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Added 1 month ago
Senior DevOps Engineer
Style Analytics
Toronto, ON
Full-time
You’ll work closely with engineering teams, but your primary focus will be on automation, infrastructure, and deployment processes, rather than building product features.
Added 1 month ago
Senior Analyst, Quantitative Data Science
iA Financial Group
Toronto, ON · Montreal, QC · Quebec, QC
Full-time
…scalable systems and analytics objectives. The team works closely with Front Office investment teams to modernize analytical workflows, enable cloud-native solutions, and accelerate the…
Added 1 month ago
Senior Analyst, Quant System
iA Financial Group
Toronto, ON · Montreal, QC · Quebec, QC
Full-time
…scalable systems and analytics objectives. The team works closely with Front Office investment teams to modernize analytical workflows, enable cloud-native solutions, and accelerate the…
Added 1 month ago
Senior Software Automation Engineer
Lumentum
Ottawa, ON · Canada - Ottawa (Bill Leathem)
Full-time
Expertise in test automation, including interaction with devices under test and test equipment.
Added 1 month ago
January 2027 - Actuarial Life Non-CPA - Full Time - Montreal
PwC
Toronto, ON
Full-time
A career in our Risk Modelling Services (RMS) team as a Life Actuary will provide you with the opportunity to contribute risk modeling and general insurance advice and consulting services…
Added 1 month ago
September 2027 - Actuarial Life (Non-CPA) - Full-time - Montreal
PwC
Montreal, QC
Full-time
…impact. You’ll build relationships, gain hands-on experience with cutting-edge technologies, and contribute to work that matters - whether it’s helping clients navigate complex challenges…
Added 1 month ago
Systems Administrator & Business Analyst
University of Niagara Falls Canada
Niagara Falls, ON
$90,000 to $110,000 CAD / year
…and integrations. As a Business Analyst, they work directly with operational teams - particularly the Registrar's Office and Finance - to understand business needs, improve processes,…
Added 25 days ago
Senior Software Engineer (Senior AI Engineer)
Scotiabank
Toronto, ON
Experience with Python, particularly FastApi, Gemini (or any LLM Provider) API development, Asyncio/multiprocess management tooling is strongly preferred
Added 1 month ago
Senior Test Automation Engineer
PureFacts Financial Solutions
Toronto, ON
$100,000 to $120,000 CAD / year
Design, develop, and maintain scalable automation frameworks using Java, Python, and Playwright.
Added 1 month ago
Concepteur(trice) logiciel II
EXFO
Montreal, QC · Quebec, QC
Full-time
Expérience de programmation avec plusieurs langages modernes, incluant une exposition à Python, Go et JavaScript/TypeScript.
Added 20 days ago
SOAR Service Lead
Pwc Canada
Calgary, AB · Vancouver, BC · Ottawa, ON · Toronto, ON
Full-time
Collaborate with cross-functional stakeholders to translate business needs into technical automation strategies
Added 1 month ago
AI Enginering Technical Lead (Permanent)
CoreFactor Inc.
Toronto, ON
Full-time
Strong proficiency in Java, Python and Node.js for backend service integration with CCaaS or AI applications.
Added 1 month ago
Software Analyst (SWAT) - Intermediate
Hitachi Rail
Toronto, ON
Full-time
A career at Hitachi Rail will help create a legacy. With operations in every corner of the world, our work goes to the cutting-edge of digital transformation and technology. From the…
Added 1 month ago
Bilingual Senior AWS Platform Engineer
KPMG Canada
Vaughan, ON
Full-time
Troubleshoot complex infrastructure, automation, deployment, and platform issues, including coordination with internal teams and vendors where required.
Added 1 month ago
Bilingual Senior AWS Platform Engineer
KPMG Canada
Oakville, ON
Full-time
Troubleshoot complex infrastructure, automation, deployment, and platform issues, including coordination with internal teams and vendors where required.
Added 1 month ago
Bilingual Senior AWS Platform Engineer
KPMG Canada
Hamilton, ON
Full-time
Troubleshoot complex infrastructure, automation, deployment, and platform issues, including coordination with internal teams and vendors where required.
Added 1 month ago
Bilingual Senior AWS Platform Engineer
KPMG Canada
Montreal, QC
Full-time
Troubleshoot complex infrastructure, automation, deployment, and platform issues, including coordination with internal teams and vendors where required.
Added 1 month ago
Bilingual Senior AWS Platform Engineer
KPMG Canada
Boisbriand, QC
Full-time
Troubleshoot complex infrastructure, automation, deployment, and platform issues, including coordination with internal teams and vendors where required.
Added 1 month ago
Senior Software Engineer
Prophix
Toronto, ON · Etobicoke, ON
Full-time
…Prophix One™ brings planning, reporting, consolidation, and automation together in a single place, and we are expanding its AI capabilities faster than ever. If you want to work on a…
Added 1 month ago
Senior Financial Analyst, Policy Tax
Empire Life
Canada
Full-time
Our mission - Provide expertise and intelligent solutions to help Canadians navigate life with confidence.
Added 1 month ago
Sr. Engineer - Vulnerability Management
OnX
Canada
Full-time
Drive automation initiatives using Python and PowerShell to improve remediation workflows and reporting.
Added 1 month ago
Ingénieur Données Plateforme (Senior)
SII Canada
Montreal, QC
Full-time
Proficiency with Python, Spark, Git, and Microsoft Fabric.
Added 1 month ago
Sr. Engineer System administrator
OnX
Toronto, ON
Full-time
…modernize, secure, and optimize their IT environments. We partner with clients across industries to deliver innovative infrastructure, cloud, security, and managed services solutions that…
Added 1 month ago
Sr. Engineer - Vulnerability Management
OnX
Toronto, ON
Full-time
Drive automation initiatives using Python and PowerShell to improve remediation workflows and reporting.
Added 1 month ago
Spécialiste livraison et soutien / Delivery & Support Specialist - Unification
Genetec
Montreal, QC
Full-time

OnX

Sr. Engineer System administrator

Toronto, ON, Canada

Job type: Full-time
Posting language: English
Posted: Aug 6, 2026

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Original job description

OnX is a leading Canadian technology solutions provider helping organizations modernize, secure, and optimize their IT environments. We partner with clients across industries to deliver innovative infrastructure, cloud, security, and managed services solutions that drive business success.

