Microsoft 365 Technical Specialist

Date: February 25, 2026

Location: Mississauga, ON – Hybrid

Requisition ID: 20895

Status: Regular

Business Unit: Information and Technology Services

Grade/Band: MP4

Shift Work: N/A

Annual Pay Range: For standard 35-hour work week

Pay Range: $111,072.00 - $158,704.00

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 Corportate Technology Solutions department of the Information and Technology Services division.

What makes this role exciting

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

• Provide system support during the production life cycle of information technology systems (developed by or purchased for (IT&I) by establishing user requirements, system design, integration of commercial products, software development, enhancements, troubleshooting, preparing procedures, consulting, training and researching commercial products.

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:

• Develop standards, participate in the development of strategic plans and provide operational and design specifications for Information and Technology Services (I&TS) managed systems, including M365 services.
• Provide systems design expertise to support the development of computer-based information systems/tools to meet the needs of customers by establishing user requirements, developing system designs, integrating commercial products, code software and test systems.  Provide project management support to design projects/teams or information systems or tools.
• Design, build, and operate hosting systems which includes M365 services, and any relevant server and network components to deliver required system functions.
• Manage the evolution of existing M365 services, hosting systems, and tools by implementing enhancements to provide additional functionality, correct problems to improve reliability, maintainability, improve server management capabilities, and respond to advanced system problems or failures to restore system functionality.
• Perform M365 services and server management duties, prepare procedures and/or support personnel involved in M365 services and server management activities.

In a typical day, you will

• Research commercial products and tools which can be used in the design or support of information systems and tools and perform ongoing assessments of their ability to meet current and future requirements.
• Provide systems consulting support to operations, maintenance or software development staff.
• Develop procedures required for the secure operation and management of information systems or tools. Perform hosting attestation to ensure compliance to set standards, meeting requirements, and identification of improvement opportunities.
• Act as a consultant or mentor to peers to advance their learning and facilitate their problem-solving skills with their respective areas of expertise.
• Perform other duties as required.

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: 

Must have [OR Required]

• Requires knowledge of computer science and programming to carry out technical, or analytical studies as it relates to the deployment and maintenance of M365 services (including Entra ID, Exchange, Teams, SharePoint, Purview, and more) as well as provide advice and guidance to others.
• Requires experience in the design, deployment, and support of M365 services and relevant computer systems.
• Requires knowledge of technical writing to prepare effective reports, procedures, and training materials.
• Experience in automation and scripting languages, including PowerShell.
• A minimum of eight (8) years experience in Information technology, ideally in designing and maintaining cloud services and infrastructure solutions.

Nice to have [OR Assets]

• Relevant Microsoft 365 certifications (i.e. MS-102, MS-900, AZ-900)

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: March 11, 2026 at 11:59PM

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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