Jobs in Canada

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Added 1 month ago
I
Senior Systems Engineer
illumin
Toronto, ON · Greater Toronto Area, Canada
- $100,000 to $150,000 CAD / year
- Full-time
This is a full-time, hybrid position, working in our Toronto office three days per week
Added 1 month ago
O
Sr. Engineer System administrator
OnX
Toronto, ON
- Full-time
Perform operating system installation, configuration, patching, upgrades, and lifecycle management.
Added 1 month ago
Senior Software Engineer – DevTest / QA Automation
Kaseya Careers
Toronto, ON
Kaseya is seeking a Senior Software Engineer – DevTest / QA Automation to design, build, and maintain robust automated testing capabilities across enterprise software platforms.
Added 1 month ago
MT
Infrastructure Engineer
Manx Telecom Enterprise
Permanent North American Gaeltacht, ON
- Full-time
Vacancy Name Infrastructure Engineer Vacancy No VN968 Function Syn - Delivery & Operations Work Location One St Peter's Square, Manchester, M2 3DE Basis Permanent Full Time/Part Time Full…
Added 1 month ago
C
Senior QA Automation – SDET
CGI
Toronto, ON
- Full-time
CGI is seeking an experienced Senior QA Automation Engineer to join our growing Quality Engineering team. This is a hands-on role for a quality engineering professional with strong…
Added 1 month ago
HA
Senior Embedded DevOps and Software Verification Engineer
Horizon Aircraft
Kawartha Lakes, ON · Lindsay, ON
- Full-time
Horizon is seeking an open, enthusiastic Senior Embedded DevOps and Software Verification Engineer. Your role involves developing, maintaining and applying the engineering infrastructure…
Added 1 month ago
Bilingual Senior Specialist, Cloud Infrastructure Operations Engineering
CMHC - SCHL
Ottawa, ON · Toronto, ON · Montreal, QC
The work you do and the work we do together matters. We come to work every day with a common purpose: to contribute to a well-functioning housing system.
Added 1 month ago
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Ingénieur en développement logiciel de tests (SDET)
EXFO
Montreal, QC
- Full-time
Added 1 month ago
GM
Early Career Software Test Developer - Propulsion Thermal Management
General Motors
Markham, ON
- Full-time
We are seeking a motivated software engineer to help verify and validate Propulsion Thermal Management functions across virtual, simulated, hardware-in-the-loop, and vehicle environments.…
Added 1 month ago
LT
Senior Product Cybersecurity Engineer - Platform Security
L3Harris Technologies
Montreal, QC
- Full-time
Job Schedule: Day Shift
Added 1 month ago
R&
Performance Engineer
Robertson & Company Ltd.
Mississauga, ON
- Contract
Robertson is seeking a skilled Performance Engineer to join our client in support of an existing vacancy.
Added 1 month ago
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Performance Engineer
Procom
Mississauga, ON
- $60 to $72 CAD / hour
- Contract
On behalf of our banking client, Procom is searching for a Performance Engineer for a 1-year role. This position is a hybrid position with 2 days onsite at our client’s Mississauga office.
Added 1 month ago
GT
Performance Engineer
Global Technical Talent, an Inc. 5000 Company
Mississauga, ON
- $60 to $70 CAD / hour
- Contract
This is a Performance Engineer role supporting a large enterprise team, with scope that could include supporting anywhere across the enterprise. The position is a long-term backfill role…
Added 1 month ago
UT
Performance Test Engineer #26-23967
US Tech Solutions
Mississauga, ON
- $60 to $70 CAD / hour
- Contract
2 days in office, 3 from Home
Added 1 month ago
C
OT Senior Systems Engineer
CBRE
Toronto, ON
- Full-time
As a CBRE OT Senior Systems Engineer, you will manage infrastructure resources by monitoring system platforms and information technology operations. This job is part of the System…
Added 1 month ago
MD
Senior Systems / Cloud Engineer
Minnesota Direct Care and Treatment
Saint-Paul, NB · St.-Paul, NB
- Full-time
Work Shift/Work Hours: Day Shift
Added 1 month ago
Site Reliability Engineer II (AI Platform)
OpenTable
Toronto, ON
This hybrid role requires working in the office two days per week
Added 1 month ago
C
RDL Jump Host Admin
Celestica
Toronto, ON
- Full-time
Red Hat Certified System Administrator (RHCSA) or Engineer (RHCE)
Added 1 month ago
SG
Tech Ops Engineer
Scientific Games
Montreal, QC
- Full-time
Added 1 month ago
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Intermediate Tier 3 Support Engineer
JSI
Ottawa, ON
- Full-time
A Tier 3 Support Engineer at JSI keeps our Nova and 4Sight platforms stable and helps Technical Support and Engineering resolve the hardest issues fast. Nova is our Kubernetes-based…
Added 1 month ago
SG
Tech Ops Engineer
SCIENTIFIC GAMES
Montreal, QC
- Full-time
Added 1 month ago
O
Senior Software Engineer
Okta
Toronto, ON
- $136,000 to $187,000 CAD / year
- Full-time
We are looking for a Senior Software engineer who is passionate about writing the tools to integrate and support to build large-scale, high-demand software in a fast-paced agile…
Added 1 month ago
Senior Software Engineer
Okta
Toronto, ON
We are looking for a Senior Software engineer who is passionate about writing the tools to integrate and support to build large-scale, high-demand software in a fast-paced agile…
Added 1 month ago
Systems Engineer - Managed Services
Exchange Technology Services Inc.
Winnipeg, MB
The Systems Engineer is responsible for the successful delivery of cloud-based solutions and infrastructure projects, with a key focus on Microsoft Azure and Microsoft 365 (Office 365)…
Added 1 month ago
RJ
Lead Engineer
Raymond James
Vancouver, BC
- Full-time
The Lead Engineer is the senior technical engineering lead within Digital Workplace & Platform, responsible for improving the stability, resilience, automation, control effectiveness, and…

