Computer System Engineer Jobs in Mississauga, ON

Venture outside the ordinary - TMX Careers

The TMX group of companies includes leading global exchanges such as the Toronto Stock Exchange, Montreal Exchange, and numerous innovative organizations enhancing capital markets. United as a global team, we're connecting cross-functionally, traversing industries and geographies, moving opportunity into action, advancing global economic growth, and propelling progress. Through a rich exchange of ideas, meaningful collaboration, and a nimble operating model, we're powering some of the nation's most critical systems, fueling capital formation and innovation, bringing increased opportunity to business visionaries, product ingenuity to consumers, and career exploration to our team.

Ready to be part of the action?

We are seeking a Systems Engineer to join our team for a 12-month contract. In this role, you will be responsible for architecting, testing, and executing enterprise-wide software updates and security patches across diverse platforms. You will ensure strict adherence to patching service-level agreements (SLAs) while proactively driving process optimization.

The ideal candidate brings a commitment to automation, programmatic solutions, and Infrastructure as Code (IaC) principles. You will leverage a strategic understanding of Platform Engineering and Generative AI tools (e.g., Copilot, Claude) to accelerate engineering velocity and elevate operational efficiency across our hybrid environment.

• Reports to: Senior Manager, Infrastructure Systems Engineering

• Job Location: Hybrid (2-3 days in office) - based in Toronto, ON

Key Accountabilities

• Strategic Vulnerability Management: Proactively assess and prioritize system vulnerabilities, security threats, and critical bug fixes to safeguard enterprise infrastructure integrity.

• Lifecycle Patch Management: Orchestrate the end-to-end execution of OS and application-level patching across hybrid environments, optimizing for service continuity and minimal operational impact.

• Quality Assurance & Validation: Lead rigorous pre-deployment validation protocols in staging environments to certify patch compatibility and guarantee production stability.

• Automated Infrastructure Scaling: Architect and operationalize automated deployment frameworks, leveraging Infrastructure as Code (IaC) principles (e.g., PowerShell, Ansible) to drive efficiency and consistency across expansive, heterogeneous environments.

• Regulatory Compliance & Analytics: Monitor security compliance and patch efficacy, synthesizing complex technical data into actionable insights for IT leadership and security stakeholders.

• Operational Resilience & Incident Response: Facilitate rapid incident response, diagnosing and mitigating post-deployment anomalies and integration challenges to maintain high availability.

• Technical Governance & Standardization: Establish and maintain robust technical documentation, defining operational standards and procedural frameworks to ensure process scalability and institutional knowledge transfer.

Must Have(s)

• Educational & Professional Background: A degree or equivalent practical experience in computer science/engineering, with 5+ years of progressive system administration experience.

• Patch Management Proficiency: Expert knowledge of enterprise patching tools, specifically WSUS and Red Hat Satellite.

• Automation & IaC Excellence: Proven track record in Infrastructure as Code (IaC) and platform modernization utilizing Terraform and Ansible Automation Platform.

• Cross-Platform Systems Expertise: Strong technical depth in Windows Server, Linux (RedHat), and VMware environments.

• Advanced Observability: Hands-on experience with monitoring and logging ecosystems, such as Splunk Observability/Cloud and Grafana.

• Engineering Modernization & AI Integration: Strategic experience applying Generative AI tools (e.g., Copilot, Claude) to optimize code development and streamline operational workflows.

• Strategic Communication: Exceptional analytical, problem-solving, and executive-level written and verbal communication skills.

Nice to Have(s)

• Experience working with Kubernetes

• Experience working with Citrix

• Public cloud infrastructure experience, ideally AWS

Salary Range: $110/hour - $120/hour CAD. Please note that the salary range included is a guideline only. The salary offered may vary based on factors, including, but not limited to, the successful candidate's relevant knowledge, skills, and experience.

The recruiting efforts for this role are intended to fill a vacant position.

In the market for...

Excitement - Explore emerging technology and innovation, as well as ventures and digital finance that shape the future of global markets! Experience the movement of the market while grounded in the stability of close to 200 years of success.

Connection - With site hubs in some of the world's most multicultural cities, we leverage our size and structure to create rich connections and belonging while experiencing powerful global impact through our work.

Impact - More than a platform, we use our talents to power mission-critical systems that drive global economic advancement, innovation, and growth. As well, our employee-led Team Impact spreads social good via our giving strategy.

Wellness - From empathetic leadership to a culture of flexibility and balance, we believe wellness at work creates the maximum yield and a stronger "we". Plus, with a cloud-first and hybrid workstyle, as well as generous time-off and leaves, we support a life well lived!

Growth - From a growth mindset in our work, to expansion in our business, TMX is home to action-takers energized by the achievement of ambitious growth.

Ready to enrich your career with impactful work, leaders who truly care, and the flexibility and programs to help you thrive as part of #TeamTMX ? Apply now.

Please note that our company is not currently sponsoring work permit applications and the applicant must be authorized to work in the country where this position is located.

TMX is committed to creating and sustaining a collegial work environment in which all individuals are treated with dignity and respect and one which reflects the diversity of the community in which we operate. We provide accommodations for applicants and employees who require it.