and electrification initiatives to help power the growing demands of a growing economy. Join OPG and make history.

Please submit your application online at https://jobs.opg.com/. OPG thanks all those who apply; however, only candidates considered for an interview will be contacted.

Please note: All job postings at OPG are to fill existing vacancies within our organization.

OPG may use artificial intelligence (AI) tools as part of the applicant screening process. However, applications will also be reviewed by a member of our Recruitment team to ensure a fair and thorough assessment.

The base salary range considers many factors including, but not limited to experience, education, and training, including any collective agreement requirements for union represented positions. It is not typical for the salary to be offered near the top of the range, and salary is dependent on numerous factors. For management roles, the base salary range does not represent the total compensation package. The total compensation package for regular full-time management roles includes pay-for-performance programs for annual and medium time periods. Maintaining a high-performance culture and excellence is a core expectation of every member of our leadership team and is rewarded through the established compensation framework.

OPG is committed to employment equity. As such, we encourage applicants from equity-seeking communities (Indigenous Peoples, racialized persons, persons with disabilities, and women). We strongly believe that alleviating the under-representation of equity-seeking individuals will create a stronger OPG team and allow us to better serve the needs of our diverse communities.

In order to fulfill the above-mentioned purpose, priority in hiring may be given to qualified persons who self-identify as a member of equity-seeking groups as identified in the application process. This initiative constitutes a special program under the Human Rights Code/Canadian Human Rights Act.