We are seeking a highly skilled Senior Systems Administrator to join our Infrastructure Services team. This role is ideal for a hands-on technical professional who thrives in complex enterprise environments and enjoys managing mission-critical server infrastructure across Windows, Linux, and cloud platforms.

What You'll Do

As a Senior Systems Administrator, you will be responsible for maintaining, optimizing, and securing enterprise server environments while ensuring the highest levels of performance, availability, and compliance.

Key Responsibilities

Administer and support enterprise Windows and Linux server environments.
Perform operating system installation, configuration, patching, upgrades, and lifecycle management.
Monitor system health, performance, and availability, proactively identifying and resolving issues.
Implement infrastructure improvements that enhance scalability, resiliency, and operational efficiency.
Manage enterprise security baselines, vulnerability remediation efforts, and system hardening activities.
Support cloud-based infrastructure across AWS and Microsoft Azure environments.
Automate operational processes using scripting and automation tools.
Collaborate with networking, security, application, and cloud teams to deliver integrated technology solutions.
Perform capacity planning and growth forecasting for server and compute environments.
Maintain technical documentation, operational procedures, and knowledge articles.
Mentor junior team members and provide technical guidance on infrastructure best practices.

Required Qualifications

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, Telecommunications, or a related technical discipline.

Experience

6+ years of overall IT infrastructure experience.
5+ years of hands-on systems administration experience in enterprise environments.

Technical Skills

Required

Linux Administration
Windows Server Administration (Wintel)
Unix Administration
Infrastructure Monitoring and Troubleshooting
Operating System Patching and Maintenance
Performance Optimization
Security Hardening and Compliance
Server Lifecycle Management

Preferred

AWS Administration
Microsoft Azure Administration
Citrix XenServer
Sun Solaris
AS/400
WSUS
Python
Bash Scripting
PowerShell

Desired Competencies

Infrastructure Provisioning & Configuration Management
Performance Monitoring & Optimization
Virtualization Technologies
Automation & Scripting
Security & Compliance Management
Capacity Planning & Resource Management
Strong Problem-Solving Skills
Effective Communication
Ownership and Accountability
Collaboration and Teamwork
Customer-Focused Mindset

Success Measures

In this role, success will be measured through:

Infrastructure uptime and SLA achievement
Reduced incident resolution times (MTTR)
Security compliance and vulnerability remediation performance
Increased automation and operational efficiency
Adherence to infrastructure standards and governance practices

Why Join OnX?

Work with modern infrastructure and cloud technologies.
Collaborate with experienced technology professionals across Canada.
Gain exposure to enterprise-scale environments and strategic initiatives.
Competitive compensation and benefits package.
Professional development and certification support.
Flexible work options depending on role requirements.

CAD $62,000 – $82,000 base salary (not including bonus or commission)

The compensation range in this posting reflects the Company’s good‑faith estimate at the time of publication. The applicable base pay range for any individual will be determined based on the candidate’s designated primary work location as well as factors including role scope and responsibilities, required qualifications, and the individual’s experience, education, skills, knowledge, and performance. Certain positions may also be eligible for additional compensation such as discretionary merit increases, bonuses, or sales‑based variable compensation in accordance with applicable plans and role requirements.

Diversity & Inclusion

OnX is an equal opportunity employer committed to creating an inclusive environment for all employees. We celebrate diversity and are dedicated to fostering a workplace where everyone can thrive regardless of race, religion, gender, age, disability, sexual orientation, or any other protected characteristic.

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More about this job

Responsibilities

The role involves administering and securing enterprise Windows and Linux server environments across on-premises and cloud platforms. Key duties include system patching, performance optimization, automation of operational processes, and mentoring junior team members.

Requirements

Candidates must have a bachelor's degree in a technical field and at least 6 years of IT infrastructure experience, with 5 years specifically in systems administration. Proficiency in Linux, Windows Server, and cloud platforms like AWS or Azure is required.

Skills

Linux Administration
Windows Server Administration
Unix Administration
AWS Administration
Infrastructure Monitoring
Operating System Patching
Security Hardening
Server Lifecycle Management
Python
Bash Scripting
PowerShell
Virtualization
Capacity Planning
Automation
Citrix XenServer

Benefits

Competitive compensation
Bonus
Commission
Professional development
Certification support
Flexible work options

Visa sponsorship

Not detected in the job text

Keywords

Linux
Windows Server
Wintel
Unix
AWS
Microsoft Azure
Citrix XenServer
Sun Solaris
AS/400
WSUS
Python
Bash
PowerShell
Infrastructure as Code
Vulnerability Remediation
SLA
MTTR
Virtualization
Cloud Computing
System Hardening
Capacity Planning
IT Infrastructure
Managed Services
Enterprise Server
Patch Management
Configuration Management
Security Baselines
Infrastructure Services
IT Consulting

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