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Added 6 mins ago
EN
Senior Forward Deployed Engineer (10570) Toronto, Canada
Extreme Networks
Toronto, ON
- Full-time
Title of position: Senior Forward Deployed Engineer
Added 36 mins ago
RT
Structural Engineer
Rio Tinto
Labrador City, NL
- Full-time
We are looking for a Senior Structural Engineer to provide technical leadership and support operations and sustaining engineering project delivery across Iron Ore Company of Canada…
Added 36 mins ago
Senior Software Dev Engineer, EC2 Hyperplane
Amazon
Vancouver, BC
…large, unfamiliar C, C++ and Rust codebases, to change existing systems safely, and as a building block in the diagnosis tools you…
Added 50 mins ago
HR
OCS Senior Engineer
Hitachi Rail
Mississauga, ON
- Full-time
Hitachi Rail (STS) is seeking an enthusiastic self-motivated Senior OCS (Overhead Catenary System) Engineer to work on our HMLRT project. As the successful candidate your ideas for…
Added 50 mins ago
A
Senior Verification Engineer - Security
Arm
Toronto, ON
- Full-time
…including Cryptography, Key Management, Embedded Microprocessor Systems, Hardware Root of Trust, and Secure Boot. You will contribute to the design specification, test planning, testbench…
Added 51 mins ago
Senior Software Engineer, Web3 Backend
Robinhood
Toronto, ON
As a Senior Software Engineer, you’ll architect, build, and scale the backend services, infrastructure, and data systems that support Robinhood’s next-generation crypto, web3, and wallet…
Added 51 mins ago
Principal Software Engineer
Questrade Financial Group
Toronto, ON
As a Principal Software Engineer, you will be the senior technical authority on this platform. You will set architectural direction, raise the engineering bar, and stay close to the code.…
Added 1 hour ago
M
Network Engineer
Moneris
Toronto, ON
- Full-time
Moneris is seeking a highly skilled Network Engineer to design, implement, automate, and support the enterprise network infrastructure that powers our business and payment processing…
Added 1 hour ago
Senior Backend Product Developer, SCM Tech Fulfillment
HelloFresh
Toronto, ON
As we continue evolving this system, extending its capabilities, and preparing for expansion, we are looking for a Senior Software Engineer with strong backend experience, a talent for…
Added 1 hour ago
Application & Infrastructure Analyst III /Team Lead - Mission Critical Development
City of Edmonton
AB
The Information Technology (IT) Mission Critical Application Section of the Edmonton Police Service (EPS) is seeking a highly motivated and experienced professional to serve as the Mission…
Added 2 hours ago
C(
Senior Software Engineer, Elixir
Clarity (formerly Hiive)
Vancouver, BC
- Full-time
As a Senior Engineer at Hiive, you will be a hands-on contributor to the backed system powering our platform, while building a user friendly interface. You will collaborate with technical…
Added 2 hours ago
W
Senior to Principal Instrumentation & Controls Engineer
Worley
Vancouver, BC
- Full-time
The Senior or Principal Instrumentation & Controls Engineer provides technical leadership and instrumentation and control (I&C) engineering expertise across projects for Worley and its…
Added 2 hours ago
W
Senior Arctic Civil Engineer
Worley
Vancouver, BC
- Full-time
We are currently recruiting for a Senior Arctic Civil/Roads Engineer for transportation infrastructure in the Arctic and remote environments. The role provides technical leadership for the…
Added 2 hours ago
EI
Senior Water Resources Engineer, Land Development
Egis in Canada
Toronto, ON
- $105,000 to $130,000 CAD / year
- Full-time
The Senior Water Resources Engineer position is based in Toronto, Ontario, Canada and is responsible for the planning, analysis, and delivery of water resources engineering and hydraulic…
Added 2 hours ago
W
Senior to Principal Instrumentation & Controls Engineer
Worley
AB · Edmonton, AB
- Full-time
The Senior or Principal Instrumentation & Controls Engineer provides technical leadership and instrumentation and control (I&C) engineering expertise across projects for Worley and its…
Added 2 hours ago
W
Senior to Principal Instrumentation & Controls Engineer
Worley
Calgary, AB
- Full-time
The Senior or Principal Instrumentation & Controls Engineer provides technical leadership and instrumentation and control (I&C) engineering expertise across projects for Worley and its…
Added 2 hours ago
EG
Vice President, Municipal Engineering
Egis Group
Toronto, ON
- Full-time
This is a senior leadership role combining accountability with recognized technical authority across municipal infrastructure.
Added 2 hours ago
EG
Senior Water Resources Engineer, Land Development
Egis Group
Toronto, ON
- $105,000 to $130,000 CAD / year
- Full-time
The Senior Water Resources Engineer position is based in Toronto, Ontario, Canada and is responsible for the planning, analysis, and delivery of water resources engineering and hydraulic…
Added 2 hours ago
EG
Project Manager, Senior Civil Engineer - Land Development
Egis Group
Ottawa, ON
- $115,000 to $140,000 CAD / year
- Full-time
We boast a seasoned multi-disciplinary crew ready to support your land development endeavor. To guarantee seamless project delivery, we provide an all-encompassing approach and a…
Added 2 hours ago
EG
Senior Civil Engineer - Land Development
Egis Group
Markham, ON
- $130,000 to $160,000 CAD / year
- Full-time
Our team is currently seeing an experienced Land Development Senior Civil Engineer. We boast a seasoned multi-disciplinary crew ready to support your land development endeavor. To guarantee…
Added 2 hours ago
EG
Senior Civil Engineer - Major Projects (Toronto or Hamilton)
Egis Group
Toronto, ON
- $150,000 to $180,000 CAD / year
- Full-time
…the Egis team has expertise in the municipal and site plan application approvals…
Added 2 hours ago
EG
Senior Civil Engineer - Land Development
Egis Group
Ottawa, ON
- Full-time
We boast a seasoned multi-disciplinary crew ready to support your land development endeavor. To guarantee seamless project delivery, we provide an all-encompassing approach and a…
Added 2 hours ago
EI
Senior Civil Engineer - Major Projects (Toronto or Hamilton)
Egis in Canada
Toronto, ON
- $150,000 to $180,000 CAD / year
- Full-time
…the Egis team has expertise in the municipal and site plan application approvals…
Added 2 hours ago
EI
Senior Civil Engineer - Land Development
Egis in Canada
Markham, ON
- $130,000 to $160,000 CAD / year
- Full-time
Our team is currently seeing an experienced Land Development Senior Civil Engineer. We boast a seasoned multi-disciplinary crew ready to support your land development endeavor. To guarantee…
Added 2 hours ago
EI
Senior Civil Engineer - Land Development
Egis in Canada
Ottawa, ON
- Full-time
We boast a seasoned multi-disciplinary crew ready to support your land development endeavor. To guarantee seamless project delivery, we provide an all-encompassing approach and 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 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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