Find work in Canada.

323,412 jobs across our Canadian network. How we count

Jobs in Canada

25+ jobs

Email me new jobs Save this search

Added 55 mins ago
C
Communication Specialist, BORN - Permanent Full-Time (1.0)
CHEO
Ottawa, ON
- Full-time
Please Note: If you are a current CHEO employee with access to Workday, please apply to this posting via the Workday application as an internal applicant using the Jobs Hub.
Added 2 hours ago
IC
Business Specialist
IT Connex
Toronto, ON · Greater Toronto Area, Canada
- Full-time
Certifications: ServiceNow Certified System Administrator (CSA), ITIL 4 Foundation Certification, ServiceNow Certified Application Developer (CAD), ServiceNow Implementation Specialist…
Added 2 hours ago
C
Senior Systems & Network Administrator (Windows, Linux, Cisco & F5)
CGI
Toronto, ON
- Full-time
We are seeking a highly skilled Senior Systems & Network Administrator to join our Infrastructure & Operations team. This role is responsible for the administration, maintenance,…
Added 2 hours ago
CO
Network Administrator – Information Technology
City of Methuen
Montreal, QC · Urban agglomeration of Montreal, QC
- Full-time
Network Administrator shall play a key role in the development of the IT department and provide guidance and assistance to ensure uniformity across the city. Duties shall consist of…
Added 3 hours ago
AC
AWS DevOps Engineer
Adastra Corporation
Markham, ON
- Full-time
…will work closely with cloud architects, data engineers, and application teams to support reliable deployments and AWS-based…
Added 4 hours ago
MG
Technical Analyst
Michael Garron Hospital
Toronto, ON
- Full-time
Working closely with the appropriate application, business, and departmental leads, the Technical Analyst will ensure that the systems and IT infrastructure are reliable, secure, compliant…
Added 4 hours ago
AC
Administrator
Aston Carter
New Westminster, BC
- $24 to $25 CAD / hour
- Contract
Added 5 hours ago
TE
Branch Administrator - Temporary 18-month contract
TK Elevator
Burnaby, BC
- Full-time
…obtaining the position. Information submitted as part of the job application process will be kept on file for 3 years from the date of submission in accordance with legislative…
Added 5 hours ago
A
Bilingual Registered Plans Administrator
Aviso
Toronto, ON
- $46,000 to $55,000 CAD / year
- Full-time
We are looking to fill an opening for a Bilingual Registered Plans Administrator to join our Operations Team.
Added 6 hours 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 6 hours 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 6 hours 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 7 hours 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 7 hours ago
SC
Service Now Administrator & Developer
Sheridan College
Oakville, ON
- Full-time
…incumbent is responsible for the platform design and development, application configurations, integrations, unit and component testing, support and maintenance, and continual improvement in…
Added 7 hours 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 7 hours 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 8 hours ago
BC
ATIP Specialist
Build Canada Homes | Maisons Canada
ON · Ontario, Canada
- Full-time
Please submit your application by October 20, 2026 at 4:00 pm EST.
Added 8 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 8 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…
Added 8 hours ago
BC
Executive Advisor, Legal Services
Build Canada Homes | Maisons Canada
ON · Ontario, Canada
- Full-time
Please submit your application by October 20, 2026 at 4:00 pm EST.
Added 8 hours ago
SH
SAP Contract Administrator (12-Month Term)
Siemens Healthineers
Oakville, ON
- Full-time
The SAP Contract Administrator is responsible for processing of all commercial/financial aspects of our daily business during the project realization phase for our long-term Healthineers…
Added 8 hours ago
RB
IT Operations Team Lead
Robert B. Somerville Co. Limited
King City, ON
- Full-time
Added 8 hours ago
S
Senior Specialist, IT Operations (Service Management)
SaskPower
Regina, SK
- Full-time
ServiceNow Certified System Administrator (CSA)
Added 8 hours ago
IT
HR and Payroll Administrator
InTandem Talent
AB · Kitimat, BC · Calgary, AB · Edmonton
- Full-time
We may use Artificial Intelligence (AI) technology to assist with application screening and assessments. This technology is used as a support tool, and all hiring decisions are made by our…
Added 8 hours ago
SJ
Temporary Junior School Teacher - Grade 4
St. John's School
Vancouver, BC
- Full-time
- Contract
- Temporary

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

Report this job