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Added 3 mins ago
IG
Deployment Engineer
Insight Global
Toronto, ON
- $90 to $100 CAD / hour
- Contract
Overview Insight Global is seeking a Forward Deployment Engineer to design, build, and deploy AI-powered solutions that solve complex business challenges. This role sits at the intersection…
Added 3 mins ago
TC
Senior L3 Network Engineer (Network SME and Automation Lead)
Tata Consultancy Services
Toronto, ON
- $100,000 to $120,000 CAD / year
- Full-time
The Senior L3 Network Engineer is the technical lead for the Switch Lifecycle Refresh Program, with responsibility for engineering design, migration planning, technical governance, advanced…
Added 3 mins ago
CH
Quality Manager / FAcT
Canadian Helicopters Limited
Southport, MB
- Full-time
Shall hold, or have held a valid Transport Canada Aircraft Maintenance Engineer License for a period of not less than five (5) years; or
Added 3 mins ago
K
Procurement Engineer
Kinectrics
Toronto, ON
- Full-time
Added 3 mins ago
A
Specialist Engineer - Mechanical Tooling
AtkinsRéalis
Mississauga, ON
- Full-time
Registered Professional Engineer (P.Eng.) in the Province of Ontario and member in good standing.
Added 3 mins ago
A
Staff Data Developer
AtkinsRéalis
Montreal, QC
- Full-time
Added 3 mins ago
R
Principal AI Engineer, Agentic Models and Data Platforms
RBC
Calgary, AB
- Full-time
Added 3 mins ago
AL
Process Engineer - Saint-Patrick
ArcelorMittal Long Carbon LATAM
Montreal, QC
- Full-time
Added 3 mins ago
A
Specialist Engineer - Mechanical Tooling
AtkinsRéalis
Mississauga, ON
- Full-time
Registered Professional Engineer (P.Eng.) in the Province of Ontario and member in good standing.
Added 3 mins ago
ST
Software Support Engineer
StarSpec Technologies
Ayr, ON
- Part-time
…supervision to help you progress towards obtaining your Professional Engineer (P.Eng.) license under the jurisdiction of Professional Engineers Ontario…
Added 3 mins ago
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Mechanical Engineer
BPA
Vancouver, BC
- Full-time
Are you an experienced Mechanical Engineer looking to take the next step in your career while helping establish a new office in Vancouver?
Added 3 mins ago
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Superintendent Engineer
Everllence
Halifax, NS
- Full-time
At Everllence Canada we are currently looking for one 4-stroke Superintendent engineer. Your duty is to manage complex field service missions, onshore and offshore on customer´s site.
Added 6 mins ago
Senior Security Engineer, Threat Response
Asana
Vancouver, BC
We are looking for a savvy Security Engineer to join our Blue Team. You will be a foundational member of the security presence in our Warsaw innovation hub, partnering directly with IT,…
Added 6 mins ago
JC
Journeyperson Welder
Johnson Controls
AB · Nisku, AB
- Full-time
…the evolving needs of the tech industry. Our mission is to engineer and deliver innovative solutions through the relentless pursuit of continuous…
Added 6 mins ago
JC
Welder Apprentice 3rd
Johnson Controls
AB · Nisku, AB
- Full-time
…the evolving needs of the tech industry. Our mission is to engineer and deliver innovative solutions through the relentless pursuit of continuous…
Added 6 mins ago
JC
Electrical Apprentice 3rd Year
Johnson Controls
Nisku, AB · SA - Nisku Carina
- Full-time
…the evolving needs of the tech industry. Our mission is to engineer and deliver innovative solutions through the relentless pursuit of continuous…
Added 6 mins ago
LC
Data Engineer II
Loblaw Companies Limited
Brampton, ON
- Full-time
Loblaw Technology & Analytics is looking for a Data Engineer II to join the Data & AI platform team. You will help design, build, and maintain the cloud services, workflow orchestration,…
Added 6 mins 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 6 mins ago
MT
Technical Staff Engineer – Design & Product Validation
Microchip Technology Inc.
Burnaby, BC · Canada - Burnaby
- Full-time
We are seeking an experienced engineer who wants to tackle challenging system-level problems and influence the quality and success of industry-leading products. This role provides broad…
Added 21 mins ago
NG
Desktop Support Engineer (Level 2)
NSC Global
Brantford, ON
- Other
NSC Global is currently looking for a Desktop Support Engineer Level 2 to join our growing company.
Added 21 mins ago
M
Senior DevOps Engineer
Miovision
Remote, Canada
- $130,000 to $170,000 CAD / year
- Full-time
- Remote
We are currently looking for a Senior DevOps Engineer to contribute to the development of our cloud infrastructure and platform tooling, embed security into our engineering lifecycle, and…
Added 21 mins ago
M
Firmware Engineer, Embedded Linux
Mecka
Richmond Hill, ON
- $150,000 to $170,000 CAD / year
- Full-time
Added 21 mins ago
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Manufacturing Engineer
Mecka
Richmond Hill, ON
- $165,000 to $185,000 CAD / year
- Full-time
Added 21 mins ago
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Edge ML Engineer
Mecka
Richmond Hill, ON
- $170,000 to $190,000 CAD / year
- Full-time
Added 21 mins ago
C
Intermediate P&C Engineer
CIMA+
Kelowna, BC · Vancouver, British Columbia
- $106,720 to $146,740 CAD / year
- Full-time
…what’s expected of us to meet the challenges of tomorrow and engineer a better…

OnX

Sr. Engineer System administrator

Toronto, ON, Canada

Full-time

Apply About employer

Applications open in a new tab.

Job details

Job type: Full-time
Apply by: Nov 5, 2026
Posting language: English
Posted: Oct 6, 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 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 mentoring 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, 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
Python
PowerShell

Benefits

Professional Development Support
Certification Support
Flexible Work Options

Visa sponsorship

Not detected in the job text

Keywords

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

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