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Added 4 mins ago
DP
Office Administrator
Donna Purcell QC Law
Red Deer, AB
- Full-time
We are seeking an experienced Office Administrator to take responsibility for the day-to-day administration and organization of our Red Deer office.
Added 4 mins ago
IG
Network Security Administrator
Insight Global
Vancouver, BC
- $75,000 to $95,000 CAD / year
- Full-time
Insight Global is looking for a Network Security Administrator to join a leading legal services client in Vancouver. This individual will be responsible for supporting and securing the…
Added 6 mins ago
HR
Associate, Order Fulfillment
Holt Renfrew
Mississauga, ON
- Full-time
Provide feedback to system administrator on overall program
Added 6 mins ago
PE
HSE Administrator
Phasor Engineering Inc
Calgary, AB
- Full-time
We are seeking an organized, proactive, and people-focused HSE Administrator to join our team. In this role, you will support the administration and continuous improvement of Phasor…
Added 34 mins ago
AS
Contract Administrator
Aker Solutions
St. John's, NL
- Full-time
Our team in St. John's, NL is growing and we're seeking a Contracts Administrator to support our Contracts Management group!
Added 34 mins ago
B
Facility Manager III
BGIS
Orillia, ON
- Full-time
Added 34 mins ago
PB
Senior Specialist, Payroll and Benefits
Pacific Blue Cross
Burnaby, BC
- Full-time
If you have experience as a Senior Payroll Administrator, Payroll & Benefits Specialist, Payroll Lead, Payroll Supervisor, Benefits & Pension Specialist, Pension Administrator, or Payroll…
Added 34 mins ago
B
General Repair Technician II
BGIS
Vancouver, BC
- Full-time
Added 50 mins ago
YG
Project Administrator
York Group
Edmonton, AB
- Full-time
The Project Administrator assists all facets of the organization, with a particular focus on managing project insurance, utility applications, and permits. This individual enables…
Added 1 hour ago
B
General Repair Technician II
BGIS
Vancouver, BC
- Full-time
Added 1 hour ago
HW & SW Applications Admin 1
Celestica International LP
Toronto, ON
We are seeking a highly technical, execution-focused Hardware & Software Engineering Applications System Administrator to support the core engineering applications environment for the…
Added 1 hour ago
W
Service Administrator
Wajax
Edmonton, AB
- Full-time
Added 1 hour ago
C
HW & SW Applications Admin 1
Celestica
Toronto, ON
- Full-time
We are seeking a highly technical, execution-focused Hardware & Software Engineering Applications System Administrator to support the core engineering applications environment for the…
Added 1 hour ago
SC
Service Now Administrator & Developer
Sheridan College
Oakville, ON
- Full-time
ServiceNow Certified Systems Administrator (CSA) Certification.
Added 1 hour ago
TL
Property Administrator - ROQ City
Tricon Living
Toronto, ON
- Full-time
The Property Administrator is a visible and trusted presence within the community, helping shape how residents experience their home each day. Working closely with the on-site team, the…
Added 1 hour ago
CO
Manager of Parking Enterprise
City of Kitchener
Kitchener, ON
- Part-time
…professionals, 1 Parking Operations Project Manager, 1 Parking Administrator and up to 35 part-time Parking Attendants while fostering a culture of excellence and…
Added 1 hour ago
S
Administrateur(-trice) de contrats / Contracts Administrator
Smardt
Dorval, QC
- Full-time
Added 1 hour ago
BG
Learning Management System Administrator
Brandt Group of Companies
Regina, SK
- Full-time
Brandt Corporate Services Ltd. is currently seeking a Learning Management System (LMS) Administrator for our Regina, SK, location.
Added 1 hour ago
JI
Manager, People Development
J.D. Irving, Limited
Saint John, NB
- Full-time
This role also provides leadership and direction to the Learning & Development Administrator while ensuring operational excellence across the learning portfolio. The salary range for this…
Added 1 hour ago
YO
Financial Administrator, Child Care
YMCA of Hamilton|Burlington|Brantford
Burlington, ON
- Full-time
Added 1 hour ago
SD
Online Learning Facilitator
Sask DLC
Imperial, SK · Holdfast, SK
- Part-time
Follow school-based administrator’s expectations for creating DLCgo accounts/new applications, requesting courses, approving course request, course selections, drops, etc.
Added 2 hours ago
S
Administrateur(-trice) de contrats / Contracts Administrator
Smardt
Dorval, QC
- Full-time
Added 2 hours ago
BC
ATIP Specialist
Build Canada Homes | Maisons Canada
ON · Ontario, Canada
- Full-time
Lead contact and Administrator of Content Manager in resolving any issues with user access and/or problems in using the system.
Added 2 hours ago
CL
Housing Administrator - CLC
Campus Living Centres
Calgary, AB
- Full-time
The Housing Administrator provides the overall administration of the housing components as it relates to student housing. The Housing Administrator reports to the Residence Services…
Added 2 hours ago
HI
Sales Resources Administrator
HUB International
Toronto, ON
- Full-time
We’re looking for a dynamic Sales Resource Administrator to be a key support partner to our regional sales enablement team. This role is perfect for a candidate who enjoys working in a…

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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