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Added 3 mins ago
I(
Senior Aeronautical Structural Engineer
ITPS (Canada) LTD
London, ON
- Full-time
ITPS Canada is seeking an experienced Senior Aeronautical Structural Engineer to support the design, development, modification, and certification of aircraft and airborne systems across a…
Added 14 mins ago
SG
Senior Solution Designer
SRA Group
NB · New Brunswick, Canada
- $85 to $90 CAD / hour
- Contract
Seeking a highly experienced Senior Solution Designer based in Canada to join our Data & Analytics practice. The ideal candidate will possess deep expertise in Microsoft Fabric, Azure…
Added 17 mins ago
C
Senior Google Cloud Data Engineer
CGI
Halifax, NS
- Full-time
We are seeking a Senior Google Cloud Data Specialist to design, build, and optimize scalable data solutions on Google Cloud Platform (GCP).
Added 17 mins ago
WI
Civil Engineer-in-Training
WSP in Canada
Kamloops, BC
- Full-time
With an unmatched breadth and depth of engineering, advisory and science‑based expertise, our global minds unite to power local solutions.
Added 17 mins ago
MV
*Senior Project Engineer
Metro Vancouver
Burnaby, BC
- Full-time
Our Water Services Department is seeking a *Senior Project Engineer who will be responsible for providing controls and automation programming, technical support, electrical and…
Added 17 mins ago
Z
Lead Data Engineer
ZS
Toronto, ON
- Full-time
The Data Engineering Lead is a senior technical professional responsible for designing, building, and optimizing scalable data architectures and processes to enable efficient data…
Added 17 mins ago
BP
Senior Production Engineer Scheduling
BNP Paribas
Montreal, QC
- Full-time
…Global Head of Automation Services in EMEA, the production Engineer will be accountable for the technical support as well as the projects delivery for the Production and non-production…
Added 17 mins ago
WI
Senior Electrical Engineer - Mission Critical & Data Centers
WSP in Canada
Toronto, ON
- Full-time
Join our Mission Critical & Data Centers team and help shape the future of digital infrastructure across Canada. As a Senior Electrical Engineer, you will provide technical leadership on…
Added 17 mins ago
WI
Senior Electrical Engineer - Mission Critical & Data Centers
WSP in Canada
Ottawa, ON
- Full-time
Join our Mission Critical & Data Centers team and help shape the future of digital infrastructure across Canada. As a Senior Electrical Engineer, you will provide technical leadership on…
Added 17 mins ago
WI
Senior Engineer, Bridges
WSP in Canada
Calgary, AB
- Full-time
With an unmatched breadth and depth of engineering, advisory and science-based expertise, our global minds unite to power local solutions. We are pathfinders and impact makers.
Added 18 mins ago
Civil Engineer-in-Training
WSP
Kamloops, BC
With an unmatched breadth and depth of engineering, advisory and science‑based expertise, our global minds unite to power local solutions.
Added 18 mins ago
C
Senior Consultant, Digital Analytics - Simplii Financial
CIBC
Toronto, ON
- Full-time
…our digital properties is one of our most valuable assets. As Senior Consultant, Digital Analytics, you are responsible for building and managing the analytics infrastructure that powers…
Added 32 mins ago
TR
JREQ203081 Staff Software Engineer I (Open)
Thomson Reuters
Toronto, ON
- Full-time
The CoCounsel Agent Context team is seeking a Staff Software Engineer to set the technical direction for Content Tools - the purpose-built APIs that give AI agents precise, governed access…
Added 34 mins ago
M
Software Engineer II, Core Edge Processing
Marqeta
Remote, Canada
- Full-time
- Remote
As Marqeta's Software Engineer II on the Core Edge Processing team, you will write and ship production code at the heart of our processing systems, learning alongside senior engineers on a…
Added 34 mins ago
SI
Senior iOS Engineer
Scribd, Inc.
Toronto, ON · Vancouver, BC
- Full-time
We are seeking a Senior iOS Engineer to join our Growth Retention & Monetization team. You will be the iOS technical owner for the team across the Everand and Scribd apps, and lead the…
Added 34 mins ago
C
Senior P&C Engineer
CIMA+
Kelowna, BC · Vancouver, British Columbia
- $134,080 to $184,000 CAD / year
- Full-time
…have the skills and experience required to deliver innovative solutions adapted to their reality. Join us and immerse yourself in a dynamic, innovative, and collaborative environment where…
Added 34 mins ago
C
Senior P&C Engineer
CIMA+
Saskatoon, SK · Vancouver, British Columbia
- Full-time
…have the skills and experience required to deliver innovative solutions adapted to their reality. Join us and immerse yourself in a dynamic, innovative, and collaborative environment where…
Added 47 mins ago
SI
Senior Data Engineer / Data Modeler – Banking Domain
Spruce InfoTech Inc.
Toronto, ON
- Contract
Role Overview: We are looking for a hands-on Senior Data Engineer / Data Modeler with strong expertise in both Data Engineering and Data Modeling. The consultant must have excellent Python…
Added 47 mins ago
C
Senior P&C Engineer
CIMA+
Regina, SK
- Full-time
…have the skills and experience required to deliver innovative solutions adapted to their reality. Join us and immerse yourself in a dynamic, innovative, and collaborative environment where…
Added 47 mins ago
C
Senior P&C Engineer
CIMA+
Saskatoon, SK
- Full-time
…have the skills and experience required to deliver innovative solutions adapted to their reality. Join us and immerse yourself in a dynamic, innovative, and collaborative environment where…
Added 47 mins ago
C
Senior P&C Engineer
CIMA+
AB · Edmonton, AB
- Full-time
…have the skills and experience required to deliver innovative solutions adapted to their reality. Join us and immerse yourself in a dynamic, innovative, and collaborative environment where…
Added 47 mins ago
C
Senior P&C Engineer
CIMA+
Kelowna, BC
- $134,080 to $184,000 CAD / year
- Full-time
…have the skills and experience required to deliver innovative solutions adapted to their reality. Join us and immerse yourself in a dynamic, innovative, and collaborative environment where…
Added 47 mins ago
R
Senior Mechanical Engineer
Raise
Burnaby, BC
- Full-time
Raise is currently hiring a Senior Mechanical Engineer on behalf of our client. They’re expanding their team to meet growing needs, making this a unique opportunity to work with an industry…
Added 47 mins ago
MV
*Senior Project Engineer (Liquid Waste, Wastewater Treatment Facility Planning)
Metro Vancouver
Burnaby, BC
- Full-time
Our Liquid Waste Services Department is seeking a *Senior Project Engineer who will be responsible for a wide range of planning and policy initiatives related to wastewater treatment plants…
Added 47 mins ago
C
Senior P&C Engineer
CIMA+
Vancouver, BC
- $134,080 to $184,000 CAD / year
- Full-time
…have the skills and experience required to deliver innovative solutions adapted to their reality. Join us and immerse yourself in a dynamic, innovative, and collaborative environment where…

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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