OnX

Sr. Engineer System administrator

Toronto, ON, Canada

Full-time

Apply on LinkedIn About employer

Applications open in a new tab.

Job details

Job type: Full-time
Posting language: English
Posted: Oct 8, 2026

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.

Apply on LinkedIn About employer

More about this job

Responsibilities

Administer, maintain, secure, and optimize enterprise Windows and Linux server environments, including operating system lifecycle management, monitoring, troubleshooting, and cloud infrastructure support across AWS and Azure. Improve infrastructure resilience and efficiency through automation, capacity planning, documentation, cross-team collaboration, and technical guidance for junior team members.

Requirements

Requires a bachelor's degree in Computer Science, Information Technology, Engineering, Telecommunications, or a related technical discipline, along with at least six years of overall IT infrastructure experience. Candidates must have at least five years of hands-on enterprise systems administration experience and skills in Linux, Windows Server, Unix, monitoring, patching, performance optimization, security hardening, and server lifecycle management.

Skills

Linux Administration
Windows Server Administration
Unix Administration
Infrastructure Monitoring
Troubleshooting
Operating System Patching
Performance Optimization
Security Hardening
Compliance Management
Server Lifecycle Management
AWS Administration
Citrix XenServer
Sun Solaris
AS/400
PowerShell

Benefits

Competitive Compensation
Professional Development
Certification Support
Flexible Work Options

Visa sponsorship

Not detected in the job text

Keywords

Enterprise Infrastructure
Systems Administration
Linux
Windows Server
Unix
AWS
Microsoft Azure
Citrix XenServer
Sun Solaris
AS/400
WSUS
Python
Bash
PowerShell
Infrastructure Monitoring
Operating System Patching
Security Hardening
Vulnerability Remediation
Compliance
Server Lifecycle Management
Automation
Configuration Management
Virtualization
Capacity Planning
Performance Optimization
Cloud Infrastructure
Incident Resolution
Infrastructure Governance

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Work requirements

Jobs in Canada