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Added 20 hours ago
IT Systems Administrator - Security & Operations
Tree Time Services
Sherwood Park, AB
The IT Systems Administrator owns the security, hardware lifecycle, and operational efficiency of our physical and cloud technology assets (~90 total endpoints across 3 locations).
Added 21 hours ago
MG
Technical Analyst, Database
Michael Garron Hospital
Toronto, ON
- Full-time
Added 1 day ago
C
DevOps Consultant – Application Release & Platform Operations
CGI
Halifax, NS
- Full-time
Support cloud-native and hybrid infrastructure across AWS, Microsoft Azure, and Google Cloud Platform.
Added 1 day ago
F
Systems Administrator III
FYidoctors
Delta, BC
- Full-time
Join our team as a System Administrator III, Enterprise Infrastructure! In this role you’ll oversee the timely and budget-conscious deployment of enterprise systems and software platforms.…
Added 1 day ago
B
Systems Administrator III
BonLook
New Westminster, BC · Delta, BC
- Full-time
Join our team as a System Administrator III, Enterprise Infrastructure! In this role you’ll oversee the timely and budget-conscious deployment of enterprise systems and software platforms.…
Added 2 days ago
T
Oracle / PostgreSQL Database Administrator
TD
Mississauga, ON · Toronto, ON
- Full-time
The Oracle/PostgreSQL Database Administrator is responsible for the administration, reliability, security, recoverability, and performance of mission-critical database platforms supporting…
Added 2 days ago
IT Systems & Support Coordinator
Herschel Supply Co.
Vancouver, BC
…Fridays. You’ll coordinate your schedule with the IT Systems Administrator to ensure full on-site IT…
Added 2 days ago
HS
IT Systems & Support Coordinator
Herschel Supply Company
Vancouver, BC
- Full-time
…Fridays. You’ll coordinate your schedule with the IT Systems Administrator to ensure full on-site IT…
Added 2 days ago
NB
SAS Viya System Administrator
National Bank of Canada
Montreal, QC
- Full-time
A career as a SAS Viya System Administrator within the Cross-Functional Solutions, Acceleration and Data (STAD) team at National Bank means acting as a specialist in the administration and…
Added 2 days ago
T
Oracle / PostgreSQL Database Administrator
TD
Mississauga, ON
- Full-time
The Oracle/PostgreSQL Database Administrator is responsible for the administration, reliability, security, recoverability, and performance of mission-critical database platforms supporting…
Added 2 days ago
D-
Administrateur Système/Réseau
DELAN - IT Talent Solutions
Montreal, QC
- Full-time
The System/Network Administrator will be responsible for the hybrid on-premises and cloud IT infrastructure (AWS, Azure, Microsoft 365) of a large-scale organization, while leading major…
Added 2 days ago
C
Administrateur(trice) de systèmes middleware
CGI
Montreal, QC
- Full-time
…middleware operations? CGI is seeking a Middleware Systems Administrator to join our collaborative GTO Canada team. This is a fantastic opportunity to support stable, enterprise scale…
Added 2 days ago
Lead, Technical Services
MongoDB
Toronto, ON
…one durable process or enablement improvement. Acquire Atlas Administrator…
Added 2 days ago
TC
Oracle Database Administrator
Tata Consultancy Services
Toronto, ON
- $100,000 to $120,000 CAD / year
- Full-time
Partner with infrastructure and cloud teams to design, test, and execute on-premises to AWS cloud database migrations.
Added 2 days ago
O
Sr. Engineer System administrator
OnX
Toronto, ON
- Full-time
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…
Added 2 days ago
MF
Cloud Platform Engineer
MTY Food Group
Montreal, QC
- Full-time
Cloud certifications such as AWS Certified Solutions Architect, AWS Certified SysOps Administrator, Google Associate Cloud Engineer, Google Professional Cloud Architect, or HashiCorp…
Added 2 days ago
TC
Unix Administrator
Tata Consultancy Services
Toronto, ON
- $90,000 to $100,000 CAD / year
- Full-time
Added 2 days ago
S
IT Technology Services Senior Specialist - Linux Administration, Hyperscaler, Pacemaker Operations
SAP
Toronto, ON
- Full-time
…cloud infrastructure providers, including Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP), to offer customers maximum choice for their SAP private cloud…
Added 3 days ago
SS
Azure Infrastructure Engineer
Sonata Software North America Inc.
Toronto, ON
- Full-time
Deep collaborations with partners like Microsoft, AWS, Salesforce, and Snowflake strengthen our ability to deliver cutting-edge AI solutions. Our 30+years of partnership with Microsoft, and…
Added 3 days ago
Bilingual Senior Specialist, Cloud Infrastructure Operations Engineering
CMHC - SCHL
Ottawa, ON · Toronto, ON · Montreal, QC
Added 3 days ago
D
Senior DevOps Engineer - Healix
Deloitte
Toronto, ON
- Full-time
We are hiring a Senior DevOps Engineer to own and evolve our cloud platform on AWS, grounded in infrastructure as code, secure multi-account patterns, and reliable delivery. You will shape…
Added 3 days ago
Technology Lead
Infosys
ON
Infosys is seeking an experienced Databricks Administrator with strong expertise in managing, securing, and optimizing Databricks environments on cloud platform: AWS. The ideal candidate…
Added 3 days ago
ND
Database Admin Senior Specialist
NTT DATA North America
Tiverton, ON
- Other
A professional Database Administrator (DBA) will keep the database up and running smoothly 24/7. The goal is to provide a seamless flow of information throughout the company, considering…
Added 3 days ago
EI
DevOps Engineer
EMERES INC.
Montreal, QC
- Full-time
Relevant certifications (e.g., AWS Certified SysOps Administrator, Azure Administrator Associate)
Added 3 days ago
EI
AWS DEVOPS & INTEGRATION ENGINEER
EMERES INC.
Montreal, QC
- Full-time
Relevant AWS certifications (e.g., AWS Certified Solutions Architect or SysOps Administrator)

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 7, 2026
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 